Hifi Lehmann circuit Headphone amplifier board suitable for SENNHEISER HD580/HD600/HD650 etc headset

Name: Hifi Lehmann circuit Headphone amplifier board suitable for SENNHEISER HD580/HD600/HD650 etc headset
Brand: FYFAUDIO
SKU: WZ-28 莱曼耳机放大器 （成品板）
Price: 108 USD
Availability: InStock

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~~$135.00~~ $108.00

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Description

Frequency Response: 10Hz (-0.3db) - 35KHz (-1db)
Distortion: < 0.001% (6mW/300Ω)
Signal-to-noise ratio: >95db
Output power: 200mW(300Ω)/400mW(60Ω)
Power consumption: <5W
Input Impedance: 47kΩ
Adaptation impedance: 8-2KΩ
LINE OUT: 60Ω
PHONE OUT: 5Ω
PCB Size: 158mm*137mm

works voltage: Dual AC15-18V (such as AC18V-0-AC18V)

The assembled board has been installed and debugged well. it with genuine ALPS27 potentiometer

this board also can be used as a preamp board.

the package will come with BOM and schematic.

BOM for PCB:

Resistors: 3Ω3x4, 10Ωx4, 100Ωx3, 47Ωx10, 680Ωx2, 1K5x4, 2K2x2, 4K7x4, 15Kx1, 2K precision adjustable x2
50KA double potentiometer x1
Capacitor: 100Px2, 1000Px1, 0.1uFx14, 1.5uFx2, 470uF/25Vx6, 4700uF/25Vx2
MUR820 fast recovery diode x4
3mmLED light-emitting tube x3
BC550/BC560x2 pair
BD139/BD140x2 pair
LM317x1, LM337x1
OPA2134x1
5.08mm pitch 3P terminal block x3
2P DIP switch x2
6.35mm headphone holder x1