A Designs KGB-1tf Instrument Preamp
With the A-Designs KGB-Itf, there is no need for DI/Direct Boxes or Mic Preamps. This instrument pre-amplifier gives a +4dB transformer balanced line-level output. Plug in your guitar, bass or keyboard directly into the KGBs (Keyboard/Guitar/Bass) and they will directly drive line level inputs of DAW interfaces, effects processors, power amps and line inputs of recording or FOH consoles without the need for a microphone preamp.
The A Designs KGB-1tf is the single channel version with a three-band fixed frequency equalizer and the addition of an extra duplicate parallel transformer output (balanced) via a TRS ¼ inch phone jack. The tone controls are a modified Baxandall circuit with high/low shelving corner frequencies at 5 kHz and 180 Hz. The Midrange frequency is handled by a peaking EQ section with a broad Q centered at 1.8 kHz. Each section is capable of up to 12 dB of cut/boost.
To accommodate any instrument, the front panel features High/Low Gain toggle switches and Switchcraft 1/4-inch Input and Thru Jacks. On the rear panels are balanced XLR output connectors and toggle switches for phase flip, ground lift of XLR Pin 1 and power on/off. The KGBs are each powered by an external wall transformer of 20-24VAC (supplied US only). A modified voltage doubler circuit is used for generating the regulated +/-24 volt rails that powers the custom designed discrete Class A operational amplifier modules. Both models chassis are built of solid steel for durability. Made in the USA.
The use of CineMag output transformers allows for the use of long transmission line feeds through balanced output cables as for live sound applications. In addition, both KGBs are optimized for guitar and bass guitar pickups impedances, as well as the unbalanced outputs from electronic keyboards such as vintage synthesizers. Operation is simple and immediate for either unit. The High/Low Gain toggle switch sets the operating range depending on what source you plug in, and a single aluminum knob sets the final output level.
In the studio or on the stage, the KGB-Itf is of a no frills, no compromise audio philosophy for pure sonic capture and reproduction.
A Designs KGB-1tf Instrument Preamp Features
- All Metal Chassis
- Discrete Class A Operational Amplifiers
- Milled Aluminum Knobs
- Cinemag Transformer Balanced Outputs
- XLR Gold Neutrik Output Connectors
- Switchcraft 1/4" Phone Input Jacks
- 1% Metal Resistors
- Blue Led Power Indicator
- 4 Rubber Feet
- External 20-24VAC Power Supply (supplied US only)
- Input Gain Select Switches
- Phase Reverse Switches
- Ground Lift Switch
A Designs KGB-1tf Instrument Preamp Specifications
- S/N: Better than 90db (shorted input)
- Output: Transformer Balanced +4 @ 600 ohms
- Power: 20-24VAC Rated External
- Gain: Low = 70db / High = 90db (2 khz source @ .775V)
- Gain: Low = 35db / High = 60db (2 khz source @ .09mv)
- Sensitivity: Lower than .09mv @ 2 khz
A Designs KGB-1tf Instrument Preamp Includes
- A Designs KGB-1tf Instrument Preamp
- Power Supply
- Limited One Year Warranty
No review yet, Be first to Write a Review