While this pic shows Alex adjusting his Advanced Audio Designs Digital delay(s) there's 4 there... (they replaced the Roland Space Echos), the front panel of a silver faced Twin is seen below the Hi-watt head. Also seen in this pic is the Leslie rotating speaker cabinet that is below the delays (and the two, as yet unknown, mystery rack gear) Here's the quote from the June 1980 interview: What is your current onstage amplifier setup? I'm using two Hiwatts; I have one 100-watt head driving two cabinets on my side of the stage, and another 100-watt head driving one cabinet on stage left-Geddy's side. He uses that as a monitor, and you can't even hear it out in the house. I also have a Fender Twin Reverb I use to get a clean, almost direct sound, and then I'm driving my Leslie with another Hiwatt head. In addition I have two Maestro parametric filters-one on my Hiwatt, and the other on the Leslie-and I use an Electro-Harmonix Electric Mistress flanger, a Roland Boss Chorus, an Advanced Audio Designs [3890 Stewart Rd., Eugene, OR 97402] digital delay, a Morley volume pedal, and a Cry Baby wah-wahmore
It is important to note though that he used a couple of different amps, perhaps the most notably the Fender Silverface Twin which can be seen on many different photos. He also played on a couple of different Marshall and Ampeg amps. http://www.groundguitar.com/bob-marley-guitars-and-gear/more
Strummer’s tone could be summed up in one word—clean. After dabbling with a number of heads and combos, everything from a Vox AC30 to a Marshall SLP, Strummer settled on a silverface 1970s Fender Twin Reverb. He used this until the end of 1979, when he switched to a Music Man HD-150 212.more
This is by the amp for killer overdriven tube distortion. But if you use a good pedal, the tube preamps warm it up and you can get a great sound. I use an old ProCo RAt distortion.
I have two of these Amos, one 1974 w/stock JBL speakers and one -975 that I replaced the blown stock Fender speakers with EVM12Ls. I prefer the JBLs, but run together, the warmth of the EVs compliments the JBLs nicely.
They are heavy, but have wheels. I haven't hugged in years, but I can bring myself To sell them, I love them too much.