TOPPING Mini 300 Compact Desktop Power Amplifier — Fully-Balanced Class-D, TRS/RCA Inputs, 12V Trigger, Ultra-Low Distortion, Zero-Noise Protection

The TOPPING Mini 300 is built around a fully-balanced Class-D topology, with each channel using its own independent amplification path to eliminate crosstalk and block external interference before it reaches your speakers. That architecture delivers an exceptionally quiet noise floor: 124dB SNR and less than 15μVrms of noise, so playback remains clean and transparent. Distortion is kept to a minimum—THD+N <0.0004% @8Ω 5W—preserving fine detail from delicate vocals to complex instrumentation. Power delivery is substantial: 140W×2 into 4Ω at 10% THD+N, and 125W×2 into 4Ω at 1% THD+N, making the Mini 300 suitable for demanding Hi‑Fi listening and professional monitoring. Connectivity includes balanced TRS and unbalanced RCA inputs on the rear panel (no adapters required), with a front-panel switch to select BAL or SE to match your source; balanced inputs improve interference rejection for longer cable runs while RCA maintains wide compatibility. The 12V trigger input enables automatic power on/off with your DAC or preamp for seamless system integration. For reliable operation the Mini 300 offers silent power on/off and built-in overheat and overcurrent protection to guard components against accidental damage.