How to set Crossovers

In this short how-to I show you how to set your crossover with an inexpensive tool.
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[@Noname-td7bi]

I like this guy bc he keeps my adhd entertained

[@DIYAudioGuy]

Glad you liked it.

[@MrOkcyurwin]

The same reason I'm here😂😂😂😅😊

[@LetsGoECU1]

youre the man DIY Audio guy. I like how you have an entirely separate video for the different slopes that way people do not have to skip around and can just watch

[@DIYAudioGuy]

The crossover videos have been very popular. I suppose I need to make a few more of them.

[@LetsGoECU1]

@@DIYAudioGuy For sure! Prior to this video I kind of just went with 24 db/ octave and set the filter on whatever the range limit is. My amplifiers and head unit both have crossovers and i wasnt sure at a point weather or not to use both or just pick and choose one. Maybe make a video requesting for viewers to leave frequently asked questions in the comments and choose the ones that occur the most to do a video on. Either way 3 of my issues I thought were something else were all solved fro. this vid so thanks alot. Youre out here doing gods work Haha

[@dontyhorton1566]

Love your video you are a huge help thank you keep putting out this content

[@DIYAudioGuy]

Thanks, I will.

[@HifiVega]

You learned me something today! Good video

[@DIYAudioGuy]

I suppose you can teach an old dog new tricks.

[@nathan90s]

Yes ... Yes I was looking for this video for long time ... Thank you.

[@DIYAudioGuy]

Enjoy

[@carlosesparzavazquez4753]

Thank you so much . Your videos are simple and straight forward unlike the other you tubers, they explain so much 😂

[@DIYAudioGuy]

Thank you!

[@chadcurrent1645]

I like how detailed your videos are and how you explain everything. As for setting crossovers what I'm missing is where do you get the target frequencies? Otherwise say you have a pair of 6.5 door speakers for instance where do you find your high pass frequency so you know what to set your crossover to? Same thing on the subwoofer lpf.

[@DIYAudioGuy]

80 hz a good starting point. Set it there and see how you like the sound. If you're not getting enough mid bass from your 6.5's then you can try setting it at 100. The idea is to get the sub and mid to blend.

[@hzm011]

Wow good video, thanks

[@DIYAudioGuy]

You're welcome!

[@MrBedrock82]

@DIY Audio Guy, you're videos are wonderful. I have a question for you though...I have set the gain/sensitivity on my 4 channel amp and when I attempt to set the HPF (running mids and highs) the voltage reads 0.0 V with frequency turned all the way down. Now what?

[@DIYAudioGuy]

That's odd! What test tone are you using? If you're using a 40 or 50 hz tone that might happen.

[@kubaz2308]

Thanks for the video! Also really loved the one with how to set gains, finally someone explaining every single of details. But how do I know what the crossover slope is for my amp? I can't find it anywhere - its Crunch GTX 4800 used in 2 bridges mode. Can you help me out with what my numbers should be?

[@DIYAudioGuy]

If it's not in the manual or the manufacturer web site I would not know.

[@kubaz2308]

@@DIYAudioGuy alright thanks, gonna keep searching... But thanks for the videos, they're very helpful and also thanks for a fast reply! Keep up the good work man

[@ivansmoljan-zmajo2162]

@@kubaz2308 hey did you find out i have same amp

[@user-st1kg4wv9w]

Hi my friend I want to ask something I have 14.8 voltage in my 1 ohm amflifier what volt i must have for that to my output?

[@anak_bungsu6933]

@DIY Audio setting gain dulu atau crosover dulu.dalam penyetingan lpf dg nada 80hz gain apakah diturunkan

[@yasmagicals]

Thanks again for responding in the comment section of the other video. I was trying to set the Lo Pass (turned to it's highest point during gain setting because no off switch) but couldn't hit my target voltage. Gain was set with 50hz, 400RMS @ 2ohms. √800 is about 28.3. I left it there. Set the tone to 80hz and got 33.0 readout. 33 x .251 is roughly about 8.2/8.3. There was absolutely no way I could get it to drop that low. The lowest it would go was about 25/23. Any idea what I was doing wrong? At the end of the day, I'm gonna use the head unit and have the x-over at 80 or 100. But, I want to make sure that the inability to get it to 8.2/8.3 isn't indicative of an important miscalculating or incorrect setting elsewhere. Thanks again!

