A-Designs KGB-1TF
Mono Instrument Pre-Amp

The A-Designs KGB-1TF, like their KGB-II, is a single-ended, high input impedance, discrete audio pre-amp designed for high impedance, unbalanced outputs such as guitar, bass guitar, and electronic keyboards. In the same way that a low impedance, balanced pre-amp is needed (for use with microphones), a pre-amplifier designed for use with unbalanced high impedance instruments is also required. The KGB Series contains high voltage, discrete op-amps with balanced output transformers by Cinemag, Inc.

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
• Both devices provide a Balanced, Line-Level +4db Output - allows for bypass of the typical DI, Microphone Preamplifier and other input stages

A-Designs KGB-II Features: 

• 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
• 4 Rubber Feet
• Heat Vents
• Single Discrete Input with Thru
• Gain Select Switch - High/Low
• Phase Reverse Switch
• Ground Lift Switch
• External Power Transformer for a very low Noise Floor
• Three Band fixed frequency Tone Filter with 12db cut/boost -High/Mid/Low

A-Designs KGB-II Specifications:

• 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