Tubes: Western Electric 300B x 2, 12AX7 x 2, 12AU7 x 2 Bias: Fixed bias, adjustable with bias meter Output power: 12W+12W at 8O Frequency response : 16Hz-56kHz(-3dB) S/N ratio : 93dB Input sensitivity/impedance : LINE:310mV/100kO MAIN IN:900mV/100kO Input terminals: RCA unbalanced x 5 (LINE1-4 ,MAIN IN x 1) Speaker output terminals : 4~ 8O High quality terminals Other function: MAIN IN switch (Rear panel), Remote control: POWER, VOLUME, MUTE, INPUT SERECTOR, DIMMER Power consumption: 130W Dimensions/Weight: W440xD330xH235mm /29.0kg Accessories: Tube cover , Remote control unit