Description
Professional 80W Audiophile Mono Power Amplifier Module
The STK4042XI is the high-precision flagship of Sanyo’s 80W mono hybrid series. Engineered for clinical accuracy and absolute signal purity, the "XI" series represents the pinnacle of thick-film technology. It delivers a continuous 80 Watts of power with an industry-leading Total Harmonic Distortion (THD) of just 0.008%.
This module is the definitive choice for audiophile mono-block builds, high-end center channel restorations, and premium active monitors where zero signal coloration is required. Its advanced internal cascode and current mirror circuitry provide a noise floor that is virtually silent, ensuring every nuance of the original recording is preserved.
Key Technical Features:
- Continuous Power Output: 80W min (at 8Ω, 20Hz to 20kHz, THD = 0.008%).
- Master-Grade Distortion: 0.008% THD for unmatched sonic transparency.
- Configuration: Mono (Single Channel) in a 15-pin hybrid package.
- Frequency Response: Optimized for high-bandwidth audio from 20Hz to 50kHz (+0, -3dB).
- Operating Voltage: Recommended supply of ±45V (Absolute Maximum ±65V).
- Pin Compatibility: Pin-compatible with the 50W to 80W "XI" series (STK4018XI to STK4042XI).
Installation & Thermal Management:
Due to its high-precision architecture and 80W output, the STK4042XI must be securely mounted to a substantial, high-mass heatsink using premium thermal grease. Operating the module without a heatsink—even for a brief functional test—will result in immediate and permanent internal substrate failure.
Technician's Note: Verify that your power supply rails are healthy and balanced at ±45V. For the best performance from this "XI" series chip, we recommend using high-quality low-ESR filtering capacitors in the power stage to maintain the ultra-low 0.008% THD specification.