Well I have my whole system hooked up, iva-w205 pdx 4.150 on comps, sundown sae-1000 on single type R 10", I just installed my sub amp and have the sub out +15 on the deck and running at 2ohm on the single R so it should be getting 600wrms from the sundown specs, I was trying to adjust the amp but even with the gain cranked all the way up Im barely getting anything out of it unless I turn the bass boost (cringe) up about 1/4 turn then its ok volume...I wanted to use this amp to run a single 13w6 but just wondering why I wouldnt be getting more output?