Standard HiFi Output: Experience pure sound with this HiFi amplifier, which supports precise volume adjustments and delivers a standard HiFi output. Enjoy full lossless audio without any sound coloring, thanks to the -96 to 0 dB balance potentiometer mode that ensures clarity and fidelity in every note. Fully Distortion-Free: This amplifier guarantees a distortion-free experience. With the volume set to 0 dB in the 4-in-1 switch mode, the original state of the input signal is preserved without any distortion. Seamlessly switch between the 4-channel input signals while maintaining pristine audio quality. 0-31.5 dB Preamp Mode: The amplifier circuit automatically activates when the volume exceeds 0 dB, offering up to 31.5 dB of amplification. This allows for up to 10 times amplification, making it perfect for direct connection to a post amplifier for pre-stage use, enhancing your audio setup with powerful sound. STC High-Speed Master Control CPU: Equipped with an STC high-speed main control CPU, this switch amplifier ensures that input channels and volume data are saved instantly. The memory function allows for quick restarts, providing a seamless and efficient user experience. Independent ST Regulator: The multi-channel input stereo amplifier features an onboard 3-way independent ST regulator. This design provides independent isolation to eliminate interference and crosstalk noise, ensuring that your audio remains clear and uninterrupted.