This is the classic Maestro Echoplex EP-3 Tape Delay Machine from the 1970’s sought after for its warm tape delay and the outstanding sound of its internal preamp. This one was examined thoroughly by premier Echoplex repairmanWilliam Yates - head alignment, and replacement of fasteners and cup washers were done.
"The Maestro Echoplex EP-3 debuted in 1970 as the next update in the Echoplex line. The early versions were made laminate pine cabinet, black top tape transport base and the legendary preamp circuit that has been copied by so many pedal manufacturers. Later EP-3s and EP-4s used a thicker, particle board cabinet and a compressor circuit board that's said to muffle the Echoplex's sweet preamp tone. The early black top EP-3s were widely adopted by many players as a part of their standard rig like Jimmy Page, Eddie Van Halen, Eric Johnson, and more."