Description
Efficient 2-Channel Stereo Audio Power Amplifier
The STK4131II is a high-reliability thick-film hybrid integrated circuit from Sanyo. Designed for split power supply audio systems, this module provides a clean 20W + 20W stereo output, making it an essential component for restoring vintage receivers or powering high-quality desktop audio setups.
As a "Series II" module, it features an improved internal constant current circuit that ensures low harmonic distortion and a built-in muting circuit to prevent audible "pops" during power cycling.
Key Technical Features:
- Continuous Power Output: 20W + 20W (at 8Ω, THD = 0.3%)
- Configuration: 2-Channel Stereo (18-Pin SIP Package)
- Frequency Bandwidth: High-end response up to 50kHz.
- Operating Voltage: Recommended ±23V (Maximum ±34.5V).
- Thermal Technology: Uses Sanyo’s IMST (Insulated Metal Substrate Technology) for superior heat dissipation.
Installation Requirements:
This IC requires a substantial heatsink and high-quality thermal grease for safe operation. Ensure that the mounting surface is completely flat to allow for maximum thermal contact and to prevent premature failure of the internal transistors.
Check your power supply rail voltage and capacitor health before installing the replacement IC to ensure a long-lasting repair.