[@VincenzoCavarretta]

.501

[@A6Legit]

Great to know. Ive always just eyeballed it 🤣

[@DIYAudioGuy]

Glad I could help!

[@dbwiskus]

Is there a specific volume on head unit to use? Can I use the "3/4" volume I did for setting gains? Love your channel btw!!

[@DIYAudioGuy]

When setting crossovers I typically adjust the head unit so that I've got around number to make the mat easier. So if the amplifier is putting out 10 volts with the crossover turned off the math gets to be real easy.

[@dbwiskus]

@@DIYAudioGuy perfect. Thank you for responding

[@josuetobar1196]

If my amp for my mids and highs uses a 6db octave . Do I use the .501 to multiply with my unfiltered voltage or is .501 only for 12db octave? I’m sorry if this is a dumb question. Edit* just found out you have another video dedicated to setting crossovers that had what I need. Thanks for the awesome videos you are a awesome teacher.

[@DIYAudioGuy]

It's a great question. Crossovers can be very complicated. Let me know if this video helps you any: kzbin.info/www/bejne/gYbZe4GeeJJ1d6c

[@gd6315]

Bonjour je voudrais vous poser une question, Comme le réglage du crossover modifie la tension je devrai régler le crossover avant le gain ?

[@DarthObscurity]

Think you should do it by ear first and then test tone with meter and balance between the two. What sounds good for you won't be the same for me and it has a lot more to do with that then 'matching voltages' or w/e. The difference between learning on the ground and learning from a book, I guess?

[@josephbassil4171]

Hi, You have helped me out in the past. I’m having a issue with my o scope. I getting a wave however the wave look Kind of squiggly even when I’m not at medium Volume. Can this be a rca issue?

[@DIYAudioGuy]

That's one of those things I really can't troubleshoot unless I'm physically there.

[@antigravity420]

By any chance, would you happen to know the gain on that Rockford amp? I just bought it and I'm waiting for it to come in. I figure since you have tested this amp, you probably know the gain number so I can set mine with a multimeter. Thanks

[@DIYAudioGuy]

kzbin.info/www/bejne/g3PGeIKlh69niNE

[@davidrico4859]

If I have the LPF and subSonic on my sub amplifier set just the way I want it but then I make changes to my speaker amps hpf and Lpf do I have to go back and Adjust my sub amp.

[@DIYAudioGuy]

Not necessarily. If you're happy with the sound you don't need to make any adjustments.

[@pitikidbb2284]

Do I use 80hz always?

[@BlackEyeCustomAudio]

If your running a DSP, what do you set your crossovers in the app vs the amp? Thanks

[@DIYAudioGuy]

Some people will recommend that you sit across over at the amp and the DSP that way if the DSP doesn't work properly you won't smoke your tweeters. I always just risk it and use the DSP for everything.

[@cablenowadays6586]

i have a 5 channel amp and the 5th sub channel had a Low Pass and Subsonic filter do i set low pass the same way? and subsonic the same way just playing a subsonic frequency or what my box is tuned to?

[@DIYAudioGuy]

Here is information on how to set the subsonic filter. It is just a little different. kzbin.info/www/bejne/n4i1oHyepJx0bcU

[@scottorsbon608]

I'm building my first full system and I'm trying to learn how to set the gain ad crossover settings. My question- If the Head Unit has complete crossover settings, should I set the settings on the stereo and leave the Amp settings flat or vice versa?

[@DIYAudioGuy]

Go with the head unit since the head unit is going to be a lot easier.

