Your dual voice coil subwoofer will still work with 1 coil connected, but here is what you should know about doing that. Shop for car audio equipment and support our channel at www.emfcaraudio.com
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@audiofanaticz5 жыл бұрын
Really like what your doing with this series Sean. People that have been competing for a while know most of what your showing. However your making videos and explaining things very simply with proof that any enthusiast can follow along with and understand. Keep up the good work man!
@sworded5 жыл бұрын
this series is great, really glad youre doing it.
@HifiVega5 жыл бұрын
Excellent video! This is something I’ve always wanted to see tested.
@checkyourvibe46605 жыл бұрын
This is exactly what I was looking for. Thx ✌🏾
@johndunn995 жыл бұрын
I really like your vids i watch them every week
@bradp51072 жыл бұрын
When I lost a coil in my 15. I ran it on a single coil for years and still had great sound. Actually it gained more power over time. Thanks for the Video.
@twangyyy188882 жыл бұрын
mine is also 15 and i just blew one of mine lol hopefully i can get the same results lol Ive had my sub for years, got it used and I have no money to get a new one
@twangyyy188882 жыл бұрын
im looking I cant find exactly how to wire only one coil. I am an audio noob can you help? what wires go where on the speaker side
@gtstanton9785 Жыл бұрын
How did u know what coil was trashed?
@bradp5107 Жыл бұрын
@@gtstanton9785 ohm meter
@bradp5107 Жыл бұрын
@@twangyyy18888 you dont. Just use it as a single voice coil. Use a meter to find out what side is bad.
@charliefrancis64385 жыл бұрын
This car you’re testing in is very efficient in the 60hz range , incredible numbers, the best enclosure I ever made had a 122dB @ 1 watt at 42 hz , 152 with a 1000 watt amp. If you’re wondering it was 4 15s in a 4th order bandpass tuned to 50 hz , the box was in the bed of a 1992 Ford F-150 , blow through, the box was ported into the cab , Dayton audio dvc 15s and a Memphis audio 1000 d
@Bobcatspiritdude Жыл бұрын
Awesome 👌 Yeah , the pickup truck blow though builds aren't as common nowadays 🙄
@billbrush41145 жыл бұрын
Awesome video! Love these demonstrations. I have a suggestion for another one. When wiring 2 dvc 4ohm subs together down to 1ohm a lot of wiring diagrams show 3 wires in 1 terminal. What's the best way you think this should be done.
@tlinedesigns97285 жыл бұрын
Good video good information for new and experienced people it's nice to know someone cares about there customers understanding how products work and how to use them effectively
@fackamato5 жыл бұрын
How about showing the distortion levels one vs two coils? (also, always run all coils per sub or you risk damage)
@JoshM75 жыл бұрын
This is that I wanted to see! Thanks for the video!
@jonathanaugle5 жыл бұрын
Another reason for the extra bl on 2 coils is they act as inductors on themselves going from a 4 to 8 layer coil gives well over 2x the bl since they build a stronger field off of each other
@nathongknight Жыл бұрын
Thank you! Makes sense about the power being cut in half when using a svc on a dvc sub, but needed to hear it.
@shawnbroyles82745 жыл бұрын
Interesting fact I really enjoy your videos!
@wrxkyle4 жыл бұрын
what are the effects on qts if you short or use a resistor across the unused coil vs leaving it disconnected?
@ABWSKITCHEN Жыл бұрын
I have one 10" Subwoofer dual coil driver connected with only one coil as my amp doesn't support the OHMS load if I connect them both together, I know is not the best option, but it is the only way I can have it working, have been using this way since like 7 years ago, still works and sounds great.
@richardmaxwell69073 жыл бұрын
So what would be the difference be if I hook up one side of two dvc subs in parallel? Final load of all four coils in parallel would be 1 ohm, amp can handle 2. Any help would be great
@FATHERSOFBASS5 жыл бұрын
BROTHER YPUR TEACHING IS ALPT IM GREATFUL... VERY HELPFUL TO UNDERSTAND ALOT OF THIS
@john62rich215 жыл бұрын
Does the first coil induce a voltage on the second coil causing heat?
@Earache.2 жыл бұрын
Can using only 1 Vc on a dvc sub physically harm the sub? Such as tearing the surround etc?
@mrtinytunes5 жыл бұрын
Nice video Sean
@brikssgv90932 жыл бұрын
I would like to see a video on how you would wire a 2 ohm dual voice coil, an a 4 ohn dual voice coil sub together!...
@ZOMGWTFALLNAMESTAKEN2 жыл бұрын
I just tried to read the resistance on a DVC and got an open circuit on one of the coils, im wondering if i can run 1 DVC woofer w/ both connections and 1 DVC wooder w/ a single connections and just leave the open circuit coil out of the loop.
@gabrielgalaxygh2 жыл бұрын
My friend just hooked up 1 side. Do you know what this coudlve done?
@twinkyunouwantmycreamfilli82975 жыл бұрын
Quite interesting and contrary to what i would have just assumed. Good info, ty. I haven't been through all your vids yet, so if you've already covered it ill find it, but an explanation or a general idea of what specs would be worth paying attention too. Maybe for which application also. Like Dampening ect...
@EMFAudio5 жыл бұрын
I've done 2 videos on sub specs, are you referring to amp specs?
@twinkyunouwantmycreamfilli82975 жыл бұрын
@@EMFAudio , oh yeah. I should of mentioned what it was i was talking about, lol. Yes, amplifiers was what i ment.
@troybateson5 жыл бұрын
This is something I’ve been wanting to know. So very useful vid.
@femdulayii1451 Жыл бұрын
Sir can I use single two voice coil woofer for left channel and right channel respectively?
