Ive got a 2-channel 750 watt pioneer amp with 3 600 watt 12" pioneer subs wired to it. It sounds nice. I bridged it like it said on the back of the sub box.Anyway,I know if you wire 3 subs the power is distributed from the amp to the subs evenly so they get less power.But is it possible to wire up a 4th sub to the amp without having to get another amp? and would I just put 2 subs in each channel?? also..if I were to get another amp can I just wire it to the other amp instead of wiring it to the battery and everything??

 

Okay first,

Give me some details...

Amp RMS = ?
Each 12" RMS = ? Is it a dual voice or a single voice coil, are they 2 ohms or 4 ohms? There is many ways to wire them esspecially if they are dual voice.

Right now you have 3 subs wired to one channel on the amp, and that amp is bridged to get the most power from that one channel right? Or do you have 2 subs wired to one channel, and another sub to the other channel?

4 subs connected to one 750W amp may be over doing it. The subs might need more power then the 750 can provide then they will cut out. So tell me the rms for each sub. and I'll answer this in more detail for you.

 

Im not sure of the info at this moment lol. The box is at home and Im at my girls house.So Ill check when I get home. Anyway, I have one sub in each channel (its a 2-channel amp) and the third is wired up the power wire in one channel and the ground wire in the other channel

 

I suggest you buy another amp and run 2 subs to each bridged amp.

But if your amp is strong, and your subs are taking to much power you can bridge the amp to get the mostpower out of the 2 channel. Bridging it to 1 channel. Then depending on how many ohms your subs are and what type you can either wire up all subs to 2 ohms or 8 ohms. This all depends on the power handling your amp has.

For maximum performance I suggest buying a 2nd amp

 

well I went to Best Buy and asked about it as well.I told the guy how I had a sub into each channel and the third was in both channels.He told me that the two subs were 4 ohms and the third was 8 ohms and was drawing power from the other two.I told him I want to buy another sub and re-do my enclosure and he told me to wire them parallel 2 subs in each channel.I asked him then if I could just put 2 subs in one channel and leave the other in the other channel and he said no because you want it to be balanced.So until I get that 4th sub Ill leave it the way it is.He also told me since its a hatchback I should angle the subs to the glass so they have something to bounce back from.And he also said its about the air that is moved and with 4 subs a lot of air will be moving around.So when I re-do my enclosure Im going to lay the 4 of them flat facing the rear windshield.

 

If you want to get the most out of your 4 subs, I suggest you buy another amp.