My good friend, Paul Braddock, always raves about these beasties. Mike Campbell, the Rolling Stones, The Faces are all notable users of Ampeg! I heard 'Good Rockin At Midnight' which I believe was recorded in one take by Jeff Beck with a Reverberocket. I picked one up through a friend of mine, Roland Lumby from the 'Amp Clinic' who restored it. Fantastic...
In the early 60's, Ampeg was the first company to incorporate reverb in an amplifier. The Reverbrocket preceded Fender's Vibroverb (often thought of as the original) by nearly two years.
Ampeg's founder, Everette Hull, hated distortion and guided the designers to create very robust, loud clean amps. Of course Ampeg is known for its bass amps, notably the mighty SVT, but the guitar amps are exceptionally loud, clean and sound wonderful.
My favorite is the V4 / VT22 (combo), which I am still looking for!
Has three inputs; guitar, harp, and accordion - presumably with different sensitivities. Controls consist of volume, tone, reverb, a single rotary 'Dimension' (lovely term), with more standard tremolo 'Speed' and 'Intensity' rotary knobs.
The power amp has 2 x 6V6GT with an output of 15 watts RMS @ 8 ohms. The preamp section has the unusual selection of 2 x 6SL7, 2 x 6SN7 and a 5Y3GT rectifier.
My favourite setting is with the tone backed quite a way off, giving a rich, dark sound. Fabulous, with beautiful spring reverb - which doesn't sound like it comes from a small tank - and tremolo to die for.
I will be posting some video here soon, but in the meanwhile and for your delectation, here is Jeff Beck doing his stuff on 'The Honeydrippers' (featuring Robert Plant) 'Good Rockin' At Midnight'.
The album is ace too, worth a purchase, not a free download :)