RC - Booster is pretty much a clean boost with EQ capability. I could get great Keith Richards sounds out of my AC. I like it a lot The Malacandra Boost / Overdrive is a recreation of the Xotic AC Booster and RC Booster, two nearly identical pedals that feature a two-band EQ for independent control of bass & treble frequencies. The schematics were indeed different from the community’s prior traces. In my opinion, the RC has less gain/overdrive than the timmy. RC = Really Clean boost I don't know what the real logic is behind the naming system of these Xotic pedals. The AC Booster and Bass RC Booster were purchased new in 2019, while the standard RC Booster was used but only a couple of years old. The AC Booster is a tasteful overdrive that preserves the dynamics of your playing and your guitar’s inherent character. AC = Almost Clean boost AC = cranked AC30 tone Dumble inspired is a new one, I don't think it sounds very Dumble but I can only compare it to recordings since I have never plugged into a Dumble myself. The adjustable +-15dB two band active EQ allows players to dial in their sound with pinpoint accuracy and adds a HUGE range of harmonic content to the player’s overall sound. Email This BlogThis! The AC is really nice for a smooth, medium gain overdrive sound, and it really doesn't sound like anything else I have. The RC Booster is one of the most transparent pedals I have ever plugged into. It has a gain control so that you can add a little "hair" to your signal and warm up the tone. It can go from clean boost to moderate over drive. In fact, the AC and RC sound VERY different. The simple, yet highly effective EQ controls ensure you’ll find the perfect sound to fit in the mix or cut through when you need to. Kusi of the freestompboxes.org forum contributed these mods to change the xotic AC booster into the xotic RC Booster: C1 = 47nF C2 = 1uF / NP R8 = remove and bridge C4 = remove R5 = 22k R7 = 250k Clipping-Diodes = 3x 1N4148 each side Posted by Unknown at 01:23. The Xotic RC Booster surprised me like few other pedals ever have before. The timmy is an overdrive and the RC is a booster. I used to use the RC as a mild breakup od, but it was eclipsed by a Himmelstrutz Fitzo. The result is a flexible tone machine that lets you go from a clean volume boost to a thick overdrive. I would characterize it as a low to medium gain overdrive, more on the low side. AC - Booster is like a TS-9 Tubescreamer without the lost in the bass register and overly strident the mids. We traced three pedals that share the same PCB in Xotic’s production line: the AC Booster, RC Booster and Bass RC Booster. The RC Booster V2, inspired by the Scott Henderson RCB-SH model, now comes with an added gain channel for even fatter tones with a super transparent 20dB+ clean boost. The AC has a vintage feel to it's voicing, very good for roots rock and americana. The wide-range EQ controls are superbly voiced to allow perfect tailoring of your sound without coloring your tone whatsoever.