This is a First Watt F5 clone built by amp builder Tim Rawson. The chassis is all DIY though substantial. Amp sounds great, dead quiet. It is a clone of a very nice circuit. By all means go for the real thing if you can. I've owned this amplifier for about a year and have enjoyed it. Probably tough to beat at $400 even if it doesn't match the First Watt. I own lots of real First Watt but not the F5. This is a nicely executed clone.
I'm equipment rolling right now and this has to go.