TOPPING Mini 300 Desktop Fully-Balanced Class-D Power Amplifier — TRS & RCA Inputs, 12V Trigger, 140W×2 into 4Ω, Ultra-Low Distortion

A fully-balanced Class‑D design: the TOPPING Mini 300 uses independent, fully-balanced amplification paths for each channel to eliminate crosstalk and reduce external interference before it reaches your speakers. The result is an extremely quiet background with 124dB SNR and noise below 15μVrms, so playback is clean and transparent. Reference-grade distortion performance: Mini 300 achieves THD+N <0.0004% @8Ω 5W, preserving fine musical detail from delicate vocals to complex instrument textures for more natural, high-fidelity sound. High output for multiple use cases: this compact amp delivers up to 140W×2 into 4Ω at 10% THD+N, and 125W×2 into 4Ω at 1% THD+N — enough power and headroom for demanding Hi‑Fi listening or professional monitoring. Flexible connectivity: the rear panel provides both balanced TRS and unbalanced RCA inputs so you can connect pro and consumer sources without adapters. The front-panel switch lets you select between BAL and SE to match your source type. Convenient system integration: a 12V trigger input allows the Mini 300 to power on and off in sync with a connected DAC or preamp, eliminating the need to manually switch the amp during system use.