audio research Reference 3 balanced remote-controlled Tube Preamp

Description

FULLY TESTED – INCLUDES ELECTRO-HARMONIX TUBES, REMOTE – *DOES NOT INCLUDE A POWER CABLE*

Description: Tubed, remote-controlled line preamplifier with full sets of balanced and unbalanced inputs and outputs, and Processor Loop. Tube complement: four 6H30P dual triodes, plus one 6550C and one 6H30P for power-supply regulation. Maximum voltage gain: main output (single-ended or balanced input), 11.6dB; balanced output, 5.6dB single-ended output. Frequency response: 0.2Hz–200kHz , +0/–3dB, at rated output (balanced, 200k ohms load). Distortion: <0.01% at 2V RMS balanced output. Input impedance: 120k ohms balanced, 60k ohms single-ended. Output impedance: 600 ohms balanced, 300 ohms single-ended main (2), 20k ohms minimum load and 2000pF maximum capacitance. Output polarity: noninverting. Maximum output: 20V RMS maximum balanced, 10V RMS single-ended. Rated output: 2V RMS (1V RMS single-ended) into 200k ohm balanced load (maximum balanced output capability is 30V RMS at <0.5% THD at 1kHz). Noise: 2.7µV RMS residual IHF-weighted balanced noise output with volume at 1 (106dB below 2V RMS output).
Dimensions: 19″ (485mm) W by 7″ (178mm) H by 15.5″ (394mm) D. Handles extend 1.5″ (38mm) forward of front panel. Weight: 29.6 lbs (13.5kg) net, 43 lbs (19.5kg) shipping.