Audio Research - REF150SE - 150W Stereo Tube Power Amplifier - Black - Certified Pre-Owned (Mint Condition)

The Audio Research REF150SE is one of the finest tube power amplifiers ever produced, delivering the unmistakable musicality of vacuum tubes with remarkable speed, control, and transparency. Producing 150 watts per channel from eight KT150 output tubes, the REF150SE combines effortless dynamics with exceptional resolution, creating an immersive listening experience that faithfully reproduces every nuance of the recording.

Built around Audio Research's fully balanced circuitry and premium component upgrades, the REF150SE offers outstanding soundstage depth, precise imaging, and authoritative bass while maintaining the natural warmth and realism that have made Audio Research legendary among audiophiles. Whether paired with demanding loudspeakers or high-resolution source components, the REF150SE delivers reference-level performance with exceptional refinement.

This certified pre-owned amplifier is finished in elegant Black and is in mint condition. It has been thoroughly tested to ensure it meets factory performance specifications and is ready to provide years of exceptional musical enjoyment.

FEATURES

• Certified pre-owned in mint condition
• 150 watts per channel stereo tube power amplifier
• Fully balanced circuit topology
• Eight matched KT150 output tubes
• Four 6H30 driver tubes
• Balanced XLR inputs
• Outstanding dynamics, transparency, and soundstage realism
• Exceptional low-noise performance with wide bandwidth
• Designed and manufactured by Audio Research in the USA

SPECIFICATIONS

• Power Output: 150 Watts per channel continuous (8Ω)
• Power at Clipping: Approximately 160 Watts
• Frequency Response: 0.5 Hz – 120 kHz (-3 dB at 1W)
• Power Bandwidth: 5 Hz – 80 kHz (-3 dB)
• Total Harmonic Distortion: 0.6% at rated output, <0.03% at 1 Watt
• Input Sensitivity: 2.0V RMS Balanced
• Input Impedance: 300kΩ Balanced
• Output Taps: 4Ω, 8Ω, 16Ω
• Damping Factor: Approximately 14
• Negative Feedback: 14 dB
• Slew Rate: 13 V/μs
• Rise Time: 2.0 μs
• Signal-to-Noise Ratio: Better than 114 dB (IHF Weighted)
• Power Supply Energy Storage: Approximately 1040 Joules
• Tube Complement: 8 × KT150, 4 × 6H30
• Inputs: Balanced XLR
• Output Polarity: Non-Inverting (Pin 2 Positive)
• Power Requirements: 105–125VAC 60Hz (730W rated output, 900W max, 420W idle)
• Dimensions (W × H × D): 19" × 8.75" × 19.5"
• Weight: 75 lbs