The Argument Why 8" Subwoofers Suck Donkey Eggs. Don't be a potato head

[@nathanjames4242]

Man, I had four PBX 8" in a jeep Cherokee and it sounded so good.

[@CrashPCcz]

Vas is not a requirement of a driver. You can almost ignore it in the assesment of total performance. Vas is a requirement to follow frequency response alignments by Thiele&Small. We are well past that. With good amps and processing, we are not aligning anything. We are extracting performance from available motor force and cone displacement.

[@1Patient]

I like the cover photo on this video 😅

[@RobotUnderground]

Makes me miss 'Tater Skins by Keebler.

[@angsieverz4938]

You cannot bend the law of physics. A smaller diameter 8, is easier to start stop for accurate bass. But this is SQ. For louder applications, the cone area and magnet strenght is in play.

[@lunam7249]

i should have my kitten slap you with his paw

[@marcuslinton310]

True, you cannot bend the law of physics. Smaller subs have to move further in and out to produce the same sound as larger subs. The more distance a sub has to travel, the more distortion it can add as well. So, please explain how something traveling further in and out is somehow easier to start and stop? Well, you can't. Which is why suggesting that smaller is more accurate is crap. The less a speaker has to move, the far more accurate it is. Larger subs will produce bass much better then smaller subs, plain and simple.

[@CrashPCcz]

"Get him!" All this nonsense needs constant debunking. Great job.

[@jasonbolka9713]

I really need the 9500 motor hidden under the bench

[@RobotUnderground]

Text me an offer 602-312-6504

[@Acoustic_Theory]

To spite you, I'm looking for a 5.25" subwoofer right now.

[@crazy8sdrums]

Are you cleaning up the campfires from the Mecca of Car Audio that Phoenix Arizona once was?

[@RobotUnderground]

Maybe last decade, yes. But there's still Rockford, MTX and JL Audio here.

[@crazy8sdrums]

@@RobotUnderground I made amps for MTX at the location across the street from the Fry's Electronics...now also a corpse.

[@RobotUnderground]

@@crazy8sdrums Fry's is a corpse. Jonathan still shows up in the vette and acts weird every day.

[@emac800]

I wish I could fit 10s under the rear seat of my Nissan Titan, but I can't, unless I want shallow mount, down firing, which I don't. The only forward firing sub is an 8 or 6.5, and I don't want 6.5s. I'm not looking to flex my windshield, but I figure four 8s with a box tuned to 34Hz, and 1500 watts on them will make me happy with the music I listen to.

[@RobotUnderground]

Most high powered 8's won't play that low but you need a big motor in order to fit in a box that small. It's a tough call.

[@emac800]

@@RobotUnderground, I suppose I can just do a sealed box, and call it a day.

[@RobotUnderground]

@@emac800 yep, and EQ the shit out of them

[@lunam7249]

emac.... me and the pope forgive you....just this once....but if happens again....time for a new ride

[@thehugob77]

The perfect way to call out crazy women is after 2 to 10 minutes of tech talk. None of them would listen this long. Excellent.

[@RobotUnderground]

Yes, I totally planned it that way. lol!

[@jjhack3r]

For audio quality, a 12 inch sub with an 8 inch sub in its own smaller box will be better than just two 12 inch subs.

[@RobotUnderground]

If you say so. I disagree but you're welcome to build whatever you want.

[@jjhack3r]

@@RobotUnderground it’s about frequency response. Covering a larger range will remove dead spots. My 12’s alone don’t do much when 80hz hits them...

[@RobotUnderground]

@@jjhack3r Silly Billy. Make sure your low pass filter is up around 120Hz

[@jjhack3r]

@@RobotUnderground it is. i'm not saying it won't produce those notes, its just not the kind of clean, head shattering higher frequency bass you can get from a smaller box and sub. tiny speakers respond better to higher frequencies but lack in low frequency performance. for high bass frequencies, an 8 inch sub will be cheaper, more power efficient, and be less distorted than a larger sub. if you're only using one sub, like you said, a 10 is a good compromise, but an 8 and a 12 used together is better quality if you tune the boxes to cover separate frequencies. a large sub can be tuned for higher hz but from my experience, it sounds muddy almost like the cone is resonating, and the sub isn't moving to its max potential. i'm not trying to say you're wrong, i'm just telling you that small subs aren't useless unless your only concern is SPL. power is fun but quality makes the fun last... i spent a year with two 12s and had a blast, but the loudest part of every song was 30 to 50 hz, making most music sound the same. high hz bass is underrated... then again, its just how i like it. btw i respect your work. you know what you're talking about... most of the time... ; P lol everyone likes different types of women

[@radiospank]

@@jjhack3r I agree with you totally, small woofers don’t get low cause of cone area but they are lighter and can handle transients better; I’m talking about higher power subs too because you can get a low power 12 with soft suspension and short xmax and it will play higher notes easily. So for me based off my own experience with sq woofers, light mms and small xmax big cone is equal to an eight with soft suspension and avg xmax. That’s why I like 10s if I’m going with your standard 2.5 coil 500-700 watt rms

[@mrbrowz1000101]

New Versus battle: Robot Underground vs. MBEnclosures lol

[@RobotUnderground]

lol. I was doing his level of work in my teens. Now I just send the plans over to my CNC guy and get one of the helpers to assemble. It's not hard at all.

