US Acoustics 4065 Experience

Question

Just to let you all know:Purchased a USAcoustics 2 months ago from Sounddomain.Ugh... finally got it installed yesterday and turns out i have a bad amp. UGH. Channels 1 and 2 appear to have a problem. Any significant gains or volume increases causes the unit to go into protection. Channels 3 and 4 are fine. Fuses have been checked and replaced anyways and this condition exists.Ge0... any idea on what may be the cause? Cheap fix?In anycase... I'm not very impressed at all. Made in Korea. Ugh... I so regret selling my Orion XTR...Gordon