Description
Audiophile-Grade 20W Stereo Power Amplifier Module
The STK4131V is a high-fidelity thick-film hybrid integrated circuit from Sanyo's legendary STK series. This "V" variant is a premium upgrade over the standard II series, specifically engineered for ultra-low total harmonic distortion (THD) and superior sound clarity.
Delivering 20W + 20W of continuous power, this module is found in high-end vintage stereo systems where audio precision is paramount. Its internal current mirror circuit allows for an impressive 0.08% THD, providing a significantly cleaner output for critical listening.
Key Technical Features:
- Continuous Power Output: 20W + 20W (at 8Ω, THD = 0.08%)
- Low Distortion: Audiophile-grade 0.08% THD for transparent audio reproduction.
- Configuration: 2-Channel Stereo (18-Pin SIP Package).
- Operating Voltage: Recommended ±23V (Absolute Maximum ±34.5V).
- Built-in Features: Integrated muting circuit to suppress power-on/off shock noise.
Installation & Thermal Management:
The STK4131V features a built-in metal backplate for heat transfer. It must be securely mounted to a proper heatsink using high-quality thermal grease. Ensure the power supply is stable and within the recommended ±23V range to maintain the ultra-low distortion characteristics of the "V" series.
Compatibility Note: While pin-compatible with the STK4131II, the "V" version provides a noticeable improvement in sound quality and is the preferred choice for high-fidelity restorations.