[@stevel.2759]

Generally they are a waste of time for the work and payoff. In 1992 there was a way to put four eighths in a box and a Nissan Sentra Fox Gates or was it a Mustang LOL

[@RobotUnderground]

I've had fun with them they make really good mid bass. We did a box one time with 8x 8's. It was like having a gorilla with a sledgehammer in the backseat but there was no lows

[@jeremyhearn8941]

Where are those funky pop dust caps

[@RobotUnderground]

Ugliest is the Urban Audioworks

[@Reedic20]

Everyone has there own options on shit just because you think they are junk doesn’t make them junk

[@RobotUnderground]

Oh, I still make them. I still think that 10's are a better choice though. But if people want to use a frozen turd with a condom as a dildo.... and pay me for it?? Be my guest.

[@jasenlauver4862]

RDS Audio makes a eight with a 2.5 inch coil that slams. It was just on MB enclosures.

[@RobotUnderground]

Right, but it's not as good as DD according to MB Enclosures. MB will also take an 8" sub with a Vas of .14cf and put it in 2cf.

[@jasenlauver4862]

@@RobotUnderground He hasn’t done any testing on it yet. I know he will be impressed, these eights just got released. I put it up there with some of the top performing eights.

[@ogairbender808]

Handies not hate 🤣🤣🤣🤣

[@RobotUnderground]

May the jizz be with you.... Always.

[@angelvip2474]

Question. 1 Jensen 12" or 8 6.5" gately subs in a gately box under a truck seat. 🎤 drop.😂jk. Nice vid bro

[@RobotUnderground]

Gately. lol.

[@Joe-fl9qy]

I had a Skar VVX 8 in an old sas bazooka enclosure .5 cf... on 400rms It puts out 128db very nice in a small vehicle

[@BARBELLS-AND-BUDS]

I'm sure Carver had no more influence on the system than just putting the amp in it

[@RobotUnderground]

Sheeeeeeit, Bob Carver went with straight line voltage on the first revision. NO TRANSFORMER = FIRE.

[@BARBELLS-AND-BUDS]

@@RobotUnderground does that mean an unregulated power supply?

[@RobotUnderground]

@@BARBELLS-AND-BUDS lol. There wasn't really a power supply. He just had a rectifier in there which would yield a rail of 120v DC, use some caps to smooth it out and then send that to the rails. for the output section. In home, there's not really a competition between regulated and unregulated because you have The Grid as your power source. In car audio, you have lots of limitations.

[@BARBELLS-AND-BUDS]

@@RobotUnderground Sounds like an interesting design. I thought large amplifiers had to have some sort of a toroid or other type of power supply I haven't opened up all my amps or anything but the few pro audio amps I have that I used to power subs have large power supplies

[@RobotUnderground]

@@BARBELLS-AND-BUDS It depends on the design. Some makers use a switching power supply like in I computer

[@brockmarquis8511]

MB enclosures swears by Eights

[@RobotUnderground]

Yep and he's solid dumb

[@MrFARTSANDWICH]

I don't know I have4 JL W3 8's in my Durango doing 138's@ 36 hz with a frequency range of 25 to 70 Hertz and I still have my third row seat. you can't even visually tell that they're in there when you walk by it. I don't even need an extra battery to run it. For everyday listening that's more than enough it's never going to win any competitions but that's not what it setup for.

[@RobotUnderground]

And just think about all the db's you could have had if you'd used 10's instead.

[@MrFARTSANDWICH]

@@RobotUnderground you seem pretty knowledgeable in what to do. What would be the difference in DB output between a 12in woofer with a certain cone area and 30 mm of one-way Excursion that has a thousand watt RMS rating. And a 12in woofer with the same cone area and same Excursion that handles 5000 Watts RMS. In the same spect enclosure?

[@RobotUnderground]

@@MrFARTSANDWICH Good math question. Do the SD vs bore calculations first.

[@MrFARTSANDWICH]

@@RobotUnderground I'm under-educated please elaborate

[@RobotUnderground]

@@MrFARTSANDWICH Start with the Loudspeaker Cookbook. audioxpress.com/news/audioxpress-april-2021-looks-ahead-at-the-evolution-in-voice-communication-and-true-wireless

[@mumbols]

This video hit the spot and It pissed me off bad! You proved my point I called stupid for plus I know nothing😂 yes!!!!!!! Thank you!!!! Now I know why they never want to meet up get down😂. Im late to channel glade the algo got you on! You are invited whenever man ribs asada, chicken, fish, shrimp, modelo, coors, 1800, elhem, jd help you self! Please!

[@scottiffanimccord1509]

I agree..

[@666Necropsy]

yep

[@RandoManFPV]

Holy crap, watching you walk around your shop and seeing all the hardware and tools laying around for audio equipment makes it impossible for someone like me to doubt what you say. Your shop looks like battle grounds of a war waged with speakers and woofers lol I mean this in the most respectful and envious of ways

[@RobotUnderground]

Oprah still looks like Mr. Potato head.

[@Dan_Hazard]

@@RobotUnderground what are your thoughts on 2 10s vs 1 12? Also yes she does 😆

[@RobotUnderground]

@@Dan_Hazard It comes down to displacement and force. Many times I recommend a more hearty single driver than 2x mediocre subs. Takes up less space, tends to be a better value / bang for buck. It depends though if someone already has a box or thinks they can hear a difference between the two. You always want to look at the Fs and then what enclosure you're using. On average, two 10's will displace more air, however a single 12" that is 2x the power may be a better buy and take up less space. So I'd recommend the single 12".

[@big_mon1]

The problem is that people use 6.5" and 8" subs in the wrong setups. Small subs are for smaller builds in smaller vehicles with smaller cabin space. I have 2 DD Audio 2508 (SC) in a 4th order in my Honda Vamos micro van. They hit harder and sound better than most 10"s.

