Hi j have purchased a 1600 ex its been a year and a half and I am very glad I have never had a problem with the fact that I run on two rear mounted subwoofer pavillonaire 554k 600W and the amp sends the sauce thoroughly + 5db on each channel with the crossover all the time for over 12 hours to make a small clip one night he can but the amp does not heat even if not very pleasant quiet indoor day I try the crest qsc peavey ... and I compare it to a crest of good quality son.je found that for the price c of the ball is not better for the power it look only the weight problem but we can not have everything and I pence I'll buy a 2nd largest for the low