Kurt Prange is the designer of the MOD 101 Amplifier kit. Kurt explained to me that the amp has a 60 watt class AB power section with a modified blackface preamp section. It has a punchy open sound and with the well thought out build instructions you can build an amp with 32 different variations. Click here to read the NY Amp Show article and learn more about the MOD 101 amp and some other cool gear.