Benchmark HPA4 Black, Headphone Amplifier, Preamplifier with balanced and unbalanced inputs and outputs for high demands, With THX Achromatic Audio Amplifier (AAA) technology, For a realistic and fatigue-free listening experience, Precise 256-step fully balanced relay gain control in 0.5 dB steps, 100% Analogue, Touch screen for easy access to functions such as balance control, input level offset, input name, dim function, remote, etc., Headphone outputs: 1 x TRS (6.3 mm jack), 1 x XLR (4-pin), THD < -125 dB (0.00006 %), Signal-to-noise ratio: > 135 dB (A-weighted), Frequency response: -3 dB @ 0.1 Hz and 500 kHz, Output impedance: close to 0 Ohm, Max. output power: 6 W into 16 Ohm, Crosstalk: < -133 dB @ 1 kHz, -115 dB @ 10kHz (XLR4), Power requirement (nominal): 100 - 240 VAC, 50 - 60 Hz, Protection systems: DC and short-circuit detection, overcurrent, overvoltage and thermal protection, IR remote for control with optional Benchmark remote control (art. 501400 - not included in the delivery), Dimensions including feet (W x H x D): 22 x 10 x 21cm, Weight: approx. 3.7 kg, Colour: Black@+*Connections:*@+@+, 2x Stereo line input: balanced XLR, 2x Stereo line input: unbalanced, Cinch, 1x Stereo line output: balanced, XLR, 1x Stereo line output: unbalanced, RCA, 1x Mono sum output: balanced, XLR, 2x Bidirectional 12V trigger connections@+*Balanced Line Outputs:*@+@+, Distortion factor < -125 dB (0.00006%), Signal-to-noise ratio: 137 dB (A-weighted), Frequency response: -3 dB @ 0.1 Hz and 500 kHz, Output impedance: 60 Ohm, Maximum input and output voltage: 20 Vrms (+28 dBu), Crosstalk: < -133 dB @ 1 kHz, -116 dB @ 10 kHz