The STK-500 AV/ HI-FI audio amplifier is a multi-functional and intelligent product with low cost and high quality. It features automatic power on and timed delay power off, intelligent heat dissipation, automatic mute and noise reduction, and automatic level suppression to prevent damage from abnormal signals.
This manual describes the STK-500 AV/HI-FI high‑fidelity audio power amplifier, covering its features such as automatic power‑on, intelligent cooling, mute, and level‑suppression functions. It includes detailed connection diagrams, panel and rear‑panel descriptions, and instructions for using the built‑in digital reverberator, equalizer, and bass‑boost circuits.
The document also lists the accessory kit, safety warnings, and the basic electrical parameters of the main and center amplifiers. Users can find step‑by‑step procedures for connecting speakers, audio/video sources, and the optional AC timed‑output port for small external devices. This manual is written in Chinese.
| Main amplifier output power | 200 W ×2 |
|---|---|
| Main amplifier intermodulation distortion | 0.004 % (7 kHz) |
| Main amplifier frequency response | 20 Hz‑20 kHz |
| Main amplifier signal‑to‑noise ratio | 95 dB (1 kHz) |
| Center amplifier output power | 80 W |
| Center amplifier THD | 0.03 % (20 Hz‑20 kHz) |
| Center amplifier intermodulation distortion | 0.004 % (7 kHz/60 Hz) |
| Center amplifier signal‑to‑noise ratio | 110 dB (1 kHz) |
When a music signal greater than 0.3 VRMS is received on the dedicated port, the built‑in driver triggers an electronic switch that automatically starts the main power.