Xotic SL Drive
Schematic is avaiable HERE. 10uF cap is stock SL Drive value, 1uF is suggested value by Aion Fx.
Xotic
Xotic BB Pre Amp
Two layouts for this one. One stock and one with an additional Mid control. The clipping diodes is placed on the side of the board so you can easily add a diode clipper switch. Just omit the diodes on the board and add wires tat pad 1M and 1N to a DPDT switch where you … Read more
Xotic Soul Driven / Aion Thulcandra
With “Bass mod” by Aion Electronics. Original has internal DIP switches to select different bass frequencies but is here moved to the outside and converted to a pot.
EWS Tri-Logic Bass Preamp II
Here’s a pretty simple but effective bass preamp from EWS. It’s a 3-band EQ being pushed by a MOSFET gain stage. Looks like EWS made a version for Xotic with the same name. Not a lot different between the two other than some value changes laid out in this schematic on FSB. I’ve laid it … Read more
Xotic BB Preamp
Got a request for the BB Preamp, but not the current version. The earlier version uses a dual-gang pot for the Level control and apparently more bass response. Like many of Xotic’s offerings the BB owes a lot to the classic Tube Screamer. Schematic can be found here. If you’d prefer to build the newer … Read more
Xotic EP Booster
Here’s another circuit from Xotic. Simple JFET boost with an output buffer borrowed from the Tube Screamer. Originals have 2SP1815 transistors with BCE pinout, but I’ve laid this out for the more common 2N5088 with CBE pinout. The originals also have the Bright and Fat switches internally as DIP switches. Having these externally should be … Read more
Xotic AC & RC Booster
Got a request for the RC. The AC is just a few value changes, so I drew them up to be built on the same board. Seems like a Tube Screamer with a 2-band EQ section to me.