It’s the only one we can find with the red silk screen on the faceplate and early, era correct serial number. This EM-1 Groupmaster appears to be a part of the early production run that resulted in the rare red face EP-3. Please contact me here to sell a vintage Echoplex tape machine:
I'm always looking to buy clean vintage Echoplex tape echoes but Groupmasters are my favorite. While production figures are unknown, the EM-1 Groupmaster is rarely offered for sale. The Groupmaster was the top of the line offering from Market Electronics during Battle’s tenure. The mixer allows the operator simultaneous echo signals with different signal gain and tone adjustments to take full advantage of the EP-3s preamp and echo tone. This rare tape echo combines the desirable EP-3 solid state preamp with the added functionality of a four input mixer and attractive large UV meter.
The Echoplex EM-1 Groupmaster is a Mike Battle designed four channel mixer version of the storied EP-3 introduced ca.
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