Vintage 1966 Fender Pro Reverb 40 Watt Guitar Combo AmpNotes This listing is being sold as is occasional feedback high pitched ringing linked to reverb tank. Many cosmetic flaws. See photos! A Vintage 1966 Fender Pro Reverb 40 Watt Guitar Combo Amp in Poor condition! At Evolution Music, we attempt to highlight cosmetic defects (if any) by picturing every angle of every piece of gear so you know exactly what you are getting. We always picture any and all accessories too. What you see is what you will get