Professionally serviced and 100% functional. Visible cosmetic wear from normal use.

Electro-Harmonix Bad Stone Phaser V1.
The Bad Stone was released 1975 and produced until 1981. It was designed by Bob Bednarz and it was the first phase shifter to employ feedback in the circuitry. It compasses 6 stages of phases shifting with feedback.
This is the original Mummy Face version, from the same era as the Ram's Head Big Muff.

Rate: controls the speed/rate of the LFO wave that controls the effect
Blend: controls the mix of dry/wet signal
Color: The effected signal feeds back on itself for a stronger effect

Caveat emptor from the For Musicians Only blog:
"...All I can say is there's a good reason they don't make this one anymore. The Bad Stone is an early FET-based phaser, so the fidelity will be somewhat limited to begin with. Then again, the original MXR Phase 90 and the Maestro PS-1 Phase Shifter both used FETs, and we love those pedals. Anyway, we did spend some time calibrating the unit, but it became apparent that it wasn't going to get much better than what we had. The bottom line is this is a collector’s piece. You don't get it because it's a great phaser (it's not!), you get it for the Mummy Face. It's all about the Mummy..."

Ships worldwide. Estimated cost of international shipping is based on shipping to Australia, the furthest distance from my location. Please inquire for an estimate to your specific location outside of the USA.