The ProphecySound Infinitphase MKII is a phaser and sequenced filter effects pedal from Prophecysound Systems, sold in the United States through Analog Man Guitar effects. The maker describes it as going "far beyond any existing phaser or sequenced device": its audio section is based on a Mutron Biphase channel, extended to a maximum of 8 phase stages, with an all-analog, high-headroom signal path1. It belongs among phaser pedals but also reaches into filter pedal territory with its step-phased tones.
The MKII is AC powered with an internally regulated bipolar +/-15V power supply, so it will not run from a battery or a standard pedalboard supply. The maker's page also dates from a period when units were made in limited numbers: "Email for availability, may have a few more for 2005."
LFO, resonance and speed control
The MKII's modulation section is unusually deep for a phaser. The LFO rate is variable from .1Hz to 10Hz, a range the maker calls extended, and the pedal can produce triangle, sawtooth, square, pulse or blended LFO shapes, step-phased tones, or a blend of both1. The step-phase control section uses slew-rate limiting, which the maker says produces "classic sample-and-hold effects or meandering phase tones"1.
Resonance is handled by a single control that adjusts both positive and negative resonance1. Two optional switches were offered for $20 each:
- 4/8 STAGE switch: in the 4 phase position the maker says it can sound similar to a Uni-Vibe or MXR Phase 45
- LFO RATE switch: lets the LFO "go super fast for weird ring-modulation type sounds"1
For foot control, the MKII has a Speed pedal jack that can take a volume or expression pedal, so speed can be worked by foot while playing1. Players looking at that setup may also want to see expression pedals.
Construction and MKII improvements
The pedal is built into a custom-made, 1mm folded steel, powder-coated box, with Neutrik connectors chosen, in the maker's words, "for ruggedness and reliability"1. The footswitch is a heavy-duty 3PDT stomp switch enabling true-bypass with an LED indicator1.
The maker lists the MKII's improvements over the MKI as:
- Double-sided PCB layout with separate analog and CV grounds
- Lower noise
- A "true" blend control
- A better box design, more protective of the pots1
Availability and price
The Infinitphase MKII was hand assembled in Australia using quality components and professionally manufactured PCBs1. On the Analog Man page it was listed at $340 plus $15 shipping and handling in the USA, with the SPEED expression jack and a USA AC Adaptor included; the optional switches were $20 each, ordered by email1. The page notes limited availability, telling buyers to email and saying there "may have a few more for 2005"1.
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Questions
Does the ProphecySound Infinitphase MKII take a battery?
No. The Infinitphase MKII runs from a 16V AC power adaptor and is described as AC powered, with an internally regulated bipolar plus and minus 15V supply inside the unit. There is no battery option mentioned, and because it needs AC rather than the usual 9V DC, it will not run from a standard pedalboard power supply tap.
Is the Infinitphase MKII true bypass?
Yes. The pedal uses a heavy-duty 3PDT stomp switch, which the maker says enables true-bypass operation with an LED indicator. That means the effect is taken completely out of the signal path when switched off.
Where is the Infinitphase MKII made?
The Infinitphase MKII is hand assembled in Australia using quality components and professionally manufactured PCBs, according to the maker's product page. It was sold in the United States through Analog Man Guitar effects.
Can I use an expression pedal with the Infinitphase MKII?
Yes. The MKII includes a Speed pedal jack, and the maker says it can be used with either a volume pedal or an expression pedal to control speed with your foot. The version sold with the SPEED expression jack and a USA AC adaptor was priced at $340 plus $15 shipping and handling in the USA.
How many phase stages does the Infinitphase MKII have?
Up to 8 phase stages. The audio section is based on a Mutron Biphase channel extended to a maximum of 8 phase stages. Units with the optional 4/8 STAGE switch can run at 4 stages, which the maker says can sound similar to a Uni-Vibe or an MXR Phase 45.
Sources (1)
- ProphecySound Infinitphase-II sold by Analog Man Guitar effects, Analog Man Guitar effects (analogman.com), 2015
