no matter its lower end, middle end or highest end will distort at a certain limit capabilities of the products. In short distortion occur when u jeopardise your speakers. To avoid distortion, match ur amp rating with ur comps requirement(norm refer to RMS for exact but there is a max output) but nowadays the spec is not 100% can be trust.

Proper matching is very important.

i used my favourite songs and mayb prefereable cd's..but its hard to tune for all type of songs....i mostly listen female vocal, instrument of guitar & piano....but recently i try bought saxaphone cd but unfortunate my comps cant perform.....