[@RobotUnderground]

You are correct in that the only place you should be using small drivers are when you have no other choices. Imagine though if you'd used 10's instead of 8's in your setup.

[@big_mon1]

I only run DD and I don't have the room to run 2 10" DDs because I need the cargo room. Their subs run a little lager than most subs. The 8 is actually closer to the size of a 10" sub. I'd put my 8's up against any 10's. You should run a test on one. I'll put money on it.

[@RobotUnderground]

@@big_mon1 There are MANY, MANY other great makers of speakers than just DD.

[@lunam7249]

the only place your 8s belong, is in headphones

[@radiospank]

Yooo, DD are cool and sound decent but bro don’t be fooled, they don’t have anything special to them other then that nice dust cap😂 I have had DD 2512, pair of 2510s and pair of 2010s, DD amps etc. you can definitely get more value out of other subs with similar specs and get similar performance. Same with JL, they have great aesthetics and sound but you can find similar spec subs that sound good.

[@dennycote6339]

Coustic bass pump had 2 6s or 2 8s

[@RobotUnderground]

Yes they did. Thank you for reminding me of those gems.

[@ds1919ds1919]

ROFL

[@tidobass6048]

I have to disagree I built a spec for a jlw7 8 and was quite impressed by the output. Sure it’s not a 150db break your windshield but all in all it had good bandwidth and consistent output.

[@lunam7249]

nice headphones, i agree

[@radiospank]

The 8 w7 has a lot of stroke, it can get decently low and really most people like that range well enough. 12 w7 goes even lower and you will really feel that low end which some can say feels muddy or sloppy and that’s just inherent in those frequencies as they are very slow waves. Personally I like woofers to roll off at 40 hz so that I feel the 30 hz but just barely enough. This makes everything feel nice and tight, which is why people prefer 8s because they do this already with fs in the 45hz ranges

[@miscemail2901]

FWIW - I've loved 6 and 8 subs since the 80s. I had a great time building a ton of variations of boxes, etc both sealed and ported. I often would do dual or triple arrays in vehicles because it would fit better and distribute the load out to help prevent individual driver failure. Of course, if you are comparing single sub designs, I was a fan of 10" for best bang for buck.

[@RobotUnderground]

Yes, I'll be building a TON of 10's this year.

[@avac4312]

First time I've seen your video very impressed I like your attitude you tell it the way it is I I prescribed to your station lol good work.

[@ds1919ds1919]

You want the best subs in the world? Patrick here makes them. Im'a back from hanging w/the bobcats..,.

[@atmosphericpressure3560]

That warehouse must be protected at all times.

[@RobotUnderground]

yes, 5 dogs are helpful

[@cliffordjasway6817]

Reminds me of a fall out 3 game good one atmos pressure protect the warehouse

[@dagorodriguez5265]

I recently got my hands on a 8 inch JLW7 and hands-down one of the best 8 inch It sounds amazing I will be happy to let you hear it did 130 DB and the box is only one cubic foot

[@RobotUnderground]

lol. There are LOTS of other choices for half the price and more performance.. Even then, they're still all turds compared to the same motor on a 10" or 12".

[@lunam7249]

oh goshhhhh ...dago....`you ever see those real war videos, where the reporter is talking to a soldier, and asking him how he feels....and the soldier says " ya i miss home , miss my girl, but hey! im a warrior, im fighting for whats right!! i get to visit home in a few months anyway"... and then he walks away....after he gets about a block away...you see from the side an incomming missle going right at the soldier.....and even before the reporter can scream the soldier is blown into a cloud of red and black smoke....... ya... for some reason that reminds me of you.....❤😢

[@lunam7249]

kitten farts do 130db

[@dagorodriguez5265]

@@lunam7249 😂😭 hope you have a great day.

[@lunam7249]

@@dagorodriguez5265 lots of love❤️❤️😸, for reallies sell that Junk Lab.. and get a 12 or 15 from robot....and dont ever brag about JL again ....EVER.... or i will send my kitten over to your house to bitch slap you with his little paws!! come on!! big toyz for big boyz.....

[@gavinmcclure8047]

Lol 8's should be a mid range 100%.

[@RobotUnderground]

12's, 15's and 18's have been used as mids for a long time too in PA.

[@gavinmcclure8047]

@@RobotUnderground learn something new today appreciate the knowledge

[@chrismoreland2983]

Some 8s suck like the skar zvx 8. But I had a single American bass vfl 8 and it sound amazing hit lows even moved a good amount of air for 500 watts and it was in a .7 box. I put the same sub in a bigger box it sounded shitty. So I think it depends on what sub ur using. Some 8s sound like garbage, but others sound good in small boxes.

[@TheHiimrice]

A good 8 should sound good in .5 to .75 ported if it needs more than that it's not a good sub lol

[@ds1919ds1919]

@@TheHiimrice dumb comment

[@lunam7249]

ohhh chris....i cant argue with something that personally happened to you....

[@EvanField6380]

I really like dd 2508s for sound quality

[@justforlaughs8988]

Idk dude I love 6.5s and 8s I've had my fair share and I've always got them to hit hard and low yes the enclosure had to be big but idk know why they just look freaken awesome being so little with a huge motor and long excursion just looks sweet

[@juststuff5216]

I currently have 2 x Peerless 6.5's in a t-line. I've also got my Hybrid Audio I6SW (which is technically a 5.8" sub), which replaced my 12" DD sub! Supposedly the I6SW was rated @ 120 watts, and I had it on a 1,200 @ 4ohm Ground Zero amp, and it handled the power like a champ!

[@indopleaser]

i enjoy these historic woofers. these trend setting woofers.

