BRAND: Audio Research
SERIES: Reference 7
TYPE: Line-Stage Preamplifier
OVERVIEW
The Audio Research Reference 7 is a new-generation line-stage preamplifier developed from the same ground-up platform as the flagship Reference 20. Rather than refining an existing design, it brings the company’s latest engineering advances into a more accessible reference preamplifier, with a clear focus on purity, precision and musical realism.
Designed to reveal fine detail while preserving the natural flow and texture of music, the Reference 7 delivers exceptional clarity, dimensionality and dynamic expression. Its presentation remains coherent and engaging, allowing every recording to sound vivid, spacious and emotionally convincing.
Key Features
- Developed from the same ground-up platform as the flagship Reference 20
- Multi-metal layered chassis for advanced resonance management
- Suspended, mass-loaded circuit boards for improved signal-path isolation
- Solid-state power-supply regulation for low noise and long-term stability
- Reference-grade output coupling capacitors derived from the flagship design
- Four balanced and four single-ended inputs
- Two pairs each of balanced and single-ended main outputs
- Dedicated buffered subwoofer output
- Four matched 6H30P dual-triode vacuum tubes
- Customisable input names and display colour themes
- Three display brightness levels plus display-off mode
- Processor mode, balance adjustment, mono and mute functions
- Firmware update capability via the rear USB service port
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Advanced Engineering and Musical Performance
The Reference 7 shares the advanced mechanical architecture developed for the flagship Reference 20. Its multi-metal layered chassis manages resonance through controlled energy distribution, while custom suspended, mass-loaded circuit boards help isolate the signal path from unwanted vibration. Together, these technologies preserve low-level information and enhance transparency, spatial definition and sonic presence.
Solid-state power-supply regulation contributes to an exceptionally low noise floor and improved long-term stability, while reference-grade output coupling capacitors derived from the flagship platform help maintain signal purity throughout. The Reference 7 reveals exceptional detail without compromising musical coherence, natural texture or dynamic expression—bringing each performance to life with clarity, depth and emotional realism.
TECHNICAL SPECIFICATIONS
Frequency Response:
3.6Hz to 24kHz at -1dB, 84.5kHz at -3dB
THD+Noise:
0.003% Balanced,
0.02% Single Ended
Gain – Main output:
12dB Balanced output, 6dB Single Ended output
Input Impedance:
50K ohms Balanced, 25K ohms Single Ended
Output Impedance:
600 ohms Balanced, 300 ohms Single Ended Main Out
200 ohms Balanced, 100 ohms Single Ended Sub Out
Output Polarity:
Non-inverting
Tube Complement:
(4)-6H30P dual triodes
Power Requirements:
100-135VAC 60Hz (200-250VAC 50/60Hz) 78 watts maximum.
Standby: 4.3 watts.
Dimensions:
Width 19” (48.26 cm)
Height 8 1/8” (20.64 cm)
Depth 19 1/16” (48.42 cm) including handles and rear bumpers
Weight:
59.5 lbs. (27 kg) Net; 75 lbs. (34 kg) Shipping.
