Input Transformer 1:10 Input Transformer Turn Ratio
Options with same footprints (AVD Audio BT1019-PCB, Cinemag CM-75101A, Link Audio LA7510)
Balanced Transformer Output based on a 2503 Transformer (CAPI EA2503, AVD Audio 2503, UTM3503, Cinemag CMOQ-2S, Link Audio LA2503)
DOA Sockets - Add your favourite DOA to this Preamp
Gain - 26-60 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
T-Pad Output Attentuator Fader - -∞ to +0dB after Preamp
Level Meter and Peak Led - after Preamp
High quality conductive plastic pots
Kits are avaivable with (LA7510 and LA2503) or without transformers.
DOA of your own choice ( NOT INCLUDED IN THE KIT)
Its running on +16V/-16V/+48V in the 500 API/ VPR Rack
or in the GDIY 51X Rack
Final Product may vary a little from the pictures (different transformer in the full Kit)
More Pictures and Build Thread
Will be added soon
Here are some listening samples
Soundcloud PI Comparison Test
The PI512 Preamp is a faithful recreation of the classic 512 Preamp design. With a balanced input signal achieved through a 1:10 transformer, this preamp delivers pristine audio quality that captures every nuance of your sound. The preamp uses a single Op Amp for gain, and you can choose your own DOA to customize the sound to your liking (not included in the kit). Thanks to the input transformer, this preamp has a unique character that sets it apart from other preamps on the market.
The Sound of the preamp is definite and has a rough nature in Sound that works definitely in every music production. 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. The Output Attentuator 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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