[@scottorsbon608]

So if you set the equalizer on the head unit, the Amp all needs to be turned down, correct? One or the other

[@DIYAudioGuy]

Set the gain on the amplifier first. Then leave it alone, never touch it. then make all of your adjustments with the head unit.

[@akinney9]

Running a new R2-1200x1 Powering (2) P3D4-12 subs wired for 1 Ohm load (using A and B channel separately as I was told the amp is internally bridged). I also have the Epicenter which feeds the amp. The Epicenter is fed a 5V signal up to 350 Hz. When tuning I left the Epicenter completely off and utilized the C.L.E.A.N. lights on the amp to tune. Sounded like crap at first. It seems that the amp alone doesn't drive the speakers very well, then if I add in the Epicenter it clips or I have to back the amp way off then turn Epicenter up to find the "sweet spot". Frustrating. What am I missing? Sealed enclosure with each sub in it's own compartment.

[@DIYAudioGuy]

That sounds frustrating! Honestly not sure what to tell you. How about if you use the multimeter to find out where you get 5 volts from the epicenter? From there you can set the game on the amp. You might need more than a multimeter to do all of that properly.

[@memelorddavid2938]

Where's your bass van??? Yeah I bet you can guess where I came from 🤣

[@turboduckhead6179]

What if it sounds like shit?

[@DIYAudioGuy]

It's for sale, you need a 17 year old van?

[@viqashussain4394]

My vibe lanzer 2102n doest have a bass boost db pot, it has level, lpf, hpf, full-lpf-hpf, and a bass boost switch.

[@DIYAudioGuy]

👍

[@romans116notw]

Should my eq settings on my head unit be flat when doing this??

[@DIYAudioGuy]

Yes

[@rock-kennychristie8165]

Question . I have an idea but not sure I already have a mono amp for bass and a 4 channel for mid and tweets . Planning to use horn speaker for topend. will I need a next 4 channel amp ?

[@DIYAudioGuy]

I'm not sure what you're trying to do. Are you playing to run a mid-range plus a traditional dome style tweeter plus a horn tweeter? I really don't think the extra tweeter will do you much good.

[@rock-kennychristie8165]

Thanks much

[@saleemhoosen2236]

Should the volume on the head unit be at max or 50 percent? What do you recommend?

[@DIYAudioGuy]

for saying the crossover is the volume you should not matter, you just need to be high enough so that you can read the voltage. what I like to do is turn the volume on the head unit up until I get a nice round number so the math will be easier. So if you're reading 10 volts with a multimeter you're just moving the decimal that makes the math very simple.

[@saleemhoosen2236]

@@DIYAudioGuy thank you so much

[@VeritasEtAequitas]

But how do you decide what frequency yo roll off at?

[@DIYAudioGuy]

Like, what the crossover point should be? That will depend on a lot of things. Size and location of the drivers, your own personal preferences. Most people always start around 80 Hertz and then adjust it for sound quality.

[@ittotaq]

How do we know if we have a setup for high or low crossover frequency. Is it by choice or the equipment we have? Nobody really tells you but explains what crossovers are and do.

[@DIYAudioGuy]

Do you mean what frequency to set it at or do you mean when are you supposed to use a high-pass versus a low-pass filter?

[@zonvanzon]

Hey man nice video but I think that if you adjust your maximum voltage at 80hz and then you go to adjust your lpf to the half voltage, according to your Amp 12db/octave you will set the maximum power to 30hz as the next octave is 80hz. It's a mess I think so please clarify this adjustment. Thanks

[@DIYAudioGuy]

kzbin.info/www/bejne/gYbZe4GeeJJ1d6c

[@badrealamhakeem2083]

hi i have installed 2 pair component for mr stock head unit. steg MLG65C in front 75rms steg LEO650c in rear 70rms amplifier infinity reference 3004A plz tell how set my gain level and HPF an LPF so that i can get the best sq sound from my component i am using high and low conveter for my stock head unit

[@DIYAudioGuy]

It is difficult to cover everything in a KZbin comment. Most of the time you would set the crossover cut off at 80 hz, but that is not always best. Ultimately you have to adjust it until it sounds good to you. For the gain check this out: kzbin.info/www/bejne/g3PGeIKlh69niNE

[@thatizzy24]

Would I have to set my freq. hz when switching to all pass filter ?

