This is not a Fender product although it does contain some Fender parts. It was built By Terry Dayton of D-LAB Amps. The Chassis Started out as about a 1971 Super Reverb. Terry put in a new circuit with a new eyelet board built to Vibroverb specs. it has an over sized Classic Tone output Transformer(Bassman size), for that thumping solid bass. It has Bias test jacks on back of the chassis. The Cabinet was made by Armadillo Amp Works. One of there best Fender repro cabinet builders. It has a vintage Electrovoice SRO 15" speaker installed. Many say the best speaker ever made. This thing sounds huge. This a total SRV tone machine! Stevie would have loved this amp :).Copy and paste this you tube video title into the search on you tube to see a demonstration of the amp. I bought the amp from Tony in the video:       Vintage Fender VibroVerb Tube amp Super tone boutique Clone by D-lab