@charliefrancis64385 жыл бұрын
Did you ever do a series vs parallel test? Great channel 👍🏻
@EMFAudio5 жыл бұрын
I haven't, but I definitely could.
@112785jam3 жыл бұрын
I would love to see that next
@mustang60355 жыл бұрын
Do a vid on subwoofer and box box placement on how it affects phase issues of sound waves. I know trunk owners will find that interesting.
@EMFAudio5 жыл бұрын
That would be quite involved and I'd have to have several vehicles to demonstrate. Not impossible, but very time consuming.
@20259442 жыл бұрын
so when only wiring 1 wouldnt the 1 coil get hotter alot faster on rated watts and cause a ton of wear on it or am i wrong i know heat transfers insanely well on copper. but i wanna know the logistics behind temperatures with only 1 coil wired because i got a dvc 1ohm and my amps only 1 ohm stable pends my taramps 12k ate shit on .5 ohms immediately
@ThisIsDaGod2 жыл бұрын
I was looking for this 🔥🔥🔥🔥
@Swag-ts8rf3 жыл бұрын
Love this video , thanks dude
@jordancraighead5 жыл бұрын
this may be way off.. but i imagine you also loose a bit of efficiency by the active coil's flux fields inducing voltage in the non active one.
@EMFAudio5 жыл бұрын
yup
@gruposuenosierreno32574 жыл бұрын
what voice coil would be best for a community mvp18s
@jsfkmm5 жыл бұрын
Can we see the max rms on subs like the x z and ns speakers
@mattalones935 жыл бұрын
Sweet! Can you do an episode on how we can calculate TS parameters without fancy equipment if possible?
@EMFAudio5 жыл бұрын
You can't, it requires equipment. Fs is the only thing you can figure out otherwise.
@mattalones935 жыл бұрын
Oh damn, Sundown built me an NS 10 v4 with a softer spider and (b/c they forgot to measure) said TS perimeters would all be the same except lower Fs, but your video makes clear more things would change. Trying to figure out how I can get TS parameters now
@EMFAudio5 жыл бұрын
@@mattalones93 the difference in specs will be negligible.
@FUCKDSS5 жыл бұрын
mattalones93 I wish some one would because I'm to poor to afford the equipment to test
@mattalones935 жыл бұрын
EMF Audio - It would great to test. The spider is way softer than standard, and me entering 25 hz Fs into WinISD made my box model much more closely to actual performance than stock Fs of 44 hz. Totally happy with the sub on passive radiators, but the specs remain a mystery. hunter callahan - I know. It’d be great!
@stevenrajh3 жыл бұрын
what software you used to get the parameters?
@Trinidadcaraudio2 жыл бұрын
Can i run each coil on separate channels on the amp for eg one coil on channle 1 and the second coil on channle 2
@indopleaser5 жыл бұрын
two requests. one: if you wire a resistor (changes ohms) in to the subwoofers speaker wires, would that be a more precise way to wire down, say for burping? other the the two choices of voice coil configurations. this way you could play around with impedance and also your frequency for the highest score. two: what happens if you wire down really really low, then play a frequency that would normally produce a high ohm resistance? would the increased power from the amp make the score higher?
@EMFAudio5 жыл бұрын
Long long ago, nearly 20 years ago, there was a device sold that would do exactly what you're talking about. The idea was if you had a single voice coil you could wire lower. What we found was you gained power from the amp being at a lower impedance, but you gained no performance because that power generated was lost as heat in the device. It was also limited to 600 watts I think it was, that's all it would handle. Remember, those components have limits too. For the purpose of burping as you say, what most people do is wire in series for daily and parallel for burping. You change the impedance for no money and little effort. That is also part two of your question. If impedance rise is say 4x, wired to 2 ohms would play at 8 ohms and wired to 0.5 ohms would be 2 ohms during play so you do get a lot more power, which in turn makes the score higher.
@billybullfrog5 жыл бұрын
my buddy ran those 20 years ago, we called them choke coils. the amp got hot and so did the coils but he swears it was louder!
@EMFAudio5 жыл бұрын
@@billybullfrog the mind can play tricks with the ears.
@dcsmart93215 жыл бұрын
could you do a test comparing the difference in spl if there is one between series and parallel wiring at the same wattage.
@EMFAudio5 жыл бұрын
If there was a difference, it would be case specific, and within a tenth or two.
@dcsmart93215 жыл бұрын
cool thanks for the reply ,just wondering
@justinroxs335 жыл бұрын
How is that box made is there a port running threw it like a regular ported box or is it a box with a huge piece of pvc Going in it
@EMFAudio5 жыл бұрын
It's a regular ported box with a completely external port.
@JadeB6283 жыл бұрын
aside from the power handling dropping to half. is there any damage to the sub if you're not using full power or even close to full power? cause I have two DVC 4 ohm subs. BUT my amp gets hot running it at 2 ohms. the heat on amp dropped when using one coil
@EMFAudio3 жыл бұрын
If you only use half power with 1 coil, damage, no. Performance won't be as good though.
@carlosreset75015 жыл бұрын
Hi, great video again. But if the sub was rated 750, would you want to power the 1 coil with 750?(at least not for SPL) also, how does this apply to someone who wants to power their dvc sub with an amp on each coil? I don’t know what the original question was, but it makes me wonder if the original question was about only having limited power and trying to find a stable impedance for the amp, so you might run 1 coil. Thanks again man, great videos
@EMFAudio5 жыл бұрын
I mentioned in the video that you wouldn't want to do that for more than a burp because power handling is cut in half. For using 1 coil per channel, you can absolutely do that but with one caveat. The signal going into each channel must be the same. Left and right channels in tracks can be different sometimes, so best practice is to make sure it's a mono signal being split to each channel.
