The Ares Preamp is a reproduction of the EP-3 unit in bypass mode. It uses a charge pump to get 18 or 24v from a 9 or 12 volt source. There is also an output buffer on the end (adapted from the ClinchFX EP-Pre) that preserves the tone but gives it a much lower output impedance than the original.
The dimensions of this pcb are 49,5mm x 49,5mm. It is also available as ready to solder kit:
This project is by Aion Electronics. Since the modifications featured in this project require some basic knowledge, this project is rather for more experienced builders.
Here is the direct link to the manual with layout and schematic:
Here you can find build reports on this project: Build Reports