REFERENCE 5 SE Vacuum Tube Line-Stage Preamplifier

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The Reference 5 SE is the latest model in a series of the finest and most successful line-stage preamplifiers ever made. From the Reference1 to the Reference Anniversary, each one has built upon the legacy of its predecessor as the most sought-after reference level line-stage preamplifier. The Reference 5 SE clearly redefines the state of the art at a price that is not inexpensive but represents extraordinary value. Like every Audio Research product, it is made entirely by hand in our facility in Minnesota.

The Reference Anniversary has been regarded as perhaps the finest preamplifier ever built, and the Reference 5 SE has the distinct advantage of benefitting directly from that lineage.  Key component technologies derived from the Anniversary preamplifier have been incorporated into the Reference 5 SE providing even more presence, weight and definition than that of its predecessor, the Reference 5.  The Reference 5 SE possesses great bandwidth and resolving power combined with a purity and naturalness that is uncanny – grain and electronic artifacts are simply absent. Bass impact, depth and control are startling, while music ebbs and flows with a dynamic life that is rarely experienced outside the concert hall. While differences in recordings are immediately apparent, the Reference 5 SE connects you to the intent of the musicians and the soul of the performance, drawing you in. Music emerges from a totally black background because the Reference 5 SE – defying its vacuum-tube architecture – is utterly quiet. Only by hearing it for yourself will you fully appreciate the sonic advancements unveiled by the Reference 5 SE.

The aesthetic continues with the traditional look of Audio Research, adding the refinements of a redesigned front panel with metal buttons.  Both natural and black faceplates and features can be fitted to the unit, providing flexibility and customization to match the rest of a system.  The large vacuum-flourescent display continues from previous models, providing clear feedback from the unit.  The handheld remote controls all front panel functions plus other features such as balance, tube hour counter and display brightness.

The Reference 5 SE uses circuit board topology from its predecessor as well as from the Anniversary, with its transformers off the board and mounted on the sides of the chassis. The audio circuit is fully balanced, pure Class-A triode, with zero feedback. The tube complement includes four 6H30s in the analog stage, with a 6550 and a 6H30 in the power supply. Massive energy storage, double that of the Reference 5, provides tremendous dynamic capability. Total gain is 12dB via the balanced outputs and 6dB via the single-ended outputs.  Six sets of balanced and single-ended inputs, a unity gain (processor) input, and three sets of outputs are installed for ease of connectivity and flexibility.

Audio Research redefines refinement yet again with the Reference 5 SE. 

SPECIFICATIONS

FREQUENCY RESPONSE: +0-3dB, 0.5Hz to 200kHz at rated output (Balanced, 200k ohms load).
DISTORTION:  Less than .01% at 2V RMS BAL output.
GAIN: Main output: 12dB Balanced output, 6dB SE output.  Tape output: 0dB (Processor input: 0dB SE output).
INPUT IMPEDANCE:  120K ohms Balanced, 60K ohms SE.  Inputs (7): CD, TUNER, VIDEO, PHONO, AUX 1, AUX 2, 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 BAL, 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 10 kHz.
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.  Standby: 2 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.