:If you are driving components. :For bass, rockford fosgate's (mono) stuff has worked extremely well in my past expirence. :When I build the next system I will use this because alpine no longer makes high power 2 channel amps. I think that amp will pump some sweet loving out of some MB quart Q series. I would look on Ebay for OLDER PPI or Xtant. The new PPI is junk which I assume you guys dont like but the old PPI is still one of the best amps ever made.. A404 40X4, A600 150x2 600 mono RMS!!! PC450 is a A404 with a crossover and litle better power supply as is the PC2150, 600 mono. Xtant has the 3300C and 3300X. Ideal amp for a complete system. Ive seen all of these on Ebay for well under $500.00 and these will last longer then any new average amp you can buy now.