Reference 5 Vacuum Tube Preamplifier

The REF 5 is the latest model in a series of the finest and most successful line-stage preamplifiers ever made.

From the REF1 to the REF2 to the REF3 to the REF5, each one has built upon the legacy of its predecessor as the most sought-after reference level line-stage preamplifier.

Rear Panel View: Reference 5 Vacuum Tube Preamplifier
FREQUENCY RESPONSE: +0 -3dB 0.2Hz to 200kHz at rated output. (BALANCED, 200k ohms load.)
DISTORTION: Less than .01% at 2V RMS Balanced output.
GAIN: Main output (SE or BAL input): 12dB Balanced output, 6dB Single Ended output.
Tape output: 0dB. (Processor input: 0dB Balanced.)
INPUT IMPEDANCE: 120K ohms Balanced, 300K ohms SE, Inputs (7): CD, TUNER, VIDEO, PHONO, AUX1, AUX2, PROCESSOR. (XLR and RCA connectors).
OUTPUT IMPEDANCE: 600 ohms Balanced, 300 ohms SE main (2), 20K ohms minimum load and 2000pF maximum capacitance. Outputs (3): 2 main, 1 tape (XLR and RCA connectors).
OUTPUT POLARITY: Non-inverting.
MAXIMUM INPUT: 20V RMS maximum Balanced, (10V RMS SE).
RATED OUTPUTS: 2V RMS (1V RMS SE) into 200K ohm balanced load (maximum balanced output capability is 30V RMS at less than 0.5% THD at 1kHz).
CROSSTALK: -80DB or better at 1kHz and 10kHz.
CONTROLS: Volume (104 steps), Select Input. Push Buttons: Power, Proc, BAL/SE, Mono, Invert, Mute.
POWER SUPPLIES: Electronically regulated low and high voltage supplies. Automatic 40 sec. warm-up/brown-out mute. Line regulation better than .01%.
NOISE: 1.7uV RMS residual IHF weighted balanced equivalent input noise with volume at 1 (109dB below 2V RMS output.)
TUBE COMPLEMENT: (4) -6H30P dual triodes, plus (1 each) 6550C and 6H30P in power supply.
POWER REQUIREMENTS: 100-135VAC 60Hz (200-270VAC 50/60Hz) 130 watts.
DIMENSIONS: 19" (48 cm) W x 7" (17.8 cm) H (standard panel) x 15.5" (39.4 cm) D. Handles extend 1.5" (3.8 cm) forward of the front panel.
WEIGHT: 30.4 lbs. (13.9 kg) Net; 41.6 lbs. (19 kg) Shipping.