Audio Research
Audio Research Reference Two
Best tube preamplifier for audiophiles seeking rich, high-resolution sound.
Experience the pinnacle of tube preamplification with the Audio Research Reference Two. This elite component from the Reference Series delivers a significant sonic leap, offering a richer, bolder sound with unparalleled inner detail and musicality. Its design achieves high resolution through all-new audio and power supply circuits, preventing input-signal overload while preserving sonic purity. The Reference Two seamlessly integrates into modern setups with its unity-gain A-V processor pass-through, embodying Audio Research's legacy of reviving vacuum-tube designs for high-end audio.
$2999.00
Owner Satisfaction
4.7
/ 5
Category Rank
32
/ 272
#32 in Signal Processors
Price vs Category Average
-80%
Below average
Type
Vacuum-tube stereo preamplifier
/ Vacuum-tube stereo preamplifier
Who it's for
- Audiophiles seeking lifelike clarity and expansive soundstages
- Collectors prioritizing long-term reliability and premium build quality
- System builders needing flexible balanced and single-ended connectivity
Who should skip it
- Budget-conscious listeners wary of ongoing vacuum tube replacement costs
- Users with limited rack space or poor ventilation
- Entry-level hobbyists deterred by high-end legacy pricing
Performance breakdown
Sonic Transparency
Vacuum-tube circuitry delivers exceptional clarity and nuanced musical detail.
Power Supply Stability
Tube rectification and regulation ensure consistent, clean voltage for audio circuits.
System Integration
Unity-gain pass-through allows seamless blending with modern home theater setups.
Signal Purity
Advanced circuit design effectively prevents input-signal overload during high-resolution playback.
Build Integrity
Reference Series construction reflects a legacy of high-end, durable engineering.
Operational Convenience
Remote control functionality adds modern ease to a classic tube design.
Key Specs
Type
Vacuum-tube stereo preamplifier
Frequency Response
15Hz-30kHz, ±1dB
Total Harmonic Distortion
0.005% at 5V output
S/N Ratio
90dB (Aux input)
Maximum Output
25V at 1kHz
Power Supply
Tube rectification (5AR4) and regulation (6L6)
Dimensions
15 5/8" W by 5" H x 12½" D
Production Year
1998
Features
- Delivers richer sound with greater inner detail
- Powered by eight selected 6922 twin triodes
- Tube rectification and regulation in power supply
- Includes remote control for convenience
- Unity-gain A-V processor pass-through
- Elite Reference Series component design
- Offers high resolution and musicality
- Restored and verified operational status
What customers say
The Audio Research Reference Two is widely admired as a benchmark tube preamplifier, transforming the listening experience for owners. The core theme is its extraordinary sonic performance, particularly its ability to create a vast, three-dimensional soundstage with holographic imaging. Users consistently praise its transparency and surprising bass authority, delivering deep, controlled low frequencies that anchor the music. This unit successfully conveys emotional musicality while maintaining superb detail retrieval, avoiding sterile sound. Owners feel the significant investment is justified by the sonic rewards, often calling it an endgame component. Its robust build quality further solidifies its reputation as a highly refined and enduring piece of high-end audio gear.
Know before you buy
The preamplifier features a unity-gain A-V processor pass-through. This allows you to integrate your surround sound processor into your high-end stereo setup without needing to constantly unplug or reconfigure your cables.
The Reference Two is designed to provide a richer, bolder sound profile compared to standard solid-state preamps. By utilizing eight 6922 twin triodes, it emphasizes musicality and inner detail while maintaining high resolution and clarity.
Yes, the use of tube rectification and regulation is a hallmark of Audio Research's high-end engineering. This approach provides a stable, clean power delivery that minimizes noise and helps preserve the purity of the audio signal.
Yes, a remote control is included with the unit. It provides convenient control over essential functions, allowing you to adjust volume and source selection from your listening position.
The unit measures 15 5/8 inches wide, 5 inches high, and 12 1/2 inches deep. Its relatively compact footprint makes it compatible with most standard high-end audio racks and shelving units.
Each unit has been restored and verified to ensure it meets original performance specifications. You can expect the same level of reliability and sonic performance intended by Audio Research at the time of its production.
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$2999