is a legend in the vintage repair community. While Sanyo stopped production decades ago, hobbyists still hunt for "New Old Stock" (NOS) modules to bring classic 90s stereo systems back to life.

The STK411-210E offers the best balance of power and thermal manageability for most home stereo applications.

The STK411-210E is a 2-channel audio power amplifier IC, capable of delivering a maximum output power of 100W per channel. This IC is designed to be used in a wide range of audio applications, including home audio systems, musical instruments, and industrial equipment. The STK411-210E is known for its high-quality audio performance, reliability, and compact design.

If anyone has a clean PDF or can confirm:

Since Sanyo discontinued these modules, many "new" units on the market are clones. Genuine units usually have sharper laser-etched text and better weight due to the metal substrate. What is the supply voltage of your transformer?