Korg GR-1

Korg GR-1 Gated Reverb

Dual Reverberators Plus a Gate Circuit: Achieve Perfectly Controlled Reverb Effects with the Korg GR-1 Gated Reverb.

Korg GR-1 Gated Reverb Details

Introducing the Korg GR-1 from 1985 at the peak of the gated reverb effect, a compact and affordable unit that offers precise control over reverb sound contour and decay time. This original gated twin reverb unit utilizes high-quality spring reverberators.

With one knob, you can control the threshold signal level for the gate to open and output the reverb, while another knob allows you to adjust the reverb decay time.

For a more customized sound, the GR-1 features a 3-band equalizer with bass, middle, and treble tone controls. Whether you use one or both of the GR-1 inputs, you can achieve stereo reverb. The dual inputs make it easy to connect both channels of your stereo keyboard or other 2-channel signal sources.

Footswitch control ensures the Korg GR-1 doesn’t interfere with your performance. Ideal for both stage and studio settings, you’ll appreciate the sound quality and the compact, rack-mountable (1U height) design of the Korg GR-1. Suitable for keyboards, drums, vocals, guitar, and overall sound enhancement, the Korg GR-1 Gated Reverb is Korg’s key to sonic innovation.

Specifications

  • Input level: -35dB / -10dB / +4dB
  • Input impedance: 6kΩ / 70kΩ / 170kΩ
  • Output level: -35dB / -10dB / +4dB
  • Output impedance: 400Ω / 1.2kΩ / 1.2kΩ
  • Frequency Response:
    • 20Hz – 20kHz, ±1.5dB (Direct)
    • 200Hz – 4.5kHz, -8dB – -6dB (Reverb, referenced to 1kHz peak)
  • Signal-to-Noise Ratio (S/N Ratio):
    • 80dB or more (Direct, IHF-A)
    • 60dB or more (Reverb, IHF-A)
  • Reverberation Time: About 2 seconds or more (gate off, at 800Hz)
  • Gate: Decay time: 0.13 – 1.3 seconds
  • Equalizer:
    • Bass: ±4dB at 200Hz
    • Middle: ±6dB at 800Hz
    • Treble: ±4dB at 4kHz
  • Control Input: Reverb on/off control (momentary switch input)
  • Power Consumption: 6W
  • Dimensions: 482mm × 44mm × 306mm
  • Weight: 3.9kg

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The details provided above are drawn from historical documents like advertising brochures or user manuals. They’re shared without bias or review. This info is given solely for your consideration, helping you gauge its usefulness to you.

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