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Summary of Contents for Audio Research GSPre
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Page 1: User Guide
H I G H D E F I N I T I O N ® GSPre Stereo Preamplifier User Guide... - Page 3 Thank you for choosing the GSPre to be a part of your high performance music listening system. Since 1970, Audio Research has been creating some of the world’s finest audio equipment. Each piece is handcrafted in Minnesota, and has been designed to provide many years of listening enjoyment.
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Page 4: Table Of Contents
Contents Warnings Installation Before Operating the GSPre In Your System Connections Back Panel Connections Input Connectors Output Connectors A.C. Power Connection Operation RS-232 Control Front Panel Controls and Displays IR Input Start-Up 12V Trigger Jack Shut-Down Break-in Front Panel Controls... -
Page 5: Warnings
This unit is RoHS compliant. expose your GSPre to rain or moisture. The GSPre also has automatic muting to help protect Do not place objects containing water on top of this unit. system components in the event of low line voltage. -
Page 6: Installation
GSPre in their proper locations in the chassis. Note that the numbers written on each tube correspond to a ‘V’ number etched on the chassis next to each tube socket. -
Page 7: In Your System
Do not stack components or other objects directly on top Due to its weight, this preamplifier must be supported of the GSPre. on a surface specifically rated for such a load. Check with the manufacturer of your support system to be sure it is rated to handle this weight. -
Page 8: Connections
Connections Back Panel Connections Inputs Main Outputs Fuse Trigger Holder A.C. Power IR Input Connector RS-232 Connector... -
Page 9: Input Connectors
IR Input with your preamplifier. Audio Research recommends a The IR input can be used to link the GSPre to an IR repeater phono cartridge within an output voltage range of 0.5 mV system with a standard mono 1/8” connector. -
Page 10: Front Panel Controls And Displays
Operation Front Panel Controls and Displays Input Volume Select Control Power Function On/Off Buttons side panel Headphone Output Cartridge Function Impedance Menu Button Indicators... -
Page 11: Start-Up
The GSPre should be turned on before the amplifier during which ‘MUTE’ will flash on the display. After the in your system. If the GSPre is turned on after the warm-up sequence is complete, the unit will be muted. amplifier, it will amplify any extraneous turn-on Depress the front panel ‘MUTE’... -
Page 12: Front Panel Controls
Operation Front Panel Controls Menu The GSPre has two microprocessor-driven rotary controls The menu button enters the setup menu of the GSPre to and five buttons (Power, Menu, Mono, Speaker Off, and allow customizing certain settings of the preamplifier. Mute). -
Page 13: Remote Only Functions
‘Phono’ input is selected. buttons on the remote. Note that when the display To match the impedance of the GSPre with your is completely dimmed, a small square appears in the cartridge, refer to the specifications included middle of the display to indicate the unit is powered on. - Page 14 Operation Balance The Balance control adjusts the output from center position to the left or right channels, which in turn will shift the center point of the sonic image. This is useful in the event the main listening position is not centered between the speakers, or can help with certain room anomalies.
- Page 15 ‘OKAY’ for five seconds for five seconds, the GSPre reverts back to its normal before reverting back to the normal operation screen. operation screen. Continuing to press the ‘Menu’ button...
- Page 16 Settings Menu continued... Processor On/Off The SE3 input of the GSPre can be selected as a standard, Auto Shutdown volume-controlled input like the other inputs, or it The GSPre is equipped with an auto shut off can be set as a ‘unity gain’ processor input. This is...
- Page 17 ‘CONFIRM?’: Tube Hours The tube hours display shows the accumulated time the GSPre has been powered on. This is useful for determining the number of usage hours of the Then press ‘MUTE’ a second time to reset the counter.
- Page 18 Caution Cleaners containing abrasives should not be used Your GSPre preamplifier contains sufficient levels of as they will damage the anodized finish of the voltage and current to be lethal. Do not tamper with a front panel.
- Page 19 Warranty Audio Research Corporation products are covered by a The specific terms and remedies for fulfillment of 3-Year Limited Warranty or a 90-Day Limited Warranty the Limited Warranty may vary from country to (vacuum tubes). This Limited Warranty initiates from country.
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Page 20: Specifications
Specifications Frequency Response: Output Impedance @ 1kHz: 500Ω Balanced, Line: ±0.3dB 2Hz to 80kHz; : -3dB 0.8Hz to 220kHz 250Ω SE; <0.05Ω Headphone SE. Phono: ±0.1dB of RIAA 10Hz to 20kHz, ±0.4dB 5Hz to 80kHz Headphone: ±0.05dB 20Hz to 20kHz; : -3dB 0.8Hz to 220kHz Maximum Input: Line: 12V RMS Balanced, 6.0V RMS SE. - Page 22 D E F I N I T I O N ® 3900 Annapolis Lane North Plymouth, MN 55447 www.audioresearch.com Specifications subject to change without notice. ©2014 Audio Research Corporation. Reproduction of this document in part or whole is expressly forbidden without written consent from Audio Research Corporation.
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