Headfirst Double Dirty Shirley

My Headfirst Double Dirty Shirley, which itself is a clone of the Friedman Dirty Shirley. Sounds very similar to the real amp as the preamp circuit is the same (it has some additional features but can be set identically) and the power section is very similar (5881s + JTM45 style Hammond transformers). Might not exactly match the real amp as it doesn't have custom wound Friedman transformers but it gets really close to the real thing, maybe slightly more vintage/JTM45ish sounding. Instead of channel, S1/S2/S3 indicates the structure which can be thought of as the overall voice/gain setting of the amp. Basically S1 is more JTMish and cleaner, S2 is more JCMish and dirtier, and S3 is the most saturated and modded Marshallish. Technically the preamp is a modified/fattened up JCM2204 style preamp, but those structure descriptions are kind of analogous to how it works in practice.