[@ds1919ds1919]

This is no trend bro, this is what you SHOULD expect from speaker manufacturers. THE BEST. There is no trend going on, people always are looking for a better way to build/design subwoofers, and also a lower cost. You, my friend, found it!!

[@kcmullins6179]

Shit I love my Sundown Xv3 8"s and SA v3 8"s lol

[@RobotUnderground]

Just imagine them as 10's.

[@kcmullins6179]

@@PlatinumEagleStudios lol lack of bass?? I got 2 Sundown Zv5 12"s on a wolfram 7500.1D in my daily. But those Xv3 8"s and the Sav3 8"s hit as hard if not harder then alot of 12"s out there. Just because they are smaller don't mean they can't get loud. A single xv3 8" done over 153 DB in a jeep Cherokee on 5k.... N considering the sa v3 and Xv3 8"s have damn near 4" of travel helps

[@allmotorhash]

that is true i have 2 x8 woofers and they sound so much better in a 3.25 cu ft box

[@RobotUnderground]

lol.. That's a big box for 8's. Thank you for sharing.

[@ds1919ds1919]

I'm assuming it's 3.25 ÷ 2 = 1.625, which is a lot, but for some reason (I'm thinking the spider/surround) they do sound good with larger box volumes.

[@djkeys415s]

Unless you use at least 10 at a time are have no space

[@brianvarnes4803]

yo yo, got a pair of Eclipse sw7124d2's. Feeding them with a crispy clean 1200rms. T9? 3" coil? means they handle without fail, but with an efficiency rated at 80, Will, i get an audible difference if I put a 88-90 sensitivity rating? Thinking of a DeafBonce 500rms sub. Should I just remain gleeful with my old school relics, or continue making ts parameter comparisons?

[@RobotUnderground]

Potato's and tomato's SW7 uses a 3" coil. If you can control the volume to the bass amp, sensitivity is only relative to the highs and you can control the volume to the bass amp, so it don't matter any more. You're not going to get floppy butthole bass with an Fs in the 40's.

[@brianvarnes4803]

@@RobotUnderground cool beans. i'll just keep being impressed with my subs. Thanks for the reply sir, I likes learnin sometimes!

[@swanginfleet]

I've had both large and small subs. Gotta say, I love the small subs. I have 4 6.5s in a 2 cf box and they're really impressive for 600w total rms. Also built a box for (4) 4" dayton tcp 115 (.64cf@34) and those things carry the lows easily down into the 20s and sound great. Small subs have their place in locations where the height of the box is limited imo. You can always downfire but then are limited on the type of sub and who doesn't want to see the sub(s) lol. Overall I do agree though, I would rather use a large sub when possible.

[@RobotUnderground]

Well it's just a better value and you got to pick your demons because nobody's made of money

[@markbarilleauii6337]

I have been running 8's for a long time now. I have also owned 10's, 12's & 15's of many brands. IMO 10's are the best size sub out there, with that being said I love using my 8's. I started back in the 90's with 8" subs. My first SPL/SQL setup was 4 L7 8's and 2 zr1000.1 on each set. The setup was in a Camaro so it did pound. I also tried 10's and 12's, but the 8's sounded and hit so much harder in my car. I also just sold 3 p2 8's from out my crewcab build and replaced them with a single 12" JL w3, that thing has no bass and can't handle sh¡t for power. You saying 8's suck is only your opinion and we know what opinions are like... All subs can suck if not used right in an application with appropriate calculations and knowledge of building a box correctly. Just putting out some FYI.

[@RobotUnderground]

I hear you. We did a box for a client once with 8x 8's and you could really feel the mid bass but no lows.

[@mrbrowz1000101]

4L7 8s and two ZR1000s?? Goodness!!! I bet that did quake something fierce.

[@radiospank]

Bro how you comparing 3 p8s to 1 12w3?! That is an entry level woofer so yeah it has no bass lol. Put in a real 12 inch and then be amazed

[@markbarilleauii6337]

@@radiospank What do consider a real 12"? And the p2 8's are entry level but in a crewcab truck they sounded amazing. The 12w3 just didn't have enough airspace to sound good. Anyway JL is an SQL sub, not SPL. If you want an SPL 12" sub, I would say the new Hutchinson Origin is great. Like I said previously, IMO 10's sound best.

[@markbarilleauii6337]

@@mrbrowz1000101 I think it did a 149.3db. It's been a while since I had that setup and that car.

[@tylerdass-herod3253]

Man i love this chanel, always teaching some good shit about woofers

[@imlurkn5291]

I know the 10" Fi X works in a .5 cuft ported box and handles 1k watts. Thats pretty good

[@valorantorion1588]

Extremely uncommon opinion I see but I like 6.5s they are kinda fun and super small can something bigger do a better job definitely in the same size box probably not I had a friend that had a Extremely small truck mozda b2000 1990s truck he wanted a sub rather than one of those thin ass bass shakers but the 6.5 went between the seats it's a 2 seater there is no room behind the seats the total size of the box was like 1 ish cubic foot port displacement and sub and some small bracing and 45s ended at .4 cubic feet absolutely massive port and it sounded great he loves it now an 8 like a mojo those take 1 cubic foot with like 12 square in or more of port area at that Point I'm going with a 10 they are cheaper sound better and they take the same cubic footage ish usually they are 1 to 1.5 cubic feet ported so thats just my personal take

[@RobotUnderground]

I hear you

[@valorantorion1588]

@@RobotUnderground yo btw this is Kayleb from fb that was talking to you about the soundstream 12 recone but I did want to say I like 6.5s bc I think they are fun to mess around with it's basically taking something that isn't good at being a sub and saying fuck you lol it's the challenge for me how small can I make it and how loud but I'm not a fan of 8s they can be good but I think they are over rated and over priced for what they are 10s are much better they take the same space play lower more cone area Lower fs more motor force usually more excursion and they usually dont cost that much more an 8 and 6.5 are not at all meant for high volume they cant keep up at all with 10s or 12s but 6.5s are just fun that's all it is and they have there uses if I can go something bigger I definitely would though

[@RobotUnderground]

@@valorantorion1588 Well, I'm not a fan of overclocking CPU's either. I'd rather have an ARM processor with just a passive heat sink and no moving fan... That's just me though. I use CPU's for building empires, not games.

