This is my other project using IC LM3886. A complete LM3886 amplifier with tone control(Bell Bifet HK201), subwoofer filter (Bell BE-SW2075), and speaker protector(Bell HD 40A). Except PCB for ic LM3886, all using the available cheap kits I mention above.
Standard component in the tone controller gain more attention, I replace it with better components. In addition, all coupling capacitors replaced using MKP capacitors.
Here are some photographs…
2.1 Home Audio System. Using LM3886 chips, with the best value audio grade components in the market.
Tone Control Upgrade
Assembled Components on standard HK201 Tone control. The result is not too bad .
Except regulator, almost all part i replace, include op-amps.
It looks nice…
Testing and Checking
Some people said this tone control is noisy, but I think I succed to reduce the noise to a low level.
Some test is important to achieve a good result.
When its all done, I send it to a very nice person in Gresik East Java.