Headphones Amp

Chuck D. Bones

Circuit Wizard
Just a simple stereo headphones amp for practicing.
I picked up some NJM2073D's at EG a while back. They're no long in production and EG is out, but I see some for sale on Amazon & ebay. There are four resistor and four caps in there for reducing the gain. If I had to do it over, I'd leave them out.


Headphones Amp V2.1 front 02.jpg

Top left jack is Mono/Right. Top right jack is Stereo/Left. I can either plug two mono cables in for stereo, one stereo cable into the Stereo jack or one mono cable into the Mono jack.
Bottom jack is the headphones output.

Headphones Amp V2.1 innards 02.jpg
 
If there's enough demand I can get a bunch of SO packages pre-mounted on adapters.
Or just design the board for SMD. These power amps should have a short path to the board for good thermal conduction and stability. Ground plane under the device will act as a heatsink. One can even put a drop of thermal grease between the device and the ground plane.
 
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