5ch amplifier is the accident.
Filter does not work, does not enter the low-pass. Otherwise tested! Is proud of the whole body high-power amplifier and high quality. State full of scratches 75W 4 +220 W 1 rated output power of large 1220w maximum 360w 2 +500 w total of 4 is not very good. Please check your purchase on the current situation.
The accident 5ch amp (XM-7557) - 02-113609