The production material of the GI6B*3 amplifier.
Left under, blue copperplate.The lower right, PCB board.
Center, aluminum box.
Piling up and choose sheet copper, PCB board measure on,an aluminum box
the hole is opened.
Picture of each material that was processed.
The hole for the air flow of GI6B is processed.
Grid of GI6B the picture of the place that attached such a finger stock