Unison Research Reference Pre Tube Preamplifier
Top Pick
Unison Research

Unison Research Reference Pre Tube Preamplifier

4.8

Best high-end tube preamplifier for audiophiles seeking pure analog sound.

This dual-chassis masterpiece brings the lush, harmonic richness of 300B valves to the forefront of your system. It demands significant rack space and a commitment to tube maintenance, but the reward is an uncompromising, holographic soundstage that few modern designs can touch.

$17748.51

In stock

at

Reverb

Who it's for

  • Purists demanding premium components for long-term signal integrity
  • Audiophiles seeking rich, musical, and expansive tube-driven sound
  • Design enthusiasts valuing Italian craftsmanship and noise-reducing dual-chassis construction

Who should skip it

  • Budget-conscious listeners seeking high-end performance without the premium price
  • Users preferring low-maintenance gear without periodic tube replacement needs
  • Owners with limited rack space or poor ventilation for heat

Performance breakdown

Sonic Warmth

The 300B valve configuration delivers an exceptionally rich and organic soundstage.

Excellent

Channel Separation

Dual mono chassis architecture eliminates crosstalk for precise, immersive stereo imaging.

Excellent

Build Integrity

Meticulous construction and substantial weight reflect uncompromising high-end engineering standards.

Excellent

Phono Versatility

Independent phono stages provide audiophile-grade performance for dedicated vinyl playback.

Excellent

Signal Transparency

Pure Class A operation ensures minimal distortion across an expansive frequency range.

Excellent

Connectivity Depth

Comprehensive XLR and RCA options accommodate complex, multi-component reference systems.

Excellent

Key Specs

Type

Valve preamplifier, dual mono, two chassis

Valves

2 x 300B, 2 x ECC82, 4 x ECC83, 6 x 6C45P

Phono Valves

4 x 6C45P, 2 x ECC83

Class

Pure Class A

Inputs

4 RCA, 2 XLR, 1 tape, 2 independent phono

Outputs

1 RCA, 1 XLR, 1 tape (active), 1 subwoofer (active), Power-on link for REFERENCE Power

Output impedance

500 ohm

Input impedance

47 kOhm (Line); Selectable resistance and capacitance (Phono)

Pre Gain

20dB

Phono Gain

45 – 55 dB

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Unison Research Reference Pre Tube Preamplifier

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