@masterdebater87572 жыл бұрын
@@EMFAudio Thx for that reply i was reading along to find an answer to my own issue. I have (2) DVC subs with 4ohm coils coming in the mail but i have only a 800watt output 4 channel AB amp i dont think the amp will go below the 4ohm so i needed to know if i could home run single channels to each voice coil. I have already ordered the rca splitter so channel 1-2 get same signal and 3-4get the same and will be left and right respective to the head unit and box. Wish i could afford a set of mono amps but it just isnt in the budget so i will harvest the AB 2/3/4 channel i have been lugging around for 2 decades and put it back to work. I'm sure it puts out its rated per channel as it has blown a few subs, woofers, and 6x9's in its life time. Maybe time is running out for the old amp. I got some AudioPipe TXX-BD2-10 i snagged for 200 a pair on the way and a Qbomb10tb dual 10" box with the quad triangle ports to put them into. The web says the subs are 600watt rms so i am shooting for 150watts per channel from the old tired amp and see what gives up first. Pretty sure the amp will start identifying as a space heater...
@jr1001jr3 жыл бұрын
Always use both coils... even if you have to wire up (series) [and/or wire back down if you have multi subs], it's better than only running one coil on a DVC subwoofer.
@BuddaDrifts9 ай бұрын
But is it bad to run on one coil giving it power because i know it's better to run 2 but my terminals off but I still need the sub so can I still slam it on 1 coil and not destroy it
@olszynka78788 ай бұрын
@@BuddaDriftsYes you can, just don't get much movement like with 2 of them. Enjoy
@wishusknight30095 жыл бұрын
Since you tested the woofer parameters with the coils in series but did the spl test with them in parallel, would there be any difference in SPL if both configurations were tested? Assuming you achieved the same wattage in both tests.. My guess is the difference would be negligible, since the amp is large enough to achieve 750 into both configurations.
@EMFAudio5 жыл бұрын
I've tested that in the past and found no difference in score, some people have claimed a difference but I think that is more the effect on the amp and how it's working because they were doing things like wiring at 0.25 ohm and 1 ohm with 1 ohm being louder, while clamping the same power.
@wishusknight30095 жыл бұрын
@@EMFAudio Yeah I would agree. I believe an amp's damping factor can take a real dump at that low of impedance. Among other possible factors.
@1-Six-dee5 жыл бұрын
A video I would like to see is tips for the competing bass boxing and anything that would help in competitions
@robertzinda9818 Жыл бұрын
Make a box like we did when this all started. It's called a death box, it's made in a way that you can mount a sub then slide one chamber into another chamber so you can change the volume of the box. You slide it till you get best output. Then you mark it and do the math or copy the dimensions and then you know exactly in the real world using real dimensions immediately. One box can be used to find the perfect size for any driver as long as you make the ends of the box big enough to mount the dtiver. Adaptors are used or multiple end caps with different sizes holes, using a different end cap makes it easier to figure the total internal volume since your keeping all demensions constant. Changing shape of boxes affects the output. Making boxes without any parallel sides defeats any standing waves. I'll stop here so you can do the research yourself
@1-Six-dee Жыл бұрын
@@robertzinda9818 this is a very good piece of information, but I really want tips on competing in competitions, since this comment I have built a wind monster 6-18's on like 40k watts, I really want to win some competitions but idk what I could or could not compete in
@joeydelmarsjr.6464 жыл бұрын
ok ok this makes sense, so for example if my sub claims 800rms 1600max thats using both VCs. if i end up using just one VC that means its 400rms 800max?
@EMFAudio4 жыл бұрын
In it's most crude form, yes. There are other factors too which are in the video. It's possible to take even less power because of insulation from the coil not being used, depending how the coil is wound.
@3RDERA5 жыл бұрын
Great job on the content. I was hoping you would throw in the coils wired in series as well to see if there was a continued decline in spl as the impedance rised on the same clamped power. Overall great stuff though.
@EMFAudio5 жыл бұрын
Yes, between parallel and series the impedance rise would be different, but with the same clamped power you won't see any difference, unless the amplifier itself does something different as a result of the impedance. That's as much as I can say without letting the cat out of the bag.
@3RDERA5 жыл бұрын
EMF Audio thanks for the reply. I’m just getting into spl in the stock 1000 class dbdrag, I appreciate the content you put up. On my off time when I’m not testing , I’m trying to be a sponge and take in as much as I can from people I think have experience and actual knowledge on the subject. Keep up the great content!
@davidspl5 жыл бұрын
Keep making good content about SPL and Aero Ports
@FATHERSOFBASS5 жыл бұрын
Also can ypu make a video explaing all those things like fs and all thos letters on the charts when ypu where making comparison please and thank ypu
@EMFAudio5 жыл бұрын
kzbin.info/www/bejne/foPbaXSbi7Vkbq8& Already did
@FLYGUYFOX5 жыл бұрын
Great videos is always and thank you for pointing that website out to go ahead and get all the apps and xs power stuff question I want to put a XS power under my GM truck but my truck takes I post what adapters do I need for any work cuz I see y'all have two types maybe three 🤔👍🏽
@EMFAudio5 жыл бұрын
What year truck do you have? That changes what is needed.
@FLYGUYFOX5 жыл бұрын
@@EMFAudio 2003 Chevy Tahoe 5.3 side Post
@EMFAudio5 жыл бұрын
www.emfcaraudio.com/xs-power-551-side-post-adapter/ that would be the side post adapter you need, it works on the D and S series batteries. It will not work on the A or V series.
@FLYGUYFOX5 жыл бұрын
@@EMFAudio ok cool thanks I ordered the wrong one then I ordered the 555
@EMFAudio5 жыл бұрын
@@FLYGUYFOX 555 still works, just don't need the top post adapters in most cases. That's what I had in my truck and left them capped. They were out of 551's when I needed one so I got the 555. Did you order it from EMF?
