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Assembeld Class A Headphone amplifier board base on Lehman amp circuit L7-4
Item ID：ZJ-0707
List Price：US$37.00
Price：US$32.00
Payment Terms
paypal
Shipping
ship to world wide
Availability
in stock
Description
Product Q & A
Review
This is a assembled and tested headphone amp board
The Power Transistors are using A1358 C3421, Large quiescent current, the tube quiescent current is 55MA, the Class A power is increased, and the sense of hearing is more alcoholic.
PCB size:127mm*77mm. the transformer height is about 30mm.
Works voltage: AC110V or AC220V
Output impedance: 32-600ohm.
gain: 8 times
The opamp is OPA2604.
Class A headphone amp board. circuit base on the famous Lehman amp
the default price are include the M15 bingzi transformer.
Note: the A1358 C3421 Power Transistors need fixed to the Aluminum chassis Bottom plate for Radiating.
if your you are use plastic case. then need add extra heatsink for it.
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