how do I calculate tuning voltage on 3 woofers?

[CSCStang]

Correct op. Just use your final impedence multiplied by the rms you WANT to output and take the square root of that to find vac

Yes, but if you calculate 400rms and run 3 subs, they will be way underpowered.

 

[mrpep]

Sounds like I'm over powering, what If I disconnect 1? This way I have 2 only? Will that sound better than 3?

 

[CSCStang]

No, because you will then have a 4 ohm or 1 ohm load. Op, you need to set gain at 45 vac.

 

[mrpep]

So do I multiple the 3 woofers 400 rms x 3 then multiple ohms 2.67 then sq root ?

 

[CSCStang]

So do I multiple the 3 woofers 400 rms x 3 then multiple ohms 2.67 then sq root ?

800x2.67=2136. Sqrt=46 vac. Accidently wrote 45 in last post.

 

[Jeffdachef 5,000+ posts]

So it doesn't matter whether there are 2 or 3 woofers the formula remains the same ? I use the rms of the woofer because I don't to blow it if the amp is too powerful.

So that means givingThese 400watt rms woofers 800watts. They are 400rms though, wont i over power?

you are not gonna blow sh*t stop worrying about it. Your amp's not gonna produce anywhere near that much power. Music is dynamic just because your amp says it can do 1000 rms doesn't mean you'll get close to 1000 rms in actual performance set after accounting in impedance rise.

 

[mrpep]

Ok, so use 46 vac. Cool, I'll update info once I test .

 

[mrpep]

Yeah but The apodera aré 400rms

 

[Jeffdachef 5,000+ posts]

Yeah but The apodera aré 400rms

i would encourage you to read up on impedance/box rise and look at clamp tests. Lets say You set your amp to do 1000 rms with the multi-meter, however after voltage drops, impedance rise and an actual load on it, you wont get anywhere near 1000 rms. That the exact reason why people have been able to push 2000 watts rms to two 600 rms subs with ease. Its not because its a strong and good sub, its because of every else going on in the system.

 

[mrpep]

i would encourage you to read up on impedance/box rise and look at clamp tests. Lets say You set your amp to do 1000 rms with the multi-meter, however after voltage drops, impedance rise and an actual load on it, you wont get anywhere near 1000 rms. That the exact reason why people have been able to push 2000 watts rms to two 600 rms subs with ease. Its not because its a strong and good sub, its because of every else going on in the system.

with this said, should I tune to 800 watt peak? instead of 400 rms ? This way my gain is set to max and I can control with bass knob?

 

[mrpep]

is their a better option for wiring my woofers? what is the optimal wiring diagram ?

http://a248.e.akamai.net/pix.crutchfield.com/ca/learningcenter/car/subwoofer_wiring/3DVC_4-ohm_mono.jpg

 

[mrpep]

ok, time to change the tuning voltage because this ******* just pierced through the rubber foam around teh cone with his drill. Who fixes this and how much?> //content.invisioncic.com/y282845/emoticons/furious.gif.fc81ca146dbff91fede3ed290dbc4f4c.gif

 

[CSCStang]

Dude you've been given the answers. Leave the wiring the same, set at 46 (if it's not clipping, then go to 48) and get some epoxy to fix the break in the surround.

 

[CSCStang]

is their a better option for wiring my woofers? what is the optimal wiring diagram ?
http://a248.e.akamai.net/pix.crutchfield.com/ca/learningcenter/car/subwoofer_wiring/3DVC_4-ohm_mono.jpg

You already said this is how you wired it. Leave it and you're good to go.

 

[Jeffdachef 5,000+ posts]

Black silicone. Dude, most of these small trivvial problems you run into can be solved by googling or youtubing "how do i fix subwoofer surrounds lol.