Ive been looking for benchmarks for my 2 alpine amplifiers. one is a MRP-M450 and the other is a MRP-M220. if anyone knows how to find them that would be great. ive tried searching msn and google with no luck. for all i know there might not be any for these amps. but i couldnt find them for ANY alpine amps. maybe im not searching right. who knows. thanks for the help guys.