The MXR 01A also known as the Model 191, was manufactured by ART (applied Research & Technology) and was a very expensive reverb at the time, selling for more than a Lexicon PCM 60.
Lexicon MPX100 Service Manual + Schematics + Service Bulletins + Repair Procedure in PDF and scanned PDF format.
Full inclusion list:
After purchase you will be presented with 6 links to download all of these documents.
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