StewMac Lightcycle Phasor II Pre-Built DIY Optical Phaser

Recently, we’ve been taking a look at the new lineup of pre-made pedal kit effects from our friends at StewMac, which included the Sun Fuzz, Ghost Drive Transparent Overdrive, Two Kings Dual Boost Overdrive and the Lightcycle Phasor II Optical Phaser. Checking out each of these pedals individually, we’ve worked our way through the first three units, finishing this run with the Lightcycle Phasor II Optical Phaser. Bringing vintage tone into the modern era, this three knob gem brings the sonic goods, without the maintenance or high secondary market prices…

In the 1970s, the Mu-Tron Phasor II rewrote what a phaser could be. Not just a simple one-knob swirl, but a studio-quality optical circuit that gave players precise control over lush, dynamic textures right at their feet. Suddenly, you could recreate the feel of double-tracking, synth sweeps, rotary speakers, even spacey soundscapes — live, on stage. The sound was liquid, inspiring, and unforgettable.

But originals are rare and expensive, often fetching $500 or more on Reverb today. And even if you found one, decades of wear make them temperamental and unreliable. That’s why StewMac built the Lightcycle Phasor II — to capture that lush modulation and make it reliable, accessible, and ready for modern pedalboards.

Internal Trim Pots

TR1 (Right Side): Adjusts the cycle of the LFO LED from dark to light. Set to taste.
TR2 (Left Side): Adjusts the peak brightness of the LFO LED. Set to taste.
Front Panel Controls

Depth: Adjusts the intensity of the phasing effect.
Rate: Controls the speed of the LFO (Low Frequency Oscillator).
Feedback: Adjusts the amount of phased signal fed back into the circuit. Turning clockwise sends more of the output signal to the start of the phasing stages.
Specifications

Compatible with 9VDC, standard 2.1mm negative center input (no battery option). Warning: Do not exceed 9VDC.
Enclosure Size: 121.5mm x 66mm x 40mm, powder-coated finish with printed logo
Bypass: True Bypass
Current Draw: 61.3mA
Input Impedance: 1MΩ
Output Impedance: 560Ω
Max Input Level: -10 dBm
Noise Floor: -68 dBm

The Lightcycle Phasor II Optical Phaser brings swirling, psychedelic sonic textures to the forefront, combining vintage tone with modern reliability, and now, no soldering required!! Just plug in, stomp, and step back in time to a modulated world filled with awe and wonder. Thanks so much to Ally and all at StewMac for letting us help brings this new line of pedals into the world – be sure to visit their website for ordering, more info, and to check out the entire new lineup of pre-built boutique effects pedals – cheers!!