| The RPM-1 has been out of production since 2005, I think. Never had an EVO III. There were the original pre-EVO blue ones, the silver-faced Entwistle signature and "Klystron" models, and the EVO II. The EVO II was the most commonly produced.
Great preamp if you can find one, and I'm pretty sure the electronics are the same inside each different version anyway. It's just a tiny amount of preamp circuitry and a crossover.
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Originally Posted by smoothdave  My goal in life is to be signatured on talkbass.com. | | 
