Folks,

Thanks again for all your help in this forum, ton's of good info. I have an Alpine Amp (PDX 4 150) that I'm bridging for a sub. I'd like to get just 1 10's sub in an e-bay box under the back seat of my 05 Screw.

The issue I'm having with this game plan is that there's 2 model of the Alpine SWS 10 " subs, one for 2 ohms and the other for a 4 ohms setting. Both are dual coils.

My question, which one works?

Thank you very much for your help with this.

E.

 

they will both work. you could wire the 2ohm in series if you wanted to play it at 4 ohms, or wire the 4 ohm in parallel to get 2 ohms.
and with the PDX amplifiers they push they same power at 4 ohm and 2 ohm.
on alpines website it says "bridged 4 ohms : 300Wrms X 2" so you could just get the dual 4 ohm and bridge it at the amp

 

http://www.the12volt.com/caraudio/wo...igurations.asp
Use this to determine your final load. Match it to what works best with your amp.

As a general rule its easier to find higher power amps that push 2 ohms then 4.

But after rereading your bridging a 4 channel to a sub, not a great idea. You have to run a dual 4 ohm sub and bridge each channel to a single 4ohm voice coil. Which means you are going to give each coil 200-300w(300w@14v) on a 300w RMS sub (150w on each coil). Thats slightly over powered so becareful with your gains.

 

Well, my game plan was to use 2 channels to power the front components and bridge the other two to power the sub. I can set the amp in bridge mode to 4 ohms, I'm guessing I'll need a 4 ohm subs then (2 coil)/ Alpine S?

 

Still wouldnt recommend it. Not sure if that amp is going to like 2 channels bridged and 2 not.

You would have to run a dual 2ohm and wire it to a total 4 ohm load.
http://www.the12volt.com/caraudio/wo...s.asp?Q=1&I=22

 

Ok, so I'm better off not powering the Amp with the 4 channel sub and get a mono to power the sub alone? I rarely use the back seats so I didn't feel the need for powered (except from the HU) speakers in the back.