[@DIYAudioGuy]

Nope

[@rudydaberry122]

If I have a component set with a woofer and a tweeter with an inline crossover, what would my low pass filters and high pass filters be set at?

[@DIYAudioGuy]

If you mean the crossover point between the subwoofer and the component set, I usually go with 80 HZ. And then change it if I think it needs changing. As far as the crossover point between the mid-range and the Tweeter, without knowing which components that are using, I can't answer that question.

[@danieljohnson6663]

I have a 5 channel amp 4 x 100 and 1 x 500. Would I calculate my specs separately for each side? Meaning do the 4 channels together and then do the mono side by itself to get the gains and crossovers set? Thank you!

[@DIYAudioGuy]

You probably have three sets of controls, front, rear and sub. So set each on separately. For the front and rear you will have two channels, right and left, you only have to set it up for one of the front channels and one of the rear channels. Hope that makes sense.

[@danieljohnson6663]

@@DIYAudioGuy Thank you for the response! Yes that is correct on the 3 sets of control. What has me stumped is getting the targeted voltage for the gains. I’m also not sure how to determine what ohm load the amp is producing because it’s 2 and 4 ohm stable. Suggestions on how to figure that out? That way I’ll know what to multiple the wattage by and then take the square root, correct?

[@DIYAudioGuy]

@@danieljohnson6663 The ohms are based on the ratings for your speakers. Almost all car audio mids and highs ( tweeters, mid-ranges, component sets, coaxials ) are 4 ohm. For the subwoofer There is more flexibility. You will probably need to wire it to two ohms to get the full 500 watts. You do that by getting a single subwoofer with a pair of four ohm voice coils and running them in parallel, or you could buy two four ohm subwoofers and run the subwoofers in parallel.

[@danieljohnson6663]

@@DIYAudioGuy Thank you very much! I love your videos, so please keep them coming. Merry Christmas!

[@SK-or9bo]

Where does the power factor number come from? Is it always half?

[@DIYAudioGuy]

That will depend on the slope of your crossover and the type of crossover More details here: kzbin.info/www/bejne/gYbZe4GeeJJ1d6c Those numbers should be accurate for a Linkiwitz Riley crossover, I'm still trying to sort out how that differs from the other types of crossovers.

[@TheLILWITEFITZ]

Dude where were these videos when I was spending 8 hours in the sun trying to hook my shit up😂😂

[@anthonysandoval965]

What if i have tried over and over again to find ANY information on my amp but have not had any luck in the 5 yrs ive owned this Sluger Sl 1200.2 its a decent amp judt no information available. Can you please advise sir?

[@DIYAudioGuy]

You will need an oscilloscope since you don't have any data on the amplifier.

[@xsmatt81]

but for crossovers..ahh yes last comment was for other video. so long as your speakers are unplugged while setting xover with DMM leads in amp, it shouldnt matter what db level you use to match tonehz to voltage to find accurate xover setting on the amp if your head unit has a good xover selection, i would just use that to over ride the amp and turn the amp xover either OFF or the freqnecy all the way clockwise on a sub amp. otherwise run the amp xover if HU lacks much xover control. I run my amps xover over since it has a built in 24dB slope ( 75hz) and my mids/highs off HU amp for more control...

[@DIYAudioGuy]

Modern head units do have excellent crossovers. Enough for most people so they don't have to mess with it at the amps.

[@user-ht2ct9gr3v]

What if it Frequency Response: 10Hz-20KHz ?

