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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 Also check our New LED Meter Board and advanced Calibration

All our Build Guides


PriceFrom €258.84
Excluding Sales Tax
  • The SL9K-J is a DIY preamp designed to recreate the classic preamp used in the 9000J desk. This preamp section uses a super matched dual transistor AS194H for the input signal, which is almost identical to the original MAT02 used in the 9000J. The SL9K-J provides high-quality sound and exceptional performance with its carefully selected components and circuit design. With this preamp, you can enjoy a faithful reproduction of the vintage sound that made the 9000J famous. Upgrade your audio system with the SL9K-J preamp and experience the magic of the legendary 9000J sound.

    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.

    • Shipping will be calculated depending on your location
    • Standard Shipping with DHL
    • UPS Express Saver as Option in Checkout
    • Free Standard Shipping in Europe on orders over 100€

    Return of untouched Original Products is possible during a time of 14 days after receiving your article, check our Return Policy

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