HA5K FET Pure Class A Headphone Amplifier Base On Audio Tec-hnica HA5000 Amp Circuit

This is a Full Separate Pure Class A headphone amp. the circuit is base on the famous HA5000. the sound is very Excellent!! Using Toshiba 2SK370 FET as a single differential input, sound is very delicate, K2955 J554 power FET as the output, low frequency is very full, very flexible. On the amp Board with a gain switch, you can set the magnification depending on headset. Works voltage: AC 115V or 230V(Optional) Load impedance 16-600 Ohm Sensitivity of 1.1 V / 50,000 ohms Maximum output power 2,400 mW + 2,400 mW (16 ohm load) 1,200 mW + 1,200 mW (32 ohm load) 600 mW + 600 mW (64 ohm load) 65 mW + 65 mW (600 ohm load) Input impedance: 47KOhm Frequency characteristics: 10Hz - 35kHz Signal ratio for noise: >90dB @ Gain 6dB Output impedance: line output 0.2 Ohms Frequency Response 5 ~ 200,000 Hz Size:155mm*60mm*265mm (W*H*D) Packaging weight: About 2.5KG Packaging includes: HA5000 Class A Headphone amplifier                          X1 NOTE: We do not provide any cables.