[@mbdee6712]

Hi, I had a question with the info my amps specs are giving me. When I look at the crossover info it gives me this -12dB/8ª. I’m not sure what this means. Any help would mean a lot got this amp for Christmas and trying to get it right.Thanks

[@mbdee6712]

It’s a TARAMPS smart 3 if it helps

[@DIYAudioGuy]

That's probably 12 decibels per octave. Eight raised to a must be some kind of notation for an octave.

[@mbdee6712]

@@DIYAudioGuy thanks a lot

[@mrfizch]

Do you need to set your headunit to 75% volume like you do to set gain?

[@DIYAudioGuy]

No. I set the volume so that I get a nice round number, like 10 volts, just to make the math easy. I mentioned that in another video, I think it was the subsonic filter video.

[@L1LPatstylin]

If i cant reach target voltage after applying the math and turning my LPF knob down what does it mean?

[@DIYAudioGuy]

You probably need to try a slightly higher volume on your head unit.

[@riven1062]

My amp is built into sub package. It only has a butterworth 50 to 200 low pass crossover. There is no option for full range. How do I set the crossover to 80 without having the unfiltered voltage?

[@DIYAudioGuy]

You will have to adjust that one by ear.

[@PuresDen]

What if my crossover slope is 24db? What voltage factor do i multiply by?

[@DIYAudioGuy]

kzbin.info/www/bejne/gYbZe4GeeJJ1d6c

[@billyjarvis27]

Does it matter what the volume is set at on the radio

[@DIYAudioGuy]

It should not, as long as you are not clipping. I like to set the volume so that I get a nice round number, like 10, that makes the math a lot easier.

[@lolllllll]

do you have to play the test tone while you set the voltage?

[@DIYAudioGuy]

Yes, It is not a pleasant sound, and he could damage your speakers, so I always unhook the speakers when I do it.

[@lolllllll]

@@DIYAudioGuy thank you for the response, very much appreciated! 🙏

[@user-eo7vk5un3h]

What would I multiply unfiltered voltage by for 24db?

[@DIYAudioGuy]

kzbin.info/www/bejne/gYbZe4GeeJJ1d6csi=9-cxri1v39DnHlsX

[@putster47]

What if you have a Bluetooth amp

[@stephentroutt8725]

So what was the point of setting the gain to 24.5 volts if you are gonna set the lpf down to 10 volts?

[@DIYAudioGuy]

The two voltages are set at different frequencies. The lower voltage at the crossover point is how you know that the low pass filter is filtering.

[@krushanapatil466]

Hello sir, please help me.my speaker crossover setup (all speaker polk audio, av receiver marantz sr6015) Polk audio- Tower speaker RTI A9 30HZ-26KHz - Surround Speaker RTI A1 50HZ '27KHZ - Centre speaker CSI A6 45HZ 27KHZ- Dolby atmos speaker RC 80I 35 HZ 20 KHZ Subwoofer- 660wi Lower and Upper Audio Quality -3dB Limits 25 Hz → 125 Hz (At which crossover should I set each speaker?)

[@DIYAudioGuy]

Try 80hz and see how it sounds.

[@Lu1s1005]

My jbl a5055 has a 12db/octave cross over. How do I know if its a buttersworth or a linkwitz. Other sources say to still multiply my .707 even if its a 12db

[@DIYAudioGuy]

Unless it tells you in the manual, I don't know of a solid way to know the difference.

[@CRM250]

I am happy with my CC1 from SMD TOOLS. Easier and very good. I recommend it .

[@DIYAudioGuy]

You're paying for the ease of use, I call it the math tax. No need to do any math just plug the device in and all the instructions.

[@andrerizan9453]

What if there is no slope mentioned in amp specs? What about the db slope used in a dsp? 🤦‍♂️

[@ady-bdavid1173]

Is it best to set to set your head unit flat when doing this?

[@DIYAudioGuy]

Yes

[@ady-bdavid1173]

Is it best to leave it flat and tune the amp only? Or do u recommend tuning the head unit as well?

