Very nice Alesis RS-300 studio reference amplifiler This is a professional amp made for studio use so there is no fan, super quiet,... great for audiophile as well. 90W per channel @ 8 ohms 150W per channel @ 4 ohms 300W bridged @ 8 ohms Signal to noise >105dB, 10Hz-70kHz frequency response. Distortion of <0.02% @ 4 ohms, 20Hz-20kHz. $120 firm! alesis, yamaha, qsc, jbl, recording studio, hafler, krk, event , kef, audiophile