Amplifier for a keyboard instrument

This design of an amplifier for a keyboard instrument is based on kit AVT2180. Housing was made of 22mm thick chipboard. Supply transformer 2x25V. The output power gained is approximately 2x50W RMS. The device uses subwoofers 8” from Beyma and twitters Monacor DT 300.

Small size of the construction was its main assumption and because of that its dimensions are: 50x50x25. Dome tweeters are placed above the subwoofers. Grids removed from computer fans form a protection of the domes. Chips were screwed to the tunnel heat sink Fischer, which is equipped with fan that switches on when temperature of the heat sink reaches 70 degrees Celsius. Jack connector makes it possible to remove whole board with the amplifier without the use of soldering machine, if you need to.
The back of the device is covered with mdf board with holes on the top for better ventilation.
The entire amplifier weighs 23,5kg.



Link to original thread - Piecyk pod instrument klawiszowy