Car subwoofer help??

Question

so i have a car that came with an amp.. and i want to buy a sub and head unit. i dont know what kind of sub i can get with it? can somebody guide me in the right direction? heres the amp specs on their site.

Audiofonics ADF-242

4 CHANNEL-1100w MAX

HIGH ENDURANCE SLIM AMPLIFIER

4 CHANNEL [2 OHM] 110W x 4

4 CHANNEL [4 OHM] 80W x 4

2 CHANNEL MONO [4 OHM] 220W x 2

2 OHM LOAD CAPACITY

VARIABLE LOW [40-250Hz] PASS FILTER

VARIABLE HIGH [40-250Hz] PASS FILTER

BASS BOOST

RCA PRE-AMP LINE OUT

SPEAKER LEVEL INPU

Answer 1

This is a 4-channel amp, so you have a few options.  

Two channels can be combined (or "bridged")  into a single channel for more power.  In this way, it can be used as a high power 2-channel amp.  You could use it with a pair of subwoofers.  Pick subwoofers that are 4-ohm, single voice coil, with a rated RMS power no lower than 200 watts.

If you want, you can bridge two channels for a single 4-ohm subwoofer, then use the remaining two channels for a pair of front or rear speakers.