[@giltyal5912]

What would an 18db octave number be?

[@DIYAudioGuy]

kzbin.info/www/bejne/gYbZe4GeeJJ1d6c

[@califmike2003]

What if my front 2 speakers and tweeters are on there own crossover seperate from the amp ?

[@DIYAudioGuy]

A component set? I would set the high pass to somewhere between 80 and 120, then adjust from there to get the sound you want. The crossover that came with the components will take care of the split between the midrange and the tweeter.

[@califmike2003]

@@DIYAudioGuy yes component speakers in the front a woofer on the front left door a woofer on the front right door Tweeter in the left a pillar Tweeter in the right a pillar in the back I have speakers that already have the Tweeter built into the center of the speaker I will try the high pass filter because I'm not getting the sound I want even close thank you.

[@austinhohnke5470]

i started car audio when x-over just came on amps

[@DIYAudioGuy]

Old school stereo for sure!

[@joemiller4643]

I have a taramps 1200.1 I have done everything I could and can not hit target voltage. -12db lp crossover the min for the lp is 80hz. So should I just keep turned all the way down seeing how im always 2-4v off of my target ?

[@DIYAudioGuy]

Turn the head unit up a little bit.

[@joemiller4643]

@@DIYAudioGuy its at 75% of max already

[@lflsremodeling]

Funny thing happened. The voltage changed when the volume changed. I guess volume does matter.

[@DIYAudioGuy]

True

[@kngt9655]

What if my DMM does not go lower than 15V? I can’t match my calculations

[@DIYAudioGuy]

Odd, not sure what to tell you. It is hard to troubleshoot in the KZbin comments.

[@deividasblavasciunas4783]

Hi, do i first must set crossover or gain?

[@DIYAudioGuy]

Set the gain first.

[@deividasblavasciunas4783]

@@DIYAudioGuy Thanks

[@tino4837]

Where did you take the Q-factors from? I‘d like to adjust a HIFONICS Thor 5-Channel Hybrid DSP Amplified TRX-5005DSP.

[@DIYAudioGuy]

If you don' t know the crossover slope then you are just guessing. A safe guess is to assume 12db/octave. Then do some listening, if you don't like the sound make some adjustments. To learn more about the math check out this video: kzbin.info/www/bejne/apynqYiZfKiYbq8

[@tino4837]

@@DIYAudioGuy coming back to my initial question I’d like to ask again where you take you Q-values in the Excel from. I’d like to check higher slopes that my amp provides (24, 30, 36, 42, 48), but without the corresponding Qs I can’t.

[@DIYAudioGuy]

@@tino4837 It is based on the dbV formula in this video: kzbin.info/www/bejne/apynqYiZfKiYbq8

[@tino4837]

@@DIYAudioGuy thanks for pointing on that. The dbV-formula involves a log of V1/V0. I can’t seem to adapt what would V0 and V1 be. Would you mind to give an example please, maybe the values that lead to the Q for 12 db and our 18 db in your Excel. I hope to get it from the numbers in your Excel and that I can then adapt the principle to calculate any slope I want.

[@DIYAudioGuy]

@@tino4837 0 and 1 are time stamps. 0 is the starting voltage (voltage before you start adjusting the crossover frequency) and 1 is the ending voltage (adjust your frequency until you get this number). If you are struggling with the math get one of these: lddy.no/1cgsq

[@anglerandy5736]

Why use a cell phone for signal instead of the head unit? I don't have a aux to rca other than the one installed on my head unit lol.

[@DIYAudioGuy]

Six of one, half a dozen of the other

[@matthewvanvossen2767]

I’m using a sundown sam65.4 and it has level not gain, so is there a difference?

[@DIYAudioGuy]

They should be the same thing. Just with a different name.

