BA312-M

Each kit contains (X2) BA312-M replacement modules fitted with our SS3601 Discrete Op Amps as well as (X4) Nichicon UKA/UKT capacitors and low noise Vishay carbon film resistors. Installation instructions are provided in the kit and can also be downloaded in PDF format using the links above.

For vintage Marantz Receivers, the BA312 IC  resides on the PE-01 tone control assembly, and are always in the signal path regardless of the tone control settings.   Be sure to order the appropriate upgrade module depending on whether it is needed for Marantz (BA312-M) or Sansui (BA312-S) as they have different gains and require slightly different components to be swapped out during installation.

With this upgrade, one can expect a flatter frequency response, a reduction in Total Harmonic Distortion (THD) and a lower noise floor.   Overall, this upgrade will bring the PE01 assembly in the Marantz, to the next level of performance with a distinct improvement in overall dynamic presentation, sound stage, and frequency response across the audible spectrum while retaining their smooth characteristic sound.