[@lunam7249]

the fact he didnt cutout a tube thru the back wall to a bed full of 15s or 18s woofers is lame.....

[@djkeys415s]

I TOTALY AGREE WITH YOU I THOUGHT I WAS THE ONLY ONE felt that 6&8ts was point les

[@damianroberts571]

If your having to put them in much bigger boxes your not using or building the correct ones, I've had 8" subs that played low and sounded awesome for their size

[@RobotUnderground]

Agreed but people seem to think they're magic and are often disappointed at the level of pressure they will make in the first 3 octaves.

[@ds1919ds1919]

Also a factor: in what vehicle? I've done 8" installs in mini trucks (in the 80's n 90's) with 500wrms zapco amps that warped my brain! I've also done other 8" installs in larger vehicles where the 6.5" mid bass units hit harder. Be it from the amp, the amp settings, the resonance of the vehicle, the size of the vehicle (I think it was if the latter two), they just did not perform sometimes. So, vehicle, or even the room in a home, matters....

[@damianroberts571]

@@ds1919ds1919 had 2 8's behind the seat of an 2001 Dodge ram they absolutely hammered doing my 40's on the meter, blew the truck up bought a 1996 jeep zj and put the same 8's in it and they preformed great pulling a 142 on the meter while sounding great yet again

[@TKO_Horticulture420]

So the 4 8s I have in 3 cubes total doing 148's are stupid?

[@RobotUnderground]

Yes because you could have been louder with 10's or 12's.

[@lunam7249]

well i suppose a flea riding the back of my kitten thinks hes in a rodeo....but the rest of the world says....uhhh ya uh noooooo

[@theonewhowas7709]

#HANDYSNOTHATE

[@RobotUnderground]

May St. Peter North bless you my son with thick and creamy ropes of love.

[@brianvarnes4803]

punk rock, indie, death metal.. some of my music. NO rap or hip hop btw.

[@RobotUnderground]

Good for the kick drum.

[@brianvarnes4803]

@@RobotUnderground while thats true, my music doesnt get enough respect regarding frequency output. would you listen to a particular jam if i suggest one? Pure audiobliss with the sub frequencies! It's easy enough to do these days. although I'm still a cd fella

[@brianvarnes4803]

"Old Friend" Disturbed

[@mallorycainjr.1921]

Can you elaborate more on attempting a 4 ohm load for more efficiency? I always had a thought in the back of my mind that if I can get a 5000 watt amp and run the load at 4 ohms which would by the amp put out maybe 2500 rms, then I'd be able to have high efficiency while still getting a good amount of wattage

[@RobotUnderground]

Woofers need lots of volts. They love high voltage. It's what allows them to jump. The 4 ohm thing is just a trend I've been seeing from younger people. Younger people tend to have greater OCD as well though. They want to experiment and think that they're unique. For best results, it's always great to just use the amp to as close of an impedance that the maker recommends. It's always safer to go up, not down in impedance.

[@cartycartyamplifiersalesrepair]

Wow first time seeing your video great I would used some of those speaker frames keep up the good work 👍

[@RobotUnderground]

Start finding clients you can help

[@Jackmerius_Tacktheretrix]

Unfortunately with the vehicle I drive I am stuck with 8 inch subs. I have four of them and they are very unimpressive despite having over 1200 true, certified watts going to them from my JBL mono amp. Trying to figure out what to do for more sound. I am currently running four American Bass XD-844s on a JBL 1001ez.

[@RobotUnderground]

Sorry to hear that

[@RobotUnderground]

Only one thing to do. BLOW THROUGH

[@Jackmerius_Tacktheretrix]

@@RobotUnderground thinking of gping with two more efficient 8s to give each sub more space. The kicker q class are appealing but way too expensive in my opinion. Ive heard two of them and they absolutely slammed but I really think I could do better for at least half the price. Do you have anything by chance? I know you hate 8 inch subs 😆. My only other option is downfiring shallow 10s and those that ive heard just really seem to fall off below 40hz.

[@RobotUnderground]

@@Jackmerius_Tacktheretrix Yes, I'm making some triple stacks now for $200 each shipped.

[@1ohmwrecker]

Yes, thank you! They suck! In 100% of circumstances lol.

[@lunam7249]

99.99999%

[@mikeboz4444]

Well damn, there goes that idea.. lol Super tight on space, so either isobaric my 15s or be a potato head

[@RobotUnderground]

There may be other solutions. Text me direct for best results. 6023126504 Let me know your design goals and equipment you're using. Budget helps too.

[@paulbronson5781]

Big bro.. I respect your intellect. With that said,what is a good quality 12 in sub you actually like? Was going to go audio legion but they're pretty much out of buisness. Heard you say something about soundstream.. just want to know if there a solid 12 out there that you think is all around dope.

[@jordanciaramitaro6351]

I have always wondered this but never actually compared. For example I have 5 JL 8w1v2 which equates to approximately 40”s of cone area, would I get more output and or frequency response with 4 JL 10w1? Insert the driver of your choice in place of the 8w1.

