HA-1A Headphone Practice Amplifier – Photo Gallery


Machining
Machining of the chassis was originally done by hand in our basement; now it’s done professionally, by a machinist with a CNC mill in his garage. We still handle design-change rework and repairs here, though. Getting this mill/drill into the basement took four strong people and a promise of beer.
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Inside the HA-1A
The innards. Careful printed circuit layout and high quality materials are critical in obtaining the HA-1A’s remarkably low distortion.
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Workbench
The sunroom is a pleasant spot for the electronics workbench. This is where all the production soldering and lab-bench testing happens, as well as prototyping and repair work.
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Assembly
Some people say our idea of quality time together is strange.
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Testing
Every unit is thoroughly tested on the lab bench using an Audio Precision analyzer, and then tested again by me playing through it.
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Completed HA-1A
The serial number is not etched on the back until the HA-1A has been fully assembled and passed testing.
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