Wiring 3 SVC Subs

[ajianoshonen]

I have 3 Svc JBL subwoofers, and i hooked everything up. but these subs are not hitting hard at all. And one sub gets more power than the other 2. I thought i wired them all parrallel, but since one sub gets more power than the other 2, it messes up the airspace inside the box, and i was wondering, could it be that i wired them in series and not parrallel?

[SQ GT-S]

Are all three subs playing off the same channel on the same amp? If so, then one isn't getting more power than the other. Also, as you said, if they are wired in series and not parallel, you might not be getting enough out of the amp.

For starters, how many ohms are your subs? Then, what amp(s) are you using to push them? Remember, if you are running different amps for different subs, they should be in different enclosures.

Curt

[ajianoshonen]

IM running 1 amp for 3 scv subs, the subs are 4 ohms, 200RMS, and 400 peak, my amp is a jbl bp1200.1, 1200w rms amp. I know the amp is too powerful, but i got a good deal on it and i plan to upgrade sometime later on. I think i got the problem fixed though or i am going to, i know its wired wrong, cuz my friends 1 12 Alpine subs is louder than all 3 of my JBL's, so im going to get it rewired in a few minutes, but reply back Curt and tell me anything that can help. Thanks alot!

[S|Lv3rBu||et]

Probably, I would run two of the subs in series (making them an 8 ohm load) and then run that in parallel with the third sub (for a total impedance of 2 2/3 ohms) Do it that way to protect your amp (unless the amp is stable below 2 ohms). As far as it not sounding loud enough *shrug* try turning it up?

[SQ GT-S]

S|Lv3rBu||et, that idea would work in theory, but in real life it's not a good idea. The two subs in series will get 1/2 the power (each) of the one in parallel. With that power difference, you will run into more problems.

According to the spec sheet on the JBL 1200.1, you can put a 1-ohm load on the amp with no problems, but there won't be an increase in power over a 2-ohm load. So with that in mind, putting the speaker all in parallel will yield a 1.33-ohm load on the amp. This will push at least 1200 watts from the amp, or 400 watts per sub.

So, I recommend paralleling all the speakers together. Put all the positives together into the amp, and the same with the negatives.

Curt

[ScorpionX2]

Curt is dead on...listen to the man.

[blazin-sc]

Originally posted by SQ GT-S
S|Lv3rBu||et, that idea would work in theory, but in real life it's not a good idea. The two subs in series will get 1/2 the power (each) of the on in parallel. With that power difference, you will run into more proplems.

According to the spec sheet on the JBL 1200.1, you can put a 1-ohm load on the amp with no problems, but there won't be an increase in power over a 2-ohm load. So with that in mind, putting the speaker all in parallel will yield a 1.33-ohm load on the amp. This will push at least 1200 watts from the amp, or 400 watts per sub.

So, I recommend paralleling all the speakers together. Put all the positives together into the amp, and the same with the negatives.

Curt

Right on.