Product Details:
This amp is base on Beyerdynamic A1. each channle using 2 pair Original BD139 140 in parallel, Strong thrust. With 30MVprotection current,delay 7 seconds output audio. we have test this amp with Beyerdynamic DT series headphones, AKG K501, K601, K701, Sennheiser Headphones HD Series, all has very good performance.
1:) 1/4W 1% precision metal film resistors (made in TAIWAN) .
2:) BC high-end filter capacitances,South Korea SAMWHA Aureate electrolysis.
3:) AUDIOPHILE MKP 4U7 400V 3% precision tinfoil capacitance .
4:) Origilal ST MC33078N opamp.
5:) Philips BD139、BD140 transistors(The same batch number) .
6:) Omron G2R - 2 12V Relay 700MV Protection circuit,7 seconds delay connect function.
7:) Origianl ALPS 27 type potentiometer.
8:) 30W high quality quality Toroid Transformer.
9:) High quality grinding RCA .Full Aluminum chassis
Specifications:
Works voltage: AC115V or AC230V for choose
Front panle: Silver
Suitable for 32-600ohm headset
Input impedance 50 kΩ
Frequency response 1Hz ~ 100kHz (-3dB)
THD (total harmonic distortion) 0,002% at 170 mW / 250 Ω
Channel separation> 82 dB SNR 92 dB
Weight about 2.5kg
Size:220*52*191mm (W*H*D)
Package List:
1 × HD-8-A1-PRO Headphone amplifier （To ensure transportation safety, power input cables are not provided by default）