@kingshumpert70614 жыл бұрын
how did you wire it too the sub to the amp on single coil I need to know
@EMFAudio4 жыл бұрын
The same as you would any other speaker, positive to positive, negative to negative.
@AnDrEw1221003 жыл бұрын
I saw a video years ago on KZbin about a guy bashing Orion hcca subs cuz one blew the dust cap off and he only had one coil per sub hooked up . Had no idea what he was doing probably clipped them to death on one coil per sub lol.
@KonfliKT232 жыл бұрын
Will running one vc on a dvc sub run amp hotter ?
@EMFAudio2 жыл бұрын
The amp is dumb, it knows no differently.
@davidandlaurie14 жыл бұрын
So my question is does it hurt the speaker. That's my worry will it damage it if I don't use both could?....and ty for this video
@EMFAudio4 жыл бұрын
Thermal power handling is cut in half when you use 1 coil, so yes it can hurt the speaker.
@davidandlaurie14 жыл бұрын
@@EMFAudio ty for ur help.
@davidandlaurie14 жыл бұрын
@@EMFAudio here's a question. To get 14v at all times . What step must be taken. I have a sundown SFb 5k .It said it is a 14v amp not sure what that means. Plz send link to video if there is 1
@rarimonamazie56283 жыл бұрын
So basically which is better in terms of getting more out of my sub? using both or one coil?... And is it possible to burn only one coil over?
@EMFAudio3 жыл бұрын
You should always use both coils, watch the video. You can burn 1 coil but the other will be on the verge at the same time.
@rarimonamazie56283 жыл бұрын
@@EMFAudio ok.. Thanks
@moabs10blowthru414 жыл бұрын
Will you be making more merica amps and will they be the same?
@EMFAudio4 жыл бұрын
No.
@jasonandmichellec.50515 жыл бұрын
Is it possible to hook up a 2 channel amp to dual voice coil sub with one channel to each coil?
@EMFAudio5 жыл бұрын
YES! You can do that, however, it is very critical that the input signal be exactly the same. Even if the sub output is summed mono from the HU I have seen different voltages from each output before. If it's not summed, you'd want to use a splitter from 1 to 2 going into the amp.
@timhenry84755 жыл бұрын
How about the best box design software, how to use it too
@Supercharged19765 жыл бұрын
He has already posted a video about box design software.
@EMFAudio5 жыл бұрын
kzbin.info/www/bejne/jHS8gWp5h7lohNE
@catherineharris47463 жыл бұрын
Fkng outstanding! This just made me $100 richer😂 I've been arguing with my friend about this situation for a while, i don't understand how people can't see that it's like taking power away from it when you don't use both coils💡 It's simple as night and day, if you drive at night with only one headlight then your only going to be lighting up half of what you could/should be with both headlights😂 I know it doesn't take away half of the power by using 1 coil but it does take some power away from what it would/could potentially produce like you just proved, THANK YOU!👍👍👍👍
@EMFAudio2 жыл бұрын
The headlight analogy is quite good, I should use that.
@devonolivier47022 жыл бұрын
Only part where mine actually got louder was I have 4 dual 2 ohm mojos. Series parallel to 1ohm final. One of my coils on one sub went out. Didn't know about it for nearly 3 weeks. Honestly thought all 4 were banging. After one day watching the subs move. One seemed off. So I did an ohm check at final and was at 1.7 ohm. So I knew that sub was off somewhere. Turns out whole voice coil was out. So I plugged into just the good one, checked final and was back at 1 ohm again. Grant it. That poor thing gets hot fast af. But also, makes me think that sub was dead from the beginning or near beginning. Because this system never sounded so loud no that it's at 1 ohm and 4 subs moving hahaha. Although, not ideal and I'm getting a replacement
@Trailerpark_pimpin Жыл бұрын
I hope you know it’s not taking power from the subwoofer it’s just not allowing the amp to push out as much because the ohms are higher like in my set up I’m doing right now I have a dual voice coil 15 two ohm but my amp is only rated for two ohm so that’s why I’m only connecting one voice coil because if you ran it at four would take a lot of power away but if you ran it at one it would destroy the amp as I plan on adding another 12 with this 15 that’s why I have a two ohm and not four because when I get this other one I can run them both at four ohm and then together they would drop back down to two
@BallisticSuperiority5 жыл бұрын
What equipment do you use to measure the T/S parameters?
@EMFAudio5 жыл бұрын
WT2
@trucavalier5 жыл бұрын
I like this good info
@sethredding12335 жыл бұрын
Hey man I have a question. So I have two skar sdr 15s on a Orion xtr 2500. I’ve noticed recently that when I have my subs playing full tilt they almost shut off. I know I have sufficient power. I have a extra battery and a 250 amp alt on but it’s almost like the subs go into protect and stop working until I turn it back down. I started the big three yesterday but this has been going on for a little while. I’ve only ran a positive from the battery to the alt and I’ve not run a ground from the motor or battery just yet. Do you have any ideas as to what’s happening I know my amp is capable of stupid amounts of power. I appreciate it 💪🏻
@EMFAudio5 жыл бұрын
Do you have a volt meter reading at the amp? That could give you a baseline for what's happening, then look at solutions. FYI, subs don't go into protect, amps do. It's possible you're making the subs reach a point in excursion which trigger the amp shutting off though, because they're jumping the gap or going sideways.
@sethredding12335 жыл бұрын
I meant amp but no I don’t have a meter I only have the regular meter in my dash
@EMFAudio5 жыл бұрын
@@sethredding1233 Put one on the amp, that may tell you where to start.
