98Birdie

I have a JL 12w3v3 sub that is 4 ohm. The amp I have is a Fosgate P325.1. Question, the installer hooked it up with the positive and negative from 1 channel. Can it be wired with a wire in the positive of one channel and the negative in the other channel? The sub is 500 rms. The amp can be bridged at 2 ohms. Does this make sense?

Is this possible?

MeentSS02

iTrader: (11)

Single voice coil sub?

98Birdie

Yes, single voice coil.

MeentSS02

iTrader: (11)

That's going to be the problem - looks like that amp is rated at 175w @ 4 ohms and 325 @ 2 ohms. You'll need to present it with a 2 ohm load, and that can be done by wiring a 4 ohm *dual* voice coil sub in parallel or a single voice coil that is 2 ohm. Unless you change the sub from 4 to 2 ohms, I think you are stuck.

98Birdie

Well, time to seek out another amp.

MeentSS02

iTrader: (11)

...or a 2 ohm version of your sub.

99Bluz28

iTrader: (35)

That's what I like about DVC subs, it give you some Amplifier wiring option.

Fosnot

iTrader: (15)

What I've seen throughout the thread is all true... you could also get another identical woofer, and wire those in parallel, then bridge it...
Probably be better though if you could get a 2ohm single of that woofer, or if they make a DVC version get that (I'm not up on my JL's)

slow96z

iTrader: (12)

Unless I'm reading this wrong, it seems the installer has it wired into one channel of what would be a 4 ohm stereo setup if there were 2 subs. As long as the amp is bridgable it should run at 4 ohm mono (one channel positive and the other channel negative) which would give you a lot more power. Take a look at the 2 speaker outputs in question, there should be a line showing which positive and negative to use for bridged applications. Yes you would get more power from having a 2 ohm load running mono, but the 4 ohm load running mono will get a lot more power than running a 4 ohm load on half stereo.

Does that make sense?