Features and specifications: 1) Dedicated circuitry design 2) Powerful toroidal transformer 3) Soft start for avoiding transient damage (overload, thermal and short circuit protection) 4) Optimum cooling and ventilation system 5) Professional design of panel 6) Unique limiter control circuit 7) Input sensitivity: 0dB (0.775V) 8) Input impedance: 15k (unbalanced), 30k (balanced) 9) Power: RMS 8 Ohm: 2 x 170W 10) Bridge operation: 680W 11) THD: <=0.03% 12) Cross talk: > 80Db 13) S/N ratio: > 97dB 14) Slew rate: 12V/ms 15) Damping factor: > 300/8 Ohm 16) Frequency response: 10Hz - 20kHz 17) Power supply: AC 220V, 50Hz Inner packing: Dimensions (unpacked): 483 x 430 x 89mm N.W. (unpacked): 12kg Outer packing: Carton dimensions (unpacked): 545 x 545 x 195mm G.W.: 13.50kg Please refer to our website for more information and more models, thanks.