I BOUGHT IT USED BUT LOOKS NEW. I TRIED IT ON MY MAN CAVE 3 WAY SPEAKERS AND I FOUND THE FAN NOISE TO BE TOO LOUD. I REPLACED THE QSC FAN WITH A FAN HALF AS QUIET. I USED AUDIOPHILE CABLES AND A Vincent SA 31 PREAMP. THE AMP HAS IMPRESSIVE HIGHS, NEUTRAL MIDS AND STRONG CLEAN BASS. I TURNED THE BASS UP ON THE PREAMP AND I EXPERIENCED SOME VERY GOOD HIFI SOUNDING MUSIC.