[@matthewvanvossen2767]

@@DIYAudioGuy my other amp is a crescendo s1v2 the speaker is wired to 1ohm and the amp does 1650 @ 1ohm so would it be the square root of 1650? Also I’m running a pac lc1 I assume that should also be turned all the way up

[@DIYAudioGuy]

@@matthewvanvossen2767 since you're running that kind of power and that kind of gear I would recommend that you get an oscilloscope or a DD1, and yes the square root of your wattage is the voltage you're looking for in your case. As far as the setting on the line out converter, It's just like anything else in the signal chain you want it turned up to just short of clipping. That way you'll get a good strong preamp signal into your amp. You could always prove the RCAs, if it's supposed to be 4 volt preamp outputs then the RCA's would read 4 volts. Hope that helps!

[@matthewvanvossen2767]

@@DIYAudioGuy ok what would a base line voltage be to get it started, Until I can get a dd1? it’s pushing a sundown u series 10” and my deck is an 80prs it’s pushing 4.8v preamp out. I assume the square root of 1650 then so 40.62

[@xsmatt81]

be careful with tone generators. unless the app lets you specific the db output of the tone. I smoked an alpine Type R ( i was drinking i admit) my gains had been set to -10db for a few months no problem on a Alpine MR600 that actually put about 40 volts or around 800 w rms out. Anyway, i was fiddling around and played some 30-40hz tones at 0db on accident and fried the SUB...the amp was spiking well past 40 volts.. short story if your gains are set at 0db, you will be fine..but if they are set to example -10db overlap, or even -5db etc..and you play 0db tone , can do damge some of the apps will let you adjust up or down the db level of the tone best bet just make your own tones in audicity and put em on a flash drive, what i do to tune..and i mostly listen to music off flash drive anyway

[@DIYAudioGuy]

Just one reason why I don't set up gear when connected to a speaker.

[@FacialVomitTurtleFights]

The real question is how to know what slope your low pass filter is.

[@Dj1Kreationz]

Should i start with 50hz or 80hz test tone ?

[@DIYAudioGuy]

80

[@Dj1Kreationz]

@@DIYAudioGuythanks

[@Dj1Kreationz]

@@DIYAudioGuy okay...so on my club a600 amp, it doesn't have lpf or hpf switches...how do i go about adjusting crossover, i tried turning lpf all the way up and with multimeter read 50.2v...i times that by .501 which gave me 40.180....after listening subwoofer sounded TERRIBLE 😅

[@LOV2XRL8RL]

I'm having a hard time trying to figure how to adjust the gains on my amp. I know that you have set the stereo volume on 3/4 of his capacity. Then unplug the subs, connect the voltmeter to the + & - subs and go from there. My subs are 400w RMS and 800w max @2 Ohms So 800 x 2 = 1,600 √ 40 volts 40 v is the number I need to set my amp gains. 1. Amp gains set 2. 38.9V it's how I left the gains (39V) 3. It's the volume I set for the gains and the voltage mentioned before (39v) 4. Once I turn up the volume to 40 (which is the max output of the stereo) the voltage goes up to 57V 👀 5. Max volume Note. While setting the gains, everything is on 0. Bass Booster, Crossover, every setting on the stereo is 0 too. My question is...do I need to set the gains like that, meaning, that's ok? The voltage going up to 57v is part of the setup or...what I'm doing wrong 🤔

[@DIYAudioGuy]

I think I replied to your other comment.

[@LOV2XRL8RL]

@@DIYAudioGuy Let me rephrase my question. Once I get the correct voltage, which is 40 in my case, what happens with the settings on the stereo? I leave them flat or what? Because once I start playing with them the voltage goes up beyond 40.

[@bryanbill3692]

@@LOV2XRL8RL You should leave them flat to avoid going into clipping. If you can't live without the eq settings you're in a good situation. Since you know what degree you're going above 40 V when setting the eq then just set the eq to your taste and record the new voltage. Next, drop the gain until it reaches your target 40 again and you're done. Basically you're reducing output signal to match the new settings on your head unit. This should keep you playing your music safely.

