I primarily use Arc Audio amps on everything we do. We have used other amps with great success, but some just do not make sense economically. Hawg-wired has a decent amp, its just almost double the money for their 2-channels, and the four channel is $600 more than the Arc KS125.4 that does fit in the fairing. If anyone needs info on mounting an Arc KS125.4 in the batwing, just contact me directly and I can get you info.