[@RobotUnderground]

That's the old, "Turd Sandwich vs Douche", argument. Best to just sell them to a JL fanboy and pick something else. W1's don't have much oomph.

[@sethh8892]

@@RobotUnderground Wonderful southpark reference😂

[@GENEGAUSE]

Look up a cone area chart comparison. Cone area is king

[@lunam7249]

set them on fire or give them away??.......hhhhmmmmm thats a tuff question....i would give them away...not to your enemy but just somebody you dont like would be fine...ask them to never talk to you again and i think you both will be about even for the trade

[@lunam7249]

@@GENEGAUSE your definately confusing a wall of 18s VS dogshit 8s or 10s

[@derrickpfannebecker6131]

What's your take on the "smart" Brazilian 3k? Really peaking my curiosity..

[@RobotUnderground]

Well you have to ask yourself why they think their other amps are, "dumb". Brazilian designs tend to be without good protection circuits and very fickle about power and impedance loads. I was dumbfounded at the first review I watched Big D Wiz perform. In real life though, we've found the smaller amps to be noisy and the bigger amps to have the problems I listed above. I do think it's great that they added a small analog computer on board to help with the problem of 1 ohm vs 2 ohm. Nobody's really talking about the fact that a boring, traditional class D though does virtually the same power at 1 ohm or 2 ohm anyway.

[@derrickpfannebecker6131]

@@RobotUnderground that's why I asked... I heard you mention that about 1-2 ohm on class d's

[@RobotUnderground]

@@derrickpfannebecker6131 They seem like a good value. Just make sure you have a stout electrical system.

[@ds1919ds1919]

It comes down to how much power (P) you can supply to the amp. Car alternators deliver their rated current and that's it! Don't expect more from your cheap Brazilian amp than what your alt delivers. Wiring is a major factor too.

[@cyanidebill]

I had a pair of hifonics 8” or the old clear infinity 8”( I can’t remember). I over built the box and I got a lot of compliments on them. I ended up selling that setup and going to one of the old red mtx12’s( I think you talked about them once). I haven’t heard any of the newer 8’s I just assumed the technology had come along, they push them enough. The real question is do you have any funky pup dust caps? That’s what I’d put on the gonzo 7k.

[@RobotUnderground]

Just the Urban. No FP's

[@twinsoul7114]

I want some speakers reconed how much db drive wdx g1

[@twinsoul7114]

12s

[@seanjohn5869]

8s slap.

[@RobotUnderground]

Yes, they hammer but now lows like Bose.

[@RobotUnderground]

@@PlatinumEagleStudios I hear you. I want to use like 4 of the modules in my old pickup truck. That'd be like 16x 5.25" woofers

[@RollingThunder85]

That’s so true my girl was miss teen Missouri in 2004 and she’s crazy as FUK

[@RobotUnderground]

Super cutie though I'm sure.

[@10krms8]

Wt u think of the emf bannhamers v2 12s at $350 ship with a 4” coper coil rated at 3k rms

[@RobotUnderground]

Sounds good but what about warranty? Can you get parts in the future? Share the link.

[@danielwarbucks2469]

Omfg you are so on the mark with the beautiful women getting their way till they don't amazing life lessons and sub info like Tony the Tigger would say GRRRRREEAAATTT!!!!

[@kraigfuller1093]

Can u hook me up w a rebuild on a pair of spl170's

[@RobotUnderground]

Text me the gap dims, 6023126504

[@noelsantiago3159]

Love your videos thank you for all the info!!! If you have a avatar 12in sub stu- 1246 d2 would LOVE TO HEAR YOUR INPUT ON THAT SUB. For the money is it good? Or is there a better sub for the money? Looking for good bass shaking sound. Thank you!

[@RobotUnderground]

It'd be a much better buy at half that price. That's all. It's not that other brands make bad subs. It's just that they cost too much. That's one of the reasons why I started building my own.

[@fuckgoogleandyou8779]

Just go gonzo for the real win

[@noelsantiago3159]

Thank you for the reply!

[@cliffordjasway6817]

Damn haven't seen a rat speaker in a long time u speak the truth people hate it honest to the core 🤜🤜🙏🙏🤣🤣

[@JeffAdairKTM530]

Have you tried the SD4 sundown 10? I have them in .6 due to my space issues in my tacoma. I could run one 12 in a 1.2 or two 10s in .6 each.

[@RobotUnderground]

Nope. I do wonder why he bailed on the v3 though.

[@JeffAdairKTM530]

@@RobotUnderground I heard that the v3 had coil jump and bottoming out issues when pushed to hard and it was causing to many returns. The SD4 was designed to combat this. I havent been able to get alot of bass in my truck until I put three of these 10s SD4 in the back with .6 sealed. I dont really want to do a blow through but maybe one day.

[@RobotUnderground]

@@JeffAdairKTM530 Yeah, the steel is what's valuable to me at this point. Glad I bought a bunch of dead ones.

[@troydefond2307]

question. how do I find the right box size my woofer needs using the small parameters.

[@RobotUnderground]

They're all about the same. The TSP's are a good guide but not the end all for box design. I can help you here if you want to post the parameters.

[@troydefond2307]

@@RobotUnderground Fs: 30.3Hz Qms: 5.59 Qes: 0.39 Qts: 0.37 Mms: 291.5 gr Cms: 0.09 mm/N Bl: 23.9 Vas: 29.4 L Xmax: 24.5 mm (One-Way)

[@RobotUnderground]

@@troydefond2307 So for best daily response, is .95 to 1.3cf tuned from 32hz to 36hz.

