Features and specifications: 1) Adopting symmetric, complementary and bi-differential circuitry 2) Original 150W triodes with powerful output work in parallel to reduce output impedance 3) Comprehensive protection includes soft start, middle-point DC output drift (?.02V), output short circuit, temp, overload and auto limiter circuitry 4) Built-in low noise, high flow cooling fans 5) Full range LR output 6) Full range BTL output 7) Subwoofer LR output 8) Subwoofer BTL output 9) Power output: (full range RMS), PA-1200, 2 x 600W (4 Ohm), BTL-1250W (8 Ohm) 10) Input sensitivity/impedance (L-R channels) 11) Unbalanced 775 mV / 20 kOhm (1kHz) 12) Balanced 775 mV / 10 kOhm (1kHz) 13) Power output: (subwoofer RMS), PA-1200, 2 x 440W (4 Ohm), BTL-1100W (8 Ohm) 14) Input sensitivity/impedance (L-R channels) 15) Unbalanced 775mV / 20 kOhm (150Hz) 16) Balanced 775mV / 10 kOhm (150Hz) 17) Harmonic frequency: Fo=20Hz 18) THD: < 0.03% 19) S/N: 97dB (A-weighted) 20) Slew rate: > 35V/uS 21) Damping factor: > 300/8 Ohm 22) Power supply: AC, 220V, 50/60Hz Inner packing: Dimensions (unpacked): 133 x 483 x 450mm N.W. (unpacked): 20.40kg Outer packing: Carton dimensions: 235 x 545 x 545mm G.W.: 22.00kg CE,CB & CCC approvaled, welcome for OEM! Please refer to our website for more information and more models, thanks.