Violectric HPA V550 Pro

Powerful headphone amplifier with preamplifier function and 256-step relay. Remote control for volume, mute, input selection, resampling, and output selection. Motorized volume control with 256-step relays, balance control, and three analogue stereo inputs: two unbalanced via Cinch and one balanced via XLR. It features +/- 18dB pre-gain for optimal adjustment to the source and headphones, four powerful amplifiers, 6400 mW Pmax at 50 Ohm, and 21V RMS at 600 Ohm. There is monitoring of the headphone outputs for DC voltage and overload, with separately switchable headphone path and line-out path. Headphone outputs include two unbalanced with 6.3mm jack and one balanced with 4-pin XLR. Line out consists of one unbalanced via RCA and one balanced via XLR, with adjustment of the line-out signal to the following devices in the range of +/- 18dB. It also includes two toroidal transformers and over 35,000 uF filter capacity.