Ultra-compact headphone amplifier for studio and stage applications. Premium analog circuit and design offering an ultra-low noise floor, large dynamic headroom, and low distortion. Input (3.5mm/6.35mm) for 1 stereo source and outputs (6.35mm) for 4 stereo headphones. SNR (signal-to-noise ratio) >100dB. Independent level control for the 4 outputs. With a high-fidelity analog circuit. Large-gauge steel chassis and potentiometers and switches for long-term use. Powered via the included 12V adapter. Comes with 2 6.35mm to 3.5mm male-to-female adapters.