@djs_projects_repairs5 жыл бұрын
My vuess would be u may still have a large voltage drop at max volume beed to throw in a meeter
@iinstallrva5 жыл бұрын
Hey EMF Audio..can you guys do a video on motor force..let's say two subs with identical soft parts but have two different motors?. One let's say rated at 1000rms with a average motor and one with monster size motor? What will be the output difference or over all quality difference? Keep up the technical videos guys. I'm learning a lot. @iInstallRVA
@EMFAudio5 жыл бұрын
The motor isn't the only factor in power handling, and odds are if one was 1,000 watts and another one had a huge motor it wouldn't use the same coil so power ratings on the coil wouldn't be nearly the same either. Comparing everything the same but motors where that would work out, I could tell you what would happen but just saying it doesn't have the value as showing it. Showing it would require building 2 subs identical for no purpose other than the video.
@joenunes46804 жыл бұрын
How can I run 2 2 ohm kickers in a down firing box that Separates the two subs by the divider at 2 ohms ?
@EMFAudio4 жыл бұрын
You can't, unless they're dual 2 ohm.
@joenunes46804 жыл бұрын
EMF Audio they are dual 2 ohm
@Keith-hz9zd3 ай бұрын
What will happen with two amplifiers that's the same two one speaker two of each voice coil
@RyanJawswing5 жыл бұрын
1 amp per voice coil? 1 voice coil per channel (stereo or 4ch)? Watts per db? Spl vs box size? (Wanna go loud but dont want to take alot of space) When is 4th/6th order bandpass actually beneficial
@stevebrown15155 жыл бұрын
1.) Yes you can use 1 amp per coil. Absolutely recommend using identical amps. Use a DMM and match gains. To get it exact: Take leads from one coil and reverse the connection so it is out of phase. Run a test tone. Start with volume about midway. Dial one or the other amps gain until there is no movement from the cone, use your hand to feel. Keep raising volume and repeat 1 step. Continue until you get to max listening volume. If the amps have phase dial, not switch, you might have to adjust to get to that sweet spot where there isn't any cone movement Reconnect sub leads correctly. 2.) Yes you can run each coil on its own channel. If there is separate gains for each channel, you can use the same steps in [1.)] 3.) There isn't a magic number, it's subjective to numerous variables. 4.) Box size is predicated by the subs t/s parameters. Get a sub that has needed specs. This link will calculate your subs enclosure size. www.diyaudioandvideo.com/Calculator/SpeakerBoxEnclosure/ 5.) More of a personal choice. Also 6th orders are usually large.
@RyanJawswing5 жыл бұрын
@@stevebrown1515 much appreaciated as ivr been waiting for a vid but i doubt hell respond
@stevebrown15155 жыл бұрын
No problem. Happy bassin'!!!
@jackmills50714 жыл бұрын
@@stevebrown1515 putting full power to a coil that isn't moving seems like a surefire way to burn it.
@stevebrown15154 жыл бұрын
@@jackmills5071 no it won't. All that it does is use the motor force from the one coil against the motor force of the other coil. We are just doing this to dial in the gains ro match them. Once you correctly adjust it, the sub will stop moving. Then hook the wiring up correctly and enjoy.
@dustin13455 жыл бұрын
U should do a video how to design a 2 15" sub c pillar wall for a 02 jeep cherokee
@ryanmalin5 жыл бұрын
dustin a little to specific don’t ya think
@EMFAudio5 жыл бұрын
@@ryanmalin Sounds like a person request LOL
@twinkyunouwantmycreamfilli82975 жыл бұрын
Lol
@ACommenterOnYouTube3 жыл бұрын
So you said that a dvc sub rated at 750W rms is for both coils combined... what if you fed one coil with 750W rms ??
@EMFAudio3 жыл бұрын
It would die quicker, that's technically double rated power.
@ACommenterOnYouTube3 жыл бұрын
@@EMFAudio so i can guess that a dvc sub was intended to be ran on both coils right even though it will run on one coil as long as the power is cut in half of its total rated ..?? And by running one coil its only pushing half its total output .. just like a svc sub rated at 500w rms and you only give it 250w rms ..
@EMFAudio3 жыл бұрын
@@ACommenterOnKZbin That's all explained in this video.
@rmblwgn4 жыл бұрын
I got a 12" type r for free from a coworker.. One coil reads 2ohm, the other 0. What are the chances that only 1 coil is blown vs just disconnected internally? Can a sub with 1 blown coil still sound "ok"
@EMFAudio4 жыл бұрын
It's extremely possible. If it's ready 0 it's open.
@rmblwgn4 жыл бұрын
@@EMFAudio guess I have nothing to lose taking apart the proprietary terminal to check tinsel leads
@adriant8155 жыл бұрын
Have any videos on subsonic filters? What they do and how they work? I’ve never really messed with them too much other than if I move it a certain way I get less bass🤷🏽♂️ also slope on head-units? Thanks!
@EMFAudio5 жыл бұрын
I've been asked about amp specific settings, I haven't done one, I could, I should.
@lorenzomontana97522 жыл бұрын
How can I fix it if one coil isn't working??
@riym072 жыл бұрын
make sure it's wired correctly and if so send it off the be reconed but before you send it off see if your amp is malfunctioning
@Live_Loud3 жыл бұрын
My friends DD 612 was connected only on one voice coil by mistake. When I opened box after few months I realised that mistake. Will there be any permanent damage on this sub?
@EMFAudio3 жыл бұрын
It's possible, look at the coil and see.
@Live_Loud3 жыл бұрын
@@EMFAudio coil is not visible but I checked impedance shown same for both coils. So should I consider sub is OK?
@EMFAudio3 жыл бұрын
@@Live_Loud If both read correct impedance I'd say it's probably fine.
@Live_Loud3 жыл бұрын
@@EMFAudio may I know why you suggested to see the coil? Coil burns if we use single voice coil from dvc sub? I would like to explore other ways.
