Woo Audio WA22

* Technical Specifications: Headphones impedance : 8-600 Ohms * Input impedance: 100 Kilo-Ohms * Frequency response: 8 Hz - 50 KHz, -3dB * Output: 810 mw with 6080, 2 watts with 7236 power tubes * Signal/Noise: 92 dB * THD: <= 0.3% * External dimension: 7”(H), 12”(W), 10.5”(D) * Weight: 25 pounds or 11.4 kg * Voltage: AC 110/220V, 50/60 Hz * Standard Features: Point-to-Point wiring * True balanced topology * All tubes. No semi-conductors in the entire circuitry * One 5AR4 [PDF] rectifier tube. Direct substitute: 5U4G * Two 6SN7 [PDF] drive tubes * Two 6AS7 / 6080 [PDF] power tubes * DACT CT2 balanced stereo stepped attenuator * One balanced XLR input * One single-ended RCA input * Two 3-pin balanced headphone output (left and right ch) * One 4-pin balanced headphone output * One single-ended headphone output * High and low impedance switch