If you own an Audionote M1 preamplifier and are experiencing issues with its power transformer, the 23S2 model is the ideal solution. Designed as a fully compatible replacement for the M1, this transformer was developed through reverse engineering of the original Audionote component. While the original transformer performs well, it is prone to occasional failure. One of its main weaknesses is the lack of insulation between the secondary sections, with the three windings stacked directly on top of each other without proper separation.

Click here to see how I restored and repaired an M1 unit…

The original M1 transformer

The 23S2 transformer installed in place

The new 23S2 transformer is built with a slightly larger core to ensure improved reliability and mechanical strength. Furthermore, each secondary winding is now properly insulated, providing a significant upgrade in safety and long-term durability. With identical voltage and current ratings to the original model, the 23S2 serves as a perfect drop-in replacement, preserving the original specifications of your Audionote M1 preamplifier.

By choosing the 23S2 transformer, you’ll not only restore your Audionote M1’s full performance but also gain greater reliability and extended service life. If you’re interested in purchasing the replacement unit or having your M1 repaired, click here to contact me.