Item #1164935 Model #KGB-II

A Designs KGB-II Instrument Pre Amplifier Standard


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Dual-input preamp for guitar and other high-impedance signals.

The KGB-II is a dual-input high-impedance, discrete audio preamp designed for high-impedance, unbalanced signals including guitar, bass guitar and electronic keyboards. Just as a low-impedance, balanced preamp is a tremendous benefit for your microphones signal, a preamplifier designed for use with unbalanced high-impedance instruments is also a critical component of great sound from a high-impedance sound source.

The KGB Series contains high-voltage, discrete op-amps with balanced output transformers by Cinemag, Inc. The KGB-II is a single-channel, solid-state unit that works well with guitar, bass or keyboards. It features an all-metal chassis, milled aluminum knobs, balanced XLR gold pin Neutrik outputs, Switchcraft 1/4" input jacks, bipolar electrolytic capacitors, 1% metal resistors, blue LED power indicator, four rubber feet and heat vents.
  • S/N: Better than 90dB (shorted input)
  • Output: Xfmr Balanced +4 @ 600 ohms
  • Power: 20VAC (rated) 22-27VAC (unloaded) External, +/-24VDC Internal
  • Gain: Low = 70dB, High = 90dB (2kHz source @ .775V)
  • Gain: Low = 35dB, High = 60dB (2kHz source @ .09mv)
  • Sensitivity: Lower than .09mv


  • Two discrete inputs with Thru
  • Gain Select Switches for each channel
  • High/Low- Phase Reverse Switch for each channel
  • Gain Lift switch
  • External power transformer for a very low Noise Floor
  • Balanced, line-level +4db output
  • Applications
    • Output to Line-In to FOH or Stage Monitors
    • Output to Line-In on a Recording Console
    • Output to Input of Digital Audio Converters
    • Output to Power Amplifiers