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Audio Research GSPre Stereo Valve Amplifier

code: AUDIORESGSPRE
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This item cannot be ordered online. If you are interested please click on the Ask a Question button below.

The GSPre is the nerve center of a system – not only directing signals and providing attenuation, but also interpreting and deciphering complex signals to create a musical story with the drama and intrigue befitting your favorite songs.

The job of a preamplifier is to do its work discretely, leaving the musical signal with as little signature as possible yet still unraveling the chapters that comprise the lyrical narratives of the source material. With decades of expertise creating some of the finest preamplifiers ever produced, the GSPre is certain to continue the legacy on which Audio Research has built its reputation.

This item cannot be ordered online. If you are interested please click on the Ask a Question button below.

The GSPre is both a line stage and phono stage, with programmable functionality and flexibility, making it the perfect solution to adapt and grow in your system. The phono stage is no mere afterthought, but a separate, vacuum tube-powered circuit  providing enough gain for a variety of phono cartridges. When listening conditions require a more personal experience, the GSPre also has a headphone amplifier capable of driving a range of headphone impedances. The front panel layout is designed to simply and clearly display all functions and information, and integrates beautifully with the rest of the chassis and the G-Series amplifier.

Features:

 

  • Stereo Vacuum tube Line and Phono preamplifier with Headphone amplifier in one attractive package
  • Pure Class-A differential amplifiers in the Line stages, no feedback
  • Pure Class-A SE amplifiers in the Phono stages, no feedback
  • VF display with Blue LED's for Phono Loads and mode selected, and rotating Volume & Input Select encoder
  • Hand held IR Remote and RS-232 and remote IR inputs for whole home audio system
  • Balance and SE input/output
  • 7 levels of voltage regulation and a low noise R-core power transformer
  • Phono stage features low noise JFET inputs and 6H30 outputs as well as programmable loading
  • Line stage features low noise JFET inputs and 2 parallel 6H30 outputs
  • Features custom designed coupling capacitors in the line and phono stages
  • +12v trigger output to turn on power amplifier and other system components
  • Low distortion vacuum tube headphone amplifier designed for driving a wide impedance range, 30-300 ohms
  • Removable 15A IEC power cord

 

Technical Specifications:

Frequency Response

 

  • Line: +/-.3dB 2Hz to 80kHz; : -3dB 0.8Hz to 220KHz
  • Phono: +/- 0.1dB of RIAA 10Hz to 20KHz, +/-0.4dB 5Hz to 80KHz
  • Headphone: +/-0.05dB 20Hz to 20KHz; : -3dB 0.8Hz to 220KHz

 

THD+N @ 1KHz

 

  • line: <.002% at 2V RMS, Bal output
  • Phono: <.005% at 3V RMS output, to Record output
  • Headphone: <.009% at 1V RMS output

 

GAIN @ 1KHz

 

  • line: 13.8 dB, Processor: 0dB
  • Phono: 58dB @ 1KHz to Record output
  • Headphone: 11.3dB

 

Noise (A-Weighted)

 

  • line: <-101dBV volume at max
  • Phono: <-77dBV to Record output
  • Headphone: <-88dBV volume at max

 

Channel Separation @ 1KHz

 

  • line: > 75dB Balanced output
  • Phono: >70dB to Record output
  • Headphone: >60dB

 

Signal To Noise Ratio @ 1KHz, A-Weighted

 

  • line: >125dB Balanced output
  • Phono: >94dB to Record output
  • Headphone: >110dB

 

Input Impedance

  • 150K ohms Balanced, 75K ohms SE; Phono impedance programmable (100, 200, 500, 1000 or 47K ohms w/200pf unbalanced)

Output Impedance @ 1KHz

  • 500 ohms Balanced, 250 ohms SE; <.05 ohms Headphone SE

Maximum Input

  • line: 12V RMS Balanced, 6.0V RMS SE
  • Phono: 11mV RMS at 1KHz

Rated Output

 

  • line: 2V RMS (1V RMS SE) into 200K ohms balanced load (maximum balanced output capability is 15V RMS at less than .5% THD+N at 1KHz)
  • Phono: 0.5V RMS into 200K load, Max output same as Line stage
  • Headphone: 6V RMS maximum into 30 to 300 ohm load

 

Controls

  • Volume, Input Selector
  • 5 Push Buttons: Power, Mute, SPKR Off, Mono, Menu
  • Rear; RS-232 control, Remote IR input & Remote Trigger out

Power Supplies

  • Electronically regulated low and high voltage supplies
  • Automatic 45 sec. warm-up & brown-out mute
  • Line regulation better than .01%

Tube Complement

  • (6) 6H30P dual triodes

Power Requirements

  • 100-125VAC 60HZ (200-250VAC 50/60Hz) 105 Watts.  Standby: 1.5 Watts

We endeavour to despatch same day (for orders placed up to 2pm) on available stock items to the vast majority of UK mainland addresses. Please remember to check with us first for a physical stock check if next day delivery is important to you.

UK ORDERS:  We despatch the bulk of our UK mainland items on a 24 hour service – Free of Charge.  Free delivery also applies to the Isle of Man, Isle of Wight, the Scilly Isles, the Scottish highlands and Islands, the Channel Islands and Northern Ireland but may take a day or so longer. Smaller items are delivered using Royal Mail recorded delivery or special delivery. Larger items are delivered using a courier service such as Interlink Express, DPD, UPS or DHL. 

INTERNATIONAL ORDERS: We offer competitive rates which can be confirmed by email. Please just ask – we will need a full delivery address and telephone number. Smaller items are delivered using Royal Mail Small Packets Airmail with International Tracked and/or Signed depending on value of item and availability of the service. Larger International shipments are sent by insured and tracked services using DPD, DHL or UPS. If there are any delays due to specific customs regulations, etc, you will be contacted by Hifisound or by the courier with a request for any further information required. Customs duties do not apply for shipments into any EU country (for a full list please refer to the EU Country List). Customs duties can apply for countries outside of the EU. Customers in these countries are responsible for all taxes and duties incurred when the items enter their country.

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