Mu-tron Bi-phase + Custom Controller (Opti-pot)

Excellent condition. Full working order. Complete with our own custom foot switch which replicates the C-100 Opti-pot functionality.

The hours and love put into this are not visible from a simple photo: new socketed ribbon cables (future reliability/ease of servicing); IEC power socket. Like many older pieces, they now require a great deal of work to remain reliable for the next decade or two.

Supplied with our custom double switch. This has an expression pedal socket so you can access the phaser sweep capability that normally requires the rare C-100 Opti-pot (knob on the side allows you to adjust the sweep range).

For UK/European buyers we will replace the internal transformer so it runs on 220/240v supplies.

We have to go deep on these to do our best to keep them running including fitting new socketed ribbon cables (future reliability/ease of servicing). Recapped and with an IEC power socket added. Like many older pieces, they now require a great deal of work to remain reliable for the next decade or two.

We love a Bi-Phase (it’s in our top three phasers for sure) and we’re not alone: not only are they a staple effect of many dub reggae producers (Lee Perry most notably), but they’re widely-used with guitars/synths/keys etc in a wide variety of genres. A truly legendary effect, essentially it is two of Mike Beigel’s optical phaser circuits (aka the Phasor II) in one housing, with ability to route the output of one through the other, and link, or not, the sweep rates. Note that you can also use each phaser separately.

Condition: In excellent cosmetic condition with some minor scuffs and dings. Please see photos or get in touch if you require more information on condition.

Voltage: Will be set up for either 120 or 240v operation before shipping.

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Reverb customers please note:

We are based in the UK and have many years’ experience sourcing, servicing and shipping delicate vintage gear worldwide. You can rely on us to pack your item with care, and deliver swiftly by international courier with full tracking and insurance.

We offer a professional satisfaction-guaranteed service: customer care and attention to detail are paramount. Please message us if you have any questions or feedback. Tony