I figure H/U's are sopposed to get hot but when is it too hot? I mean i couldn't put my finger on the heat sink for a second without it hurting. Now what could be causing this? or is it normal? My sub out is max but the bass to the speakers is as low as it goes and my volume at listening level is 25 of 40-60 iono cuz i never turn it up higher than that. So whats up?