[SN -----] USED MAESTRO / 1969 Echoplex EP-2 [04]

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1969 Maestro Echoplex EP-2 Founded in the United States in 1935, Maestro became a subsidiary of Chicago Musical Instruments (hereinafter: CMI) in the early 1950s and released a vacuum tube amplifier for accordions in 1955. CMI was also the parent company of Gibson, and the two brands went on to develop a close relationship. From the 1950s through the early 1960s, the company primarily manufactured guitar amplifiers, releasing models such as the Gibson GA series under the Maestro brand as well. In 1959, CMI began producing the EchoPlex, developed by Market Electronics, and chose Maestro as the brand for its sales.Maestro released the tube-driven [EP-1] and [EP-2] EchoPlex models in the 1960s, followed by their transistor-based successors, the [EP-3] and [EP-4], in the 1970s. It was this EchoPlex that played a pivotal role in elevating the Maestro brand. This unit is a later-model, 1969 “EP-2”—an improved version of the “EP-1”—that is vacuum tube-driven. Controls include PLAY BACK, a footswitch jack for ECHO ON/OFF, ECHO REPEATS, RECRD LEVEL, VOLUME, ECHO, a SOUND ON SOUND switch, an INPUT jack, and SPEED OF ECHO DELAY. The transformer date is “AM-3866,” and the pot dates are “137 6947 (VOL),” “137 6844 (ECHO),” and “137 694 (REC LEV.),” indicating that CTS pots manufactured in 1968–69 were used. The vacuum tubes used are “6EU7” for the ECHO PLAYBACK AMPLIFIER and REC AND INSTRUMENTS AMPLIFIER, and “6C4” for the OSCILLATOR. At our repair center, we have installed missing inductors and coils, replaced one power supply electrolytic capacitor, replaced 14 other defective capacitors and resistors, replaced the indicator lamp, cleaned the control pots, removed the ground capacitor, conducted a PSE dielectric strength test, and performed a thorough cleaning and inspection. The unit is now fully functional and ready for use. This model is famous for being used by artists such as Jimmy Page and Van Halen. As the saying goes, “it gets fatter just by running the signal