Lehmann HV-4 Headphone Amplifier Kit With ALPS 27 Type Potentiometer
Note: This is a headphone amplifier kit, players need their own welding,including potentiometer.
PCB Size: 160X110X1.6mm
Works Voltage: Dual AC12-AC16V
Input impedance 47 ohms
Frequency Response 10Hz (-0.3 dB) to 35 kHz (-1 dB)
SNR> 95 dB at 0 dB gain (analogue)
THD <0.001% at 6 mW / 300 ohms
Channel Separation> 90 dB / 10 kHz
Output power 200mW / 300 ohm, 400mW / 60 ohms
1, Optimize the power supply, the original machine use LM3X7 rectifier filter supply ripple 3-5MV, the voltage amplifier stage and input stage uses electronic filter circuit, the ripple is 7MV lThis amp ower ripple of the DC stable circuit audience,This amp using stability of DC circuit full-powered, lower ripple 390UV.
3, 300MV headphones for the protection circuit.
5, High signal to noise ratio.