BCNXDA 708B - Tube Pre-Amplifier Headphone

Parameter: Model:708B 4th generation, we have black&white colorand will send it at random Size 180×80×270mm Input Impedance: 100K Pre-amp Output Impedance: 600 ohm Headphone Amp Output Impedance: 32 ohm- 600 ohm( The engineer especially recommends this amp for high Impedance) Signal to Noise Ratio: 89dB Frequency Response: 20Hz--30KHz Distortion: less than 0.01% Headpone Output Power: 500mW--250mW Supply Votage: AC100V-AC240V available 60Hz/50Hz Net Weight: 2.5Kg