Replacement PCB for Trace Elliot Bipolar Bear or 300W MOSFET.




300W Class D Power amp board. Drop in replacement to replace the obsolete ‘Bipolar Bear’ or the 300W MOSFET board in SM, SMX, SMC, 7-Band and 12-Band Bass Amplifiers.

The ‘Bipolar Bear’ design is known for being unreliable and almost unfixable. Trace Elliot used to offer a drop in replacement 300W MOSFET board, but ceased to do so after one of the many changes of ownership.

The board offers a number of features to make integration easy:

  • Reuses the bipolar bear heatsinks from the donor amp
  • Aligned to use the existing Trace Elliot fan.
  • Pin compatible input connector
  • Pin compatible AC input.
  • Pin compatible fan supply
  • Pin compatible speaker output
  • Because of the high efficiency of the replacement board, the Trace Elliot power supply is overrated and can be replaced with a lighter unit if required.

Because of the flexibility of the design, the board can also be ordered as a 150W module for 150 models.

Technology: Class D
Output Power: 150W or 300W into R
Input voltage
Weight: Super light!
Power consumption:

Additional information


300W, 150W

Construction Level

Bare PCB, SMT assembly, Full Assembly (no heatsink), Full Assembly (heatsink)


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