@EMFAudio3 жыл бұрын
@@Live_Loud It can show heat damage, not necessarily complete burns but discoloration or if it is beginning to unwind.
@jamesg82463 жыл бұрын
If the speakers rated power handling is 750w with both coils combined doesn't that mean one coil can only handle 375w?
@EMFAudio3 жыл бұрын
Sort of. There are some cooling changes with only 1 connected so it's possible it could be even less than half.
@jamesg82463 жыл бұрын
@@EMFAudio So why was 750w safe to put to one coil? That's what's confusing to me.
@EMFAudio3 жыл бұрын
@@jamesg8246 RMS ratings are a power over time. A brief amount of power won't generate enough heat to kill it. From that aspect given no mechanical limitations, you can play 5,000 watts on them fine, briefly.
@jdchmiel5 жыл бұрын
Aww would like to have seen measurements in parallel vs series as well!
@anutom0073 жыл бұрын
Bro... my amplifier produces 4 ohm in bridged mode and the subwoofer is dual voice coil 4 ohm each, so it is okey to connect only one voice coil... right ? Kindly pay attention to my problem...
@EMFAudio3 жыл бұрын
It will play, but your power handling is cut in half and performance will suffer.
@anutom0073 жыл бұрын
@@EMFAudio so what do you recommend for this situation?
@EMFAudio3 жыл бұрын
@@anutom007 Ideally change the sub or change the amp.
@grikisgrikis27793 жыл бұрын
can I use single sub with 2ohm? since it sounds better in my case idk why... when I wired 1ohm before it distorts a lot of clipping now with 2ohm sounds clearer?
@EMFAudio3 жыл бұрын
If your wired to 1 ohm, it sounds like your amp isn't 1 ohm stable, which is why it was clipping.
@grikisgrikis27793 жыл бұрын
@@EMFAudio it says One ohm stable. But idk why I get weak power from sub and clipping amp is 1500rms
@EMFAudio3 жыл бұрын
@@grikisgrikis2779 what amp is it? It's possible you have insufficient electrical so you have low voltage which will cause clipping.
@grikisgrikis27793 жыл бұрын
@@EMFAudio pride mezzo
@grikisgrikis27793 жыл бұрын
@@EMFAudio stock electricity no agm no big three only one small capacitor
@mattb123413 жыл бұрын
And is it safe to run just one coil?
@EMFAudio3 жыл бұрын
Did you watch the video?
@salvatorehayes27535 жыл бұрын
So Wait You Put 750 To One Coil. Doesn't That Mean You Over Powered That Coil? That's Means You Can't Play as Long At 750Watts One One Coil Than 750 On Two Coils Right?
@EMFAudio5 жыл бұрын
Correct. Power ratings on a sub is using both coils, power handling is effectively cut in half using 1 coil.
@Motovader72 Жыл бұрын
Thanks for the actual results in the car. Lol
@geenhousegoon42045 жыл бұрын
I only run one coil if I have a blown coil. I knew it was too good of a deal.
@Buzztiburon134 жыл бұрын
Now ... What about 1 channel or 1 amp by coil ? Dual amp on 1 sub not strapped together or a stereo amp having a channel on each coil of the sub ... Any comments ? A video maybe ? ... Thank you ...
@EMFAudio4 жыл бұрын
That's as simple as gain matching, but I could do something with that when I find the application available for it.
@pyroboy4173 жыл бұрын
What if you ran 2 channels. 1 to each voice coil
@EMFAudio3 жыл бұрын
You should have identical signal into both coils, but it's been done quite a bit.
@pyroboy4173 жыл бұрын
@@EMFAudio yeah it doesn’t seem desireable haha
@promo1305 жыл бұрын
Do you know how much the magnet weighs on the sundown sa-15 ?
@EMFAudio5 жыл бұрын
No idea, I know the whole sub weighs about 32-34 lbs. Have you ever noticed that the best subs don't list a magnet weight as a spec? There is a reason for that.
@promo1305 жыл бұрын
EMF Audio oke, i saw a video from sundown of the sa-15 and looked pritty big so i was just curious how much iT would weigh
@EMFAudio5 жыл бұрын
Looks can be deceiving, some put large plastic boots on them or extend the basket around the motor to make them look bigger than they are. The SA-15 is genuine in it's size though, the rubber boot just goes over the magnet.
@promo1305 жыл бұрын
EMF Audio yeah that i know, Some companies do everything for a profit. was thinking of buying a digital designs redline 615, but this sundown sa-15 looks also a great sub
@EMFAudio5 жыл бұрын
@@promo130 You might want to look at our Lowballer 15 www.emfcaraudio.com/emf-audio-lowballer-15-subwoofer/
@bassmanwell12555 жыл бұрын
Is wiring a svc and a dvc sub with same rms. And size say 12''okay pple say '' its okay its the final ohmrage that matters but i think that x_max matters i read that dvc have lower x max than svc and air moved by cone=bass=(x_max*cone area) ellaborate this please
@EMFAudio5 жыл бұрын
Xmax has nothing to do with the coil impedance unless it's a totally different sub. I'm not sure I understand what you're asking.
@danielmcbride23835 жыл бұрын
Is your box separated do each speaker have its own space if it does it should be fine
@danielmcbride23835 жыл бұрын
@@EMFAudio he is asking if he can wire two subwoofers one svc and one dvc that have the same Rms and same ohms in the same box together
@EMFAudio5 жыл бұрын
@@danielmcbride2383 If it's a different sub, the answer is no, not for ideal results.
@danielmcbride23835 жыл бұрын
@@EMFAudio I got two subs like that and I can't tell the difference when I replace them with two that match both sound good and both still hit 147db and there junk kicker comp
@jeremyellis2695 жыл бұрын
Proof that it's half?
