Vintage 1974 Maestro PS-1A Phase Shifter, the Tom Oberheim-designed phaser behind countless classic '70s recordings. Three pushbutton speed settings and deep, rich analog phasing that still sounds like nothing else.

DATING All three Signetics MC1458 op-amps carry date code 7408 (week 8, 1974), placing this unit in 1974 production.

SERVICE - Fully recalibrated: FET bias and oscillator amplitude adjusted to spec, restoring proper sweep depth and smoothness. - No parts replaced. Circuit is original and unmodified. - Tested and working on all speed settings.

CONDITION - Lots of dings, scratches, and some rust spots. The rocked switches have some odd "spoting" on the side. None of it affects functionality.

Ships well packed.

Feel free to message with questions.