Audio Research GS150 Tube Amplifier - WOW

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Possibly the best looking tube amp ever made with just the right mix of American industrial engineering and Italian flair.

Modern KT150 Tubes ensure the best sound possible from a high power tube.

$20,000 MSRP makes this carefully owned piece a great value.

We just serviced the amp to ensure perfect operation.

Notes from our lab:
• Replaced V6 Bias Sense Relay
• Confirmed tubes operating at approx 65mA when meter is on the bias line.
• Calibrated Meters
• Biased tubes near identically
• Tested to full output power
• Bench Listening Test

This GS150 will ship in its original box to ensure safe transport

Click below to add our recommended matching cables from Kimber Kable, all brand new as SkyFi is an official Kimber dealer.

Kimber Kable - RCA Interconnects

Kimber Kable - XLR Interconnects

Kimber Kable - Speaker Cables

Kimber Kable - Bi-Wire Speaker Cables

Kimber Kable - 14AWG (Gauge) Power Cords

Kimber Kable - 10AWG (Gauge) Power Cords

More from Audio Research:

An amplifier is the workhorse of any system – it is responsible for receiving small signals from a preamplifier or source component, and developing them into larger currents to control a loudspeaker. To that end, the GS150 has been designed to seamlessly integrate into any system and steadfastly perform its task. Challenging source material and difficult speaker loads are met with control and finesse to present a musical landscape of breathtaking proportions.

Three meters across the front panel provide a window into the operation of the amplifier and give the amplifier a striking façade. The selection of premium parts internally is reflected in the beautiful metalwork of the chassis and exquisite finishes. The circuit is design features the new KT150 power output tubes for 150 watts of effortless power delivery. A reflection of the past yet clearly a guiding light into the future of music reproduction, the GS150 is poised to deliver years of musical enjoyment.

Audio Research GS150 Stereo Tube Power Amplifier

Specifications:
INTRODUCED
2014

POWER OUTPUT
155 watts per channel continuous from 20Hz to 20kHz
1kHz total harmonic distortion typically 0.6% at 155 watts, below 0.03% at 1 watt
Approximate actual power available at ‘clipping’ 160 watts (1kHz)

POWER BANDWIDTH
(-3dB points) 5Hz to 80kHz

FREQUENCY RESPONSE
(-3dB points at 1 watt) 0.5Hz to 120 kHz

INPUT SENSITIVITY
2.0V RMS BAL for rated output.
(24 dB Bal gain into 8 ohms.)

INPUT IMPEDANCE
300K ohms Balanced

OUTPUT TAPS
8 ohms, 4 ohms

OVERALL NEGATIVE FEEDBACK
14dB

SLEW RATE
13 volts/microsecond

RISE TIME
2.0 microseconds

HUM & NOISE
Less than 0.1mV RMS – 114dB below rated output
(IHF weighted, input shorted)

POWER SUPPLY ENERGY STORAGE
Approximately 1040 joules

POWER REQUIREMENTS
105-125VAC 60Hz (210-250VAC 50Hz)
730 watts at rated output
900 watts maximum
420 watts idle

TUBE COMPLEMENT
(4 matched pair) KT150 power output
(4) 6H30 driver

OTHER
Output Polarity Non-inverting
Balanced input pin 2+ (IEC-268)

Controls:
Rotary selector for tube bias
Power on/off
Fan speed
Auto shut-off on/defeat
RS232
12V trigger

DIMENSIONS
Width 19” (483 mm)
Height 9-7/8” (251 mm)
Depth 22-1/2” (572 mm)

WEIGHT
87 lbs. (39.5 kg)