Inputs (4): Stereo on dual RCA jacks, > 10 kΩ, -10 dBV nominal, +10 dBV max. Level control: Off to +12 dB gain Outputs (3): Stereo on dual RCA jacks (line level, -10 dBV nominal, +10 dBV max. fixed, +17 dBV max. variable), 1/4â€? (6.3 mm) TRS or Mini jack (2 headphone, 35 mW, 100 Ω load) Frequency Response: 10 Hz to 20 kHz (line output ±0.05 dB, headphone output ±1.25 dB, 100 Ω load) THD+N: < 0.03% (line output), < 0.1% (headphone output, 10 mW, 100 Ω load) Crosstalk: < -70 dB (1 kHz) Noise: < -100 dB (headphone, below 10 mW output, 100 Ω load) Noise: < -80 dB (variable output, below -10 dBV, unity gain), < -95 dB (fixed output, below -10 dBV) 24 Vdc power supply current: 40 mA (idle), 50 mA (max.) Case dimensions: 5.75â€? (14.6 cm)W x 5â€? (12.7 cm)D Mounting size: 1/3 rack width