Features:
Gain - 16-68 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

SL9K-J

PriceFrom €274.84
Excluding Sales Tax
  • This Preamp is a recreation of a Classic Preamp design used in a 9000J Desk. The preamp section is based on the 9000J 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 of that huge Preamp. The Preamp design itself is a Dual Stage Preamp Design. Due to the super straight Input design and the full symmetrical use of high quality Op Amps the Preamp achieve fast transients and a clear and transparent frequency response. Instead of a Gain pot we are using a stepped Grayhill Switch and make this Preamp full recallable.

    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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