Dual balanced Eurorack audio interface

thingiverse

This is a Eurorack format high-fidelity unbalanced-to-balanced audio interface designed around the THAT 1646 balancing driver IC. I've included the front panel, schematic as a PDF, and Gerber file of the PCB. I needed to add a balancing audio output circuit to a DJ high-pass filter I'm working on. I decided to create the testing circuit in Eurorack format so it's easy for me to test in my studio and also publish the circuit as a useful Eurorack synth device for others. The schematic and Gerber file I've included have passed my in-house testing, and I currently have the audio interface installed in my Eurorack setup. I used Easy EDA & JLCPCB for my boards and highly recommend them. I used WIMA capacitors, but the board is set up for regular ceramics. Also, although the electrolytic caps are polarized in the design sheet, use non-polarized electrolytic caps. However, my 3D printer lacks accuracy, so I had to make the holes about 0.5 mil larger than they should be for everything to fit. That said, it should work fine for you as it's not a big difference. Your mileage may vary, but feel free to remix if needed. Cheers from Canada.