Introducing Woo Audio's newly revised reference Class-A vacuum tube headphone amplifier..
This new WA5-LE introduces a host of new innovations and features
Headphones impedance: 8—600 Ohms
Frequency response: 10 Hz—60 kHz, -2dB
Power output: up to 8 watts via 4-pin XLR and 1/4"
Signal/Noise: >= 95 dB
THD: <= 0.08%, 1kHz
Two 300B [PDF] power tubes
Two 6SN7 [PDF] drive tubes
Two 5U4G [PDF] rectifier tubes
Voltage: AC 110/220V, 50/60 Hz
External dimension (each): 8½(H), 9"(W), 17"(D)
Weight: Amp Unit: 35 lbs, Power Supply Unit: 40 lbs