My amp tech is Dave Robinson, in Georgetown, Ontario. He's done 63 of the Filmosound conversions so far and his approach as really evolved. This one is a model 285, and has a 6J7 preamp tube. That tube is magic. This is my second one of these and they are both my favorite amps of any that I've owned. The cabinet was designed and built by Derrick Bell at Veteran Guitar Cabinets in Trenton, Ontario. Single 12" speaker, and this one received a master volume after the preamp section.