An electrial circuit engineer, took a pair of the Roland/Edirols apart in our conference area and noted that they are NOT completly digital as monitors...I didn't ask what parts were or were not, but as Phil suggests, buy something pro, for that purpose.
R
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Label on the reverb, inside 1973 Ampeg G-212: "Folded Line Reverberation Unit" Manufactured by beautiful girls in Milton WIS. under controlled atmosphere conditions.
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