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This is one of three Aion PCBs that I built a few months back. Great PCBs and the instructions are spotless and very useful. This is a great sounding smooth distortion circuit, but I did some mods…
Modifications or part substitutions
Too much gain for me, so I simply swapped the 1M gain pot for a 500k like in the original tube screamer. I also found it slightlt dark, so I swapped R19 for a 7k and R20 for a 13k. Now it sounds more like a tube screamer with the tone @ 2 o’clock but with the added benefit of the baxandall tone stack!
This build houses two Xotic BB Preamp clones in the same enclosure with one foot switch that bypasses the entire pedal and another foot switch which toggles between the sides. I use it to set one side for a slight breakup and the other side set for a more aggressive tone. Switching between sides doesn’t drastically change your tone.
This was my first build using an Aion PCB. I was impressed by the quality of the PCB, the quality of the build doc and by the accuracy of the circuit. I have a real BB Preamp and the Perelandra sounds exactly like it. I am very happy with the build.