will a 2-channel absolute 1600 watt amp push two L5 15" solobarics? oh yea do you have to have preamp subwoofer output on a deck for subs to work? sry for all the ignorant questions im new to all this.
do you have a link to the specs on this amplifier? is it 1600 watts RMS or peak?
the head unit should have pre-outs, but as long as the amp has its own low pass filter or crossover built into it, the pre-outs don't have to be specifically for subs. without any pre-outs on the head unit, you'd need a line reducer or LOC to convert from high power to line level signal for an amp.