Maxon SD-9 Sonic Distortion brush eight MOD Ver.4.5. There are videos on YouTube by YouTubers, so please refer to them. It has a slightly clearer and cleaner sound than the standard SD-9. Because of its clear contours, it's very easy to handle from crunch to overdrive, and when you roll back the volume, it produces a warm sound like a tube amp. The improvements make the volume tracking exceptionally high, making it easy to shape the sound with your hands. Also, the tone control is softer, so it maintains good sound quality even when turned up more than the original. You can set it to overdrive and control the sound from clean to crunch, or you can increase the drive for a fine-grained fuzz-like distortion sound; both are usable. It works especially well with single-coil pickups. Please consider it. - Brand: Maxon - Model Name: SD-9 - Type: Distortion - Controls: DIST, TONE, LEVEL - Power: DC INPUT 9V