I recently bought a 12" Aduiobahn 2003 AW1251T 2ohms 8ohms operational 400w rms 800w peak. Ive also bought a sealed box to fit in the trunk well that is 0.92 cubic feet (sub needs between 0.75 - 2.0 cu. ft.) now ineed a amp. I was thinking about going with a 2 channel amp and hook the audiobahn to 1 channel and my existing stock front speakers to the other... is this a good idea or will i blow out my stock speakers? (2001 model s2k) also im having a hard time figuring out what kind of spec. amp i need to power the sub. like how many watts will the amp have to be and many watt amp will a mono, if i decide not to hook my front speakers to it?

 

Do not hook up your stock speakers to an amp powerful enough to drive your sub. You will destroy them.

You are better off dedicating a single amp to your new sub. Use a stable two channel amp and bridge it. You will have half the ohms but twice the wattage. For your setup i would recommend over 400 watts. Do not starve your sub!

This will make for a bass heavy system. Not ideal. At this point you might want to fork out the cash for new speakers and a small amp to run them. You can get a new headunit that has higher wattage (this is better but not great).

You could get a three channel amp and use it for the new fronts and sub.

And while you're at it, get a new headunit. And you can't just use any wires...

To balance your system correctly it looks like you might have to get some gear. Read the threads on this site esp. the S2000-specific Audio FAQ. It's way usefull.