Audio Research GSi75 Integrated Amplifier

For any questions please contact Optimal Enchantment via email at [email protected] or via phone at 310-393-4434

A preamplifier, amplifier, phono stage, and digital to analog converter all in one chassis, the GSi75 combines with your favorite speaker to deliver a singular and simple solution to control your listening system. Unlike other integrated designs that make performance - sacrificing compromises to fulfill a price point or form factor, the GSi75 harnesses the power and technologies developed by Audio Research into an authoritative platform to reveal the performances in your media.

About this unit
Brand new-in-box Audio Research GSi75 Integrated Amplifier in Natural Silver finish. Unit comes factory sealed in original box and packaging with owner's manual, remote control, and power cord.

Note: Images are stock photos.

Warranty
This product is covered by an Audio Research 3-Year Limited Warranty or a 90-Day Limited Warranty (vacuum tubes). This Limited Warranty initiates from the date of purchase.

Specifications
POWER OUTPUT
75 watts per channel continuous from 20Hz to 20kHz. 1 kHz total harmonic distortion typically 1.5% at 75 watts, .05% at 1 watt. Approximate actual power available at “clipping” 80 watts (1kHz). (Note that actual power output is dependent upon both line voltage and “condition” i.e.: if power line has high distortion, maximum power will be affected adversely, although from a listening standpoint this is not very critical.) 

POWER BANDWIDTH (-3dB points)
12Hz to 70kHz.

FREQUENCY RESPONSE (-3dB points at 1 watt)
1.0Hz to 70 kHz.

INPUT SENSITIVITY
0.55V RMS Single-ended for rated output. (32.5dB gain into 8 ohms.)

INPUT IMPEDANCE
52.5K ohms Single-ended.

INPUTS
SE1, SE2, SE3, Phono, S/PDIF digital (coax RCA and Toslink), USB

MAXIMUM INPUT
10V RMS (any input).

OUTPUT POLARITY
Non-Inverting (any input).

OUTPUT TAPS
8 ohms, 4 ohms.

OUTPUT REGULATION
Approximately 2dB 8 ohm load to open circuit (Damping factor approximately 4).

OVERALL NEGATIVE FEEDBACK
4dB.
SLEW RATE
10 volts/microsecond.

RISE TIME
4 microseconds.

HUM & NOISE
Less than 1.0 mV RMS -88dB below rated output (IHF weighted, Vol down).

CONTROLS
Rotary volume (103 steps), Rotary input selector, Power, Mute, Bias.

DIGITAL SAMPLE RATES
44.1kHz to 192kHz, SPDIF and USB 2.0 HS, DSD USB 2.0 HS

MASTER OSCILLATOR
22.579mHz ±20Hz for 44.1, 88.2 & 176.4kHz. 24.576mHz ±20Hz for 48, 96 & 192kHz sample rates.

INTRINSIC JITTER
<10ps

POWER SUPPLIES
Electronically regulated Low and High voltage supplies for input stages. Automatic 40 sec. warm-up/brown-out mute.

POWER SUPPLY ENERGY STORAGE
Approximately 350 joules.

POWER REQUIREMENTS100-125VAC 60Hz (200-250VAC 50Hz)
400 watts at rated output, 600 watts maximum, 210 watts at “idle’: 1.0 watt power off.

TUBES
2-Matched pair KT150-Power Output; 2 -6H30 driver.

DIMENSIONS
Width 19.0” (48.3 cm) x Height 10.37” (26.3 cm) x Depth 20.41” (51.8 cm)

WEIGHT
55 lbs (25.0 kg) Net.; 78 lbs (35.4 kg) Shipping