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Heptode / Virtuoso / 2014 / Effect For Sale

The Virtuoso is a boutique recreation of the original Maestro* PS-1A Phase Shifter, as used in the 1970's by keyboardist John Paul Jones (Led Zeppelin) and guitarists Steve Howe (Yes) and Ernie Isley (Isley Brothers), among many others.

"The sound quality is so good that this could even be a studio device, made by a French company called Heptode"

Footswitches below three colorful LED's select SLOW, MEDIUM or FAST PHASE. The effect ramps up or down when changing from one speed to another and like the original, sounds superb with guitar or keyboards.

The Virtuoso's modern accruements include a footprint that is pedal board friendly, can be powered by either a 9v battery or AC Adapter, is true bypass (relay based) and has a much improved signal-to-noise ratio.


6-stage analog phase shifter

3 phase speeds (Slow, Medium, Fast)

Relay-based true bypass


Power: 9V battery (High quality alkaline battery included) or AC Adapter DC 9V (negative center pin, not included)

Current draw: 45 mA typical

Dimensions: 153 mm (W) x 88 mm (D) x 70 mm (H) / 6.0’’ (W) x 3.5’’ (D) x 2.7’’ (H)

Weight: 500 g / 17 oz


Heptode pedals carry a 2 years limited warranty.

Heptode, France  

Contact name:
Jean-Luc Chtioui
English, French
handmade effects and pedals
Opening hours:

HEPTODE is a french company established in 2010 by Jean-Luc Chtioui.


For further information, please contact Jean-Luc at

  Send message to: Heptode, France
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