@staytuned93205 жыл бұрын
Wish I understood what "Dl" and all of that other stuff means.
@EMFAudio5 жыл бұрын
kzbin.info/www/bejne/foPbaXSbi7Vkbq8
@wtfcomments25855 жыл бұрын
Now see what happens when you run different signals to each one of the coils.
@EMFAudio5 жыл бұрын
Bad things happen.
@robertzinda9818 Жыл бұрын
That's exactly what a dual voice coil speaker was made to do! They were invented as a way to flatten the unruly old subs response. Before EQs were invented they used notch filters to isolate the frequency with the peak running in reverse polarity. Once EQs came out Dual voice coils were were no longer needed. Then someone sees that old patent and makes a similar sub but uses both in same polarity, once again proving very few new things are ever really new. Things haven't changed much since 1930. Most new patents are bought up by big companies like GE who sits on it just to make sure that idea is never made, allowing them to continue making the same thing they already makibg with huge profits, only changing over to the hiding patent items when they see other companies developing a similar idea. Then we think it's brand new but in reality they're slowing advancement for their own profit. Look into old patents snd you'll see all kinds of new tech that is actually old news to those in the know.
@robertzinda9818 Жыл бұрын
First off, have you tested any dual 2 ohm drivers against the same makers single 4 ohm version of the same driver, I think sn important aspect to test would be heat generated I the gap since that's what kills most speakers unless they have fused tinsel leads like CV HED subs. The other thing I need to ask is how many know when the dual voice coil was invented and why it was invented? Subs first appeared in movie theaters once sound was added to movies. The subs they had back in the 1930s were not well behaved and had huge peaks at certain levels that they (at that time) no way to flatten the response. There were no EQs, so they added the second coil to act as a way to correct the response by running a reverse polarity signal at those frequencies that had the big peaks. This was probably done by using complex passive notch crossovers and resistors to get the signal dialed in as close as possible. This is just one more example of how most things we deal with today are far from bring new ideas
@xaytana5 жыл бұрын
Why aren't quad voice coil subs more common?
@EMFAudio5 жыл бұрын
No point in it. They were used for about a year about 15 years ago, banned from competition, never saw them again.
@1-Six-dee5 жыл бұрын
When they say dual voice coil does it mean there is two separate coils r that there r two different leads that lean into the same coil?
@EMFAudio5 жыл бұрын
It is 2 separate coils wound on the same former.
@Hittin2thabass5 жыл бұрын
I got a video for ya. Explain why impedance rise is a good thing
@EMFAudio5 жыл бұрын
I did do a few videos on impedance rise, and I did explain what it means, which is good. That subject alone would be a very short video.
@FUCKDSS5 жыл бұрын
EMF Audio I watched yours and the sundown vid and the barevids box rise and it made me want to run my e series 12 at 4 times rated power for competition and some serious daily bump however I do still turn it down a bit to ensure I never clip
@EMFAudio5 жыл бұрын
@@FUCKDSS Remember that impedance rise is dynamic, not static.
@Oystein875 жыл бұрын
Why the bass port on the outside of the box?🤔 It's supposed to be on the inside
@mikecheeze43125 жыл бұрын
They have outside ones also. Then you can change the length for different tuning
@Oystein875 жыл бұрын
@@mikecheeze4312 It's just normal ports but on the outside. Can also change the length if they are on the inside and the result is a bit better in my experience.
@EMFAudio5 жыл бұрын
You can't fit that port length in that box, for starters.
@mikecheeze43125 жыл бұрын
@@EMFAudio so really it's because it won't fit vs being more easily interchangeable? Is it common to build a ported box that the port doesn't fit in? Forgive my ignorance but I've haven't seen but a couple boxes with "out reaching ports" or whatever they're called
@Oystein875 жыл бұрын
@@EMFAudio Then it would in general be better to use a single slightliy wider but shorter port. I have tuned some enclosures to go very deep and very loud without having this long ports.
@drawdooWcS5 жыл бұрын
You stated that with only a single coil being used, the rated power would be half. Now you ran the single coil test using essentially double rated power? Wouldn't it behove you to also run the DVC test with double rated power or run the SVC with half rated power for the test to be anywhere near equal? Thought....
@EMFAudio5 жыл бұрын
If I did double power on both coils that wouldn't show a valid comparison because more than 1 factor was changed. Power handling is a thermal limitation in this case. If I ran that same power over time it would eventually fail. For seconds at a time it will not be effected by the additional power.
@drawdooWcS5 жыл бұрын
@@EMFAudio Thanks for the follow-up. I understand now.
@juliuswashington97345 жыл бұрын
I've been using 1 coil on my last subs from 5 months.. still was banging. When I copped my new subs is when I wired both coils. I don't do SPL just what sounds good to the ear. This is good information for those that says running 1 coils will damage your subs.. it's doesn't.. just lowers the power output.
@AB-80X5 жыл бұрын
Two things to note. If you're not in it for SPL but want good sound, use both coils. You will want all the power handling you can get, and get all the sensitivity out of the driver you can. The less sensitivity, the less definition. Secondly you should stay away from these types of subs if you want good sound. Why would you even consider running one coil when there's two? You gain nothing by doing so, and the driver was designed to use both. The driver just gets more lazy and inefficient.
@juliuswashington97345 жыл бұрын
ABOlsen69X At the time.. I was lazy and the sub box is mad heavy.. then here comes the winter ❄️ weather.. With these new subs I wanted to make sure that I did everything right because it’s backbreaking taking that box in and out of my ride.
