This product circuit refers to Lehmann earphone amplifier, a well-known earphone amplifier, is known as the best partner of sennheiser HD650. It has a good reputation in European and American sound exhibition and professional audio studios. The amplifier comes with a two-channel 6.35mm headphone output port. With 300 ohm headphones, the output power is 200mW. With 60 ohm headphones, the output power is 400mW. The frequency response range is between 10Hz and 35kHz, and the signal-to-noise ratio is above 95dB. The excellent sound quality is well received in the industry.
Size: 114*297*46mm.
Net weight: 1.35kg.
Weight after packing: 1.8kg.
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Texas Instruments OPA2134PA.
![](https://ae01.alicdn.com/kf/H71dfc73cc15d4750b0f51ebb5292683bD.jpg)
Japan ALPS 27 potentiometer.
![](https://ae01.alicdn.com/kf/H1736f161bb7b411d9f7544e18757b8ccM.jpg)
TALEMA audio transformer.
![](https://ae01.alicdn.com/kf/Ha5b6e2e0ec354147a5df2b4dd69f518dt.jpg)
BD139-16, BD140-16.
![](https://ae01.alicdn.com/kf/H371cefa0e58a47618693aa15b7b838bdk.jpg)
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Input on the left, output on the right, American CMC RCA terminals.
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Packing list: headphone amplifier*1. (No power cord and other signal cables)