Summary: i tested on accoustic music and simple stuff like AC/DC. sounded great. i bought it even with the test speakers. at home i played more complex stuff - hardcore, death/black metal and all i got was a messy wall of noise. high tones were too sharp for me - nails. this amplifier plays great when listening to accoustic stuff, ballads, piano etc. i returned it and bought yamaha a-s700, great sound for heavy music, dynamic, detailed guitar work, high tones are soft - needles.