@10krms85 жыл бұрын
Recone a bannhamer live n tell us about the details n tips n hows coming from u
@EMFAudio5 жыл бұрын
There would have to be a blown one to recone it :-)
@Gcrilla4 жыл бұрын
I read some where you can put a resistor on one of the voice coils and power on the other and change some characteristic of the sub
@EMFAudio4 жыл бұрын
You can, the same as dead shorting one of the coils, but in the grand scheme of things what's changed isn't of benefit to just using both coils.
@Gcrilla4 жыл бұрын
@@EMFAudio no not dead shorting, you add a resistor changing the impedance of the second coil, and that adjusts something it's been along time. I'm not saying this is something you should do, I just remember reading about it and how you can vary some reading, or how the sub acts , the article talked about putting a potentiometer in between the terminals so you can dial it up or down to change it. I'm really gonna have to go find that article again. Edit: also I'm not comparing it to your video, about leaving the coil unhooked. This video just brought it to mind and I remember thinking that was so neat when I was 14-15 years old
@Gcrilla4 жыл бұрын
@@EMFAudio I found this online, it isn't the article but a post relating to it, basically it says using a resistor across the second coil you can adjust the Q to vary the sub for different boxes This is the post I found that explains it. It was post on Nov 11th 2005 and the article I read was a good bit older than that. By placing a resistor across the second coil will allow you to adjust the Q of the driver, so it can be optimised for different enclosure types. I own an Ascendant Audio Atlas subwoofer which is a DVC driver with the second coil designed for the sole purpose of adjustable Q. The coil that gets power from the amp is a 4ohm load, and the coil for adjusting the Q is a 2ohm laod. By shorting the 2ohm coil, a low Q is available which would be best for a sealed box. By leaving the 2ohm coil open, a high Q is available for infinite baffle designs. By placing a resistor of 1.5 ohm (equal to the DCR of the coil), a mid Q is available for ported designs. Keep in mind that with only utilizing one coil, you decrease BL (motor strength), and decrease power handling. I had originally used my Atlas subwoofer in a mid Q design, but have found that wiring both coils in series for a 6ohm driver works quite a bit better.
@EMFAudio4 жыл бұрын
@@Gcrilla I've never tried it but the Qts shouldn't change THAT drastically. There shouldn't be a shift from like 0.3 to 0.8
@EMFAudio4 жыл бұрын
@@Gcrilla Shorting the coil is something you're doing when you put a resistor in there. I mean that as connecting POS and NEG together with no signal.
@jedpetersen38065 жыл бұрын
Would someone please explain to me why anyone would want a transducer with such horrible efficiency! I've tried to get on board with the ideas behind these kinds of drivers and they just don't cut it so please tell me why I would use a driver like that!
@AB-80X5 жыл бұрын
Well, if you know what you're doing, and what actually is needed to create good sound, you don't want a driver like this. I can't remember ever seeing a driver with such a low sensitivity. I don't think most people realize that the low sensitivity equates to a driver that has very poor resolution and definition. When listening to music, the excitement is in the definition. This is what's wrong with the car audio world today. Companies that produce drivers that are not very good, that cost too much, and need a lot of power just to "burp". Hell, if you ask a company like Sundown or B2 Audio how they test their drivers when they make their claims of power handling, they can't give you a straight answer. They don't go by any standards. While you have companies like Scanspeak, Dynaudio, Focal, Morel, Gladen and Stereo Integrity who are actually doing it right, you have a ton of companies selling snake oil - especially in the SPL world.
@jedpetersen38065 жыл бұрын
@@AB-80X Yup I totally agree and yet we still have this type of driver being what people ask for and if you explain to them why it's not a good thing they automatically dismiss you with their confirmation biased because it's what all the competitors are doing 🤔
@EMFAudio5 жыл бұрын
@@jedpetersen3806 If you want to play lows well, you're going to have that type of sensitivity. Additionally, that spec means less than you're making it out to bed. Example, in this very video a 4 dB difference in sensitivity and a 1 dB difference in testing. It isn't an indicator of how loud it will be. Competitors aren't playing lows, and don't use this type of driver.
@EMFAudio5 жыл бұрын
@@AB-80X A low sensitivity has nothing to do with accuracy, or resolution, or definition. I'd be interested to know what you think is a "good" driver, so I can tell you why it's not for every purpose the subs you say aren't good. I don't know about B2, but Sundown can tell you how they get a power handling number. I can tell you how EMF does it too. FYI, Stereo Integrity is located INSIDE Sundown Audio, literally, inside, in the middle of their building. You are somewhat right in that Sundown doesn't go by the "standards" you speak of, because if they did, car audio people would blow everything up. They use much more conservative ratings, as do we.
@jedpetersen38065 жыл бұрын
@@EMFAudio Yeah I know one needs excursion for low frequency reproduction but the idea of quality audio is to achieve a linear reproduction of frequencies which means those inefficient low-frequency drivers must be implemented in multiple driver applications in order to achieve a high enough sensitivity to be equal to higher frequency drivers plus I realize that a driver's sensitivity is not an indicator of how loud it will be but it is an indicator of how inefficient it is and how much power it requires to get loud where an efficient driver will get much louder with less power so as I reiterate why would anyone want to have such a low efficiency driver 🤔
@jondoe66185 жыл бұрын
146db??? Thats about what I guess my 2-15's do at around 2000 watts. Must be one heck of a 1 note wonder box for sure.
@danielmcbride23835 жыл бұрын
A lot of the higher end subwoofers in a good box will do those numbers
@jondoe66185 жыл бұрын
@@danielmcbride2383 i a one note wonder box on thousands of watts sure.
@jimjones32873 ай бұрын
you will get higher spl numbers at higher frequencies. this sub peaks at 60Hz so he tested it at 60Hz. Most people don't tune boxes to 60Hz except for SPL competitions. Getting 140db at 30Hz is going to be a lot tougher than at 60Hz.