Features:
Gain - 26-68 dB Gain Stepped recallable with Grayhill Switch
48V - For Phantom Power Microphones
Pol - Switches the Polarity of the Input
Pad - Enables - 20dB Pad at the Input
Low-Cut filter - 10-250 Hz (24dB/oct)
High-Cut filter - 3.5-20 kHz (24dB/oct)
Colour Module (DIYRE) - to add coloration
Output Fader -  -∞ to +12dB after Preamp
Level Meter - internal switchable After Fader or After Preamp
Peak Led - After Preamp
High quality pots (TT Electronics and Alps Alpine)
Balanced THAT1646 Output
AS194H Super Matched Transistors

Its running on +16V/-16V/+48V in the 500 API/ VPR Rack
or in the GDIY 51X Rack

More Pictures and Build Thread
GroupDIY Help Thread

Here are some listening samples
Soundcloud SL Preamp Comparison

Build Docs
Buildguide - PDF

SL4K-G91

PriceFrom €258.56
Excluding Sales Tax
  • This Preamp is a recreation of a Classic Preamp design used in a 4000G Desk. This Preamp is also the older brother of the 9000J Preamp Design. The preamp section is based on the G291 schematics and uses a super matched dual Transistor AS194H for the Input Signal. In the Original there was a MAT02 used, since the specs of the AS194H are totally close to that Original Part we use this Transistor without any difference in Sound. The Preamp design itself is a Single Differential Gain Stage Design. The Design has a super matched Input, followed by a stepped Gain Pot. The Sound of this Preamp is really intense and has a decisive character for most productions. Due to the high quality Op Amps the Preamp achieves a clear frequency response.

    The Addons of this Preamp are Peak LED and a full Meter, which can be selected Pre or Post Fader. The Fader at the End of the Preamp module gives the most flexible options to make this Preamp use in different situations. In that combination of Preamp and Fader there are already a lot of possibilities for sound colouration with the Preamp. In addition we added a variable Low and High Cut Filter, to clean up the Signal before recorded and DIYRE compatible Colour Modul Option to add another Colour to this preamp.

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