[@troydefond2307]

@@RobotUnderground thank u. I appreciate it. can u make a video explaining how to do that. the company said 1.5-1.75. it's a wolfram audio silver series 10" I thought it was a bit to large. appreciate it again

[@RobotUnderground]

@@troydefond2307 You can go bigger but then you start to lose response / attack and power handling. I doubt the Fs is that low. You should test after break in.

[@TheTherealdarkhorse]

In pickups you can be very limited. DD Audio 2508 and 1506 front firing actually sound pretty damn descent. No possibility of using any respectful tens down firing when you only have 4 inches depth. Even then the surround eventually slaps the floor destroying the ten. I've had pretty descent success with these subwoofers when the customer refused to give up any seat area. and in most cases you are limited to 2.5 inch seat risers. I have fabricated 3 inch rise and 3 inch forward seat brackets which actually gives you descent airspace for front firing 6s and 8s to breathe. I'm just partial to DD 6, AND 8 American made woofers. They want to pay to play who am I to say no. They hit hard and sound really descent. Box is the major factor and using multiples. Gonna have to agree to disagree on this one. You do what you can with the parameters given.

[@theCybe]

pups

[@FriedTwinkies]

Jensen 12 baby! haha

[@666nacirema666]

epic 8 was ok. also those soundsplinters from way back too the 6 ohm ones iirc. ive found that most cheap 8s can do just as well as the more expensive ones just gotta do a qc check. seen several have glue joint failures on the cheaper ones but seriously ive tested a number of 25-75 dollar 8s up against some 250 dollar ones and the gains by spending so much more in the end really isnt worth it imho. lanzar dct 8s did great i think i paid 28 dollars for them off of ebay

[@666nacirema666]

thilo had something to do with every decent 8

[@RobotUnderground]

For midbass impact, YES, I love 8's for that. We did 8 of them in a ported box for my buddy and it was like a gorilla with a sledge hammer.. But it didn't play deep lows like he wanted. We used 8's we got for MCM on closeout. They were like $10 each shipped.

[@angstyxxo1232]

Laughing right off the goddamn beginning with you explaining your figure of speech 😂😂

[@2011joser]

I prefer 8’s but I am definitely not an spl guy. I started back in the late 80’s and chose them because I preferred their accuracy more than deep bass from larger woofers. I agree that 10’s are the perfect compromise. From four G&S Redlines in an infinite baffle set up in the 80’s to two Image Dynamics ID8’s in a sealed box today, their sound has always satisfied me.

[@abelscaliber7969]

Lmao there’s no such thing as a sub size being more accurate than another A sealed 15” sub is more accurate than a 2cu ft ported 8” tuned to 40hz 🤣

[@Jackmerius_Tacktheretrix]

@@abelscaliber7969 an 8 in a ported box tuned to 40hz would have crappy low bass but it wpuld be pretty punchy. Good for rock and country, thats about it. I prefer sealed enclosures myself. Much flatter frequency response and not so peaky and not such a limited range like a ported box.

[@2011joser]

@@abelscaliber7969 your own post negates your argument. Tuning to a specific frequency is either compensating for a deficiency in the woofer or an overboost of that frequency. Why do you think spl guys build multiple midbass drivers into their systems?

[@abelscaliber7969]

@@Jackmerius_Tacktheretrix this is true

[@abelscaliber7969]

@@2011joser it proves my point that the size of the woofer doesn’t determine accuracy. You can make any subwoofer sound accurate. You can make any subwoofer sound boomy and muddy. It’s 90% box

[@donellis5005]

What you sell boxes??

[@RobotUnderground]

Just locally but Recoil is bringing back flat pack boxes. They started the Fierce brand for Best Buy and they were doing those boxes. We'll be reselling those though. I really want to provide birch flat pack boxes for cheap though. People still pay way too much for those.

[@donellis5005]

@@RobotUnderground tell me about it cuz I paid 300 for a flat pack glued and screwed kit for 2 12s

[@RobotUnderground]

@@donellis5005 Well I hope you learned your lesson.

[@administratorperson3272]

Jensen s.l.a.p. in a 12

[@RobotUnderground]

The hand print one? I loved mine on half of a Rockford 4600X

[@administratorperson3272]

@@RobotUnderground yah. There are a few notable historic drivers that ought to be replicated. But thats why i have a hoard of a/d/s/ because Rom has soft parts, and i love the flat new england aka 'boston' sound.

[@christopherparis6841]

Feelings the same on 8s or 6.5s like cool but i dont need tv speakers lol. Just found ya not long ago n ill tell ya your knowledge vs these clucks selling their shit only.... F that. Ive been to china on ali baba n id rather pay you. For two reasons keeping it real as f and your experience trumps the amazon n sonic n ya you get it. Might you have any opinion on square coils? Also is a flat wire coil much better or no diff? Hopefully ill hear from ya.

[@RobotUnderground]

Like square subs, they're just a gimmick. Magnetic fields are as round as it gets.

[@lunam7249]

hahahaha👏👏❤️🥇🥇❤️🥇ohprahs a potato!!!!

[@RobotUnderground]

Potato head.. Yes.

[@danielhardiman4707]

Unless theyre the old w6s from jl theyre pretty awesome

[@RobotUnderground]

lol. One of the reasons that companies don't bring back old designs is that you will be disappointed. It will reveal how much they were snowing the customer then and now.

[@TheHiimrice]

My 8s play down to 25 hz happily and I still have plenty of room for activities in the trunk 4 8s in 3.5 cubes gross don't want any bigger subs haven't even heard any bigger subs sound as musical and I've had em all 🤣

[@asherdie]

No you haven't.