[@LOV2XRL8RL]

@@bryanbill3692 Thank you Bryan

[@venturaac]

My amp is 24db per octave. What is the formula to find my voltage factor????

[@DIYAudioGuy]

Had to make a deep dive into the archives for this. This was the second video I ever uploaded to KZbin! kzbin.info/www/bejne/gYbZe4GeeJJ1d6c

[@venturaac]

@@DIYAudioGuy thank you! I actually saw that after seeing the first video.

[@TJsVette]

I cant comprehend any of this. I feel lost and confused. I guess i need to take my car to a shop and have them tune it for me cause i have no clue whatsoever.

[@DIYAudioGuy]

it is not impossible to learn, it just takes some time. The way I see it is you can either pay with your time by learning how to do it (I like this method because I find learning new things to be fun and interesting) or pay with money and have an expert at a shop take care of it.

[@venturaac]

This doesn't make sense with my amp. I did 80hz, turned LPF all the way down. MM read 2.5. Multiply that by .251 = .6275. I don't get it. Please help. Dividing by .251 makes better sense and a normal number. I'm lost.

[@DIYAudioGuy]

First make sure that the LPF is "off" Meaning that it is set so that it does not have an impact. If you don't have an off switch then you need to turn the LPF to it's highest setting -- so UP, not down. When you multiply any number by a number that is less then 1 you get a smaller number, which is what you want. The LPF will reduce voltage at the crossover frequency.

[@venturaac]

@@DIYAudioGuy this makes more sense! Thanks so much! I'll give it a try!!

[@surviver5738]

You never explained how you got to 501 in detail, has left me very confused.

[@DIYAudioGuy]

kzbin.info/www/bejne/gYbZe4GeeJJ1d6c

[@razhocarjr]

For some reason my multimeter isn’t reading anything.

[@DIYAudioGuy]

Check the battery.

[@razhocarjr]

DIY Audio Guy it’s on but it reads 0.

[@razhocarjr]

DIY Audio Guy I am actually working on the gains then the crossovers. But it is not reading. I have the app playing the amp has power. But it is not reading. Not sure what I’m doing wrong.

[@DIYAudioGuy]

@@razhocarjr when I was filming my last video I had the same problem. I forgot to plug in the RCA's. Take a break for a few minutes to step away from it, then go back in and check every connection. Make sure the source unit is on, make sure the amp is turning on, make sure you're checking the correct speaker terminals,...

[@razhocarjr]

DIY Audio Guy Thank you. I found the issue. I appreciate your help and patience. Great deal of knowledge from your channel. Thanks so much.

[@congojackshootsu9304]

KZbin test tones DO NOT WORK!

[@DIYAudioGuy]

Is that because of KZbin's compression, or because people don't upload clean test tones?

[@miketaggart3803]

Not hitting target voltage on this either. Tried both lo pass and subsonic filter. Watched video many times and paused for each step. Is this bullshit or am I just a dumbass?!?!?!

[@DIYAudioGuy]

I commented on your other reply, have you tried turning the head unit up a little bit? Did that help?

[@miketaggart3803]

@@DIYAudioGuy Ok, I am a dumbass. I didn’t have my cell phone turned up all the way when playing the test tone. Oops. Now, I am at my target voltage and I didn’t have to turn the gain up very high either to achieve the volts. But, doing the crossover and achieving target volts is still stymying me.

[@DIYAudioGuy]

@@miketaggart3803 well, that's a step in the right direction!

[@seminolesfs7]

Great video for explaining how to set your crossover. Being that crossover reduces voltage output to the speakers, would you recommend readjusting your gain to achieve the recommended voltage originally calculated for the gain?

[@DIYAudioGuy]

Nope.

[@jonduberman2573]

You won’t need to, because the test tone you use to adjust your gain for each specific channel should well inside of the envelope for the filter applied to it. i.e. a 50 hz test tone with a 120 hz low pass filter.