[@TheHiimrice]

@@asherdie lol ok bud you're the goat I guess lol

[@kristopherdonaldson9569]

I second the Hiimrice... I have 2 DD508's in a 2cuft. ported box that is extremely musical, and drops hard. Most think I have a couple 12's. Granted their in the back of a dodge magnum, so I'm definitely getting some cabin gain. But in the right setup, 8's kick ass.

[@TheHiimrice]

@@kristopherdonaldson9569 nice my coworkers thought I had 2 15s lol 4 sundown e v6 8s are doing some major work in the trunk of my impala lol

[@asherdie]

@@TheHiimrice don't be butt hurt I called you out.

[@erik120719]

Hmmm last setup was 4 soundqubed hds2.108s in 3 cubes with a BUNCH of port area on 3k, sounded alot better than most 10 and 13 setups I've heard...very very angry...still no replacement for displacement! Went 3 15s on 8k, almost went 12 of the hds2.108 8s instead. 8s have their place , but don't sleep on em or ur the idiot for sure. I remember when I started installing in the early 90s and if u had 8s it was a list ditch effort cause NOTHING else fits!

[@lunam7249]

your story started sad.....and i kept reading hoping for a happy 18s ending...but no, your story just kept getting sadder and sadder like netflix film about a serial killer or something

[@lunam7249]

8s have their place when my kittens need headphones😹😸😹

[@erik120719]

@@lunam7249 ur funny , I been doing this since before u were even a sticky load in ur mommas axe wound. Probably been thru and installed more systems than u have dreamed about and seen online. 8s for sure have thier place. A good 8 can now be very aggressive in the low 30s, used to be u needed 15s or 18s to play that low. The 4 8s I had on 3k were tuned at 32hz , played solidly down to 27hz and are still doing it in a buddies truck. I ONLY bought 4 8s bc I intended to keep a rear seat and put these under it, which never happened. Ended up 3 15s on a 8k then switched up to a rp4500 at .66 ohms bc taramps sound like butt. We all have different ideas on how much room we wanna give up in a vehicle for bass. Not everyone is 18 and only needs 2 seats in a SUV bc they wanna fit 4 18s. I promise ya u wouldnt scoff at those 4 8s and think it was garbage if you heard them, but if I would have put them under my rear seat and still had all the room of the rear seat would have ALMOST kept me satisfied, but since I didnt want to gonfiberglass to make enuff room for them, said F it and put in the 15s.

[@lunam7249]

@@erik120719 i the emminent great world leader in audio that i am with at least 3 car installs under my belt....will give your comment a full 1 point out of a possible 10....1 point for your correct determination that taramp amps have problems......everything else was .....well....it fades off into the sunset....as i said ...my kitten farts louder and cleaner than your 4x 8s.... uh...1.5 points....0.5+ additional point becuase ya fiberglassing is a bitch.....so in conclusion 1.5 points out of 10.....but wait you brought my momma into it...so you lose a point....so 1.5 points minus 1 = 0.5+ points out of 10....come on eric...i was secretly rooting for ya....

[@lunam7249]

eric you included the number 13.....i hope to god you were not going to brag about installing a JL(junk laboratory) 13W 7 into some install....i would be ashamed of that...i mean not that its TOTAL garbage....( im mean if the baby stork dropped 1 off on my doorstep i would keep it long enough to sell it on ebay)....jus saying...i would be ashamed i sold someone a 13w7 and then raped them further by charging them to install it....

[@jayone2918]

#HANDYS 😂

[@edud8452]

Do you have your stickers made or do you make them? 8s are for doors 🤣🤣

[@RobotUnderground]

Agreed. 8's are great for midbass. Yes, we have decals for free, just pay the postage or like they'd say in the skateboard magazines, SASE, Send a Self Addressed Stamped Envelope to: Robot Underground 720 W. Southern Ave. Mesa, AZ 85210 You can also just make a donation via Square's Cash App. In fact if you haven't signed up with Cash App, you're totally missing out on some great services. Sign up with this link and get $5 FREE: cash.app/app/ZNPCGGG

[@ds1919ds1919]

No! Not always for doors bros! 8" midbass are good for doors, but 8" woofers (not subwoofers) are very musical, even in a car. Depends on the car, and also the stereo system installed too, though,.,.

[@lunam7249]

@@ds1919ds1919 your right...doors OR headphones for kittens!!!😺😹😹

[@artureremyan2537]

hloo

[@BeatsByThePound]

Bro you got a bad rap for real. You make yourself look bad posting these

[@matthewguynn3652]

Lol my next feed is a actual box builder who doesn't brand bash making 2 8s sound amazing.. sorry but I've watched alot of your content and I've heard tons of wrong information.. but hey it's your channel

[@RobotUnderground]

Please, by all means correct me.

[@RobotUnderground]

Most of what I publish is simply my opinion though and based on my experience.

[@matthewguynn3652]

I understand that.. I been doing car audio for years as well.. you obviously have a good channel.. and any support is better than none . I just feel like it's better to support rather u have 8s 10s or 18s..

[@matthewguynn3652]

Also some of the brand bashing .. ex.. u bashing the Boston 555.. I happen to own that sub.. I also own Rockford. Orion, American bass etc.. I can personally attest to this sub . 17 yrs ago. was a neo sub.. had 3 3/4 excursion.. 3.5 voice coil.. 2k max.. and 91 sincitiviy.. when nobody had such numbers.. just saying I have it playing as I type so??

[@matthewguynn3652]

No offense to you bro.. thanks for doing car audio post period👍