Subdecay has been in the phaser game since 2005. With so many phaser pedals out there with simple one or two knob control schemes, we’ve always taken a different approach.
Simplicity has its place, but options are pretty awesome too!
The new Quasar v4 expands on our previous phasers by including internal tremolo and mix circuits. It also employs active volume regulation to avoid the common volume disparities found in many phasers.
There are plenty traditional and experimental tones on tap.
While the Quasar v4 uses digital technology to control the effect, the signal path is 100% analog.


There are a total of eleven modes that fall into four categories.

  1. X-MOD– This is a fancy way of saying the effect is modulated two different ways at the same time.
  2. STEP– Not traditional smooth phaser sweeps. They beep. They Bloop. The phaser steps from one point to another.
  3. ENVELOPE– Phaser modulation is manipulated by touch dynamics.
  4. CLASSIC– All tried and true traditional effects including rotary.
    Functionality of other knobs are dependent on the mode setting. More information on the back cover.
    The control and mode information is intentionally sparse. You really need to try each mode to understand what they do, but this chart will provide help understanding knob functions.


Subdecay offers a 3 year limited warranty from the purchase date to the original purchaser. This warranty does not cover polar bear attacks, willful destroyment, using your pedal as a hammer, or the neglect of the user. It does not cover the finish, paint or any external superficial damage. Any unauthorized repairs or modifications voids the warranty.


Now for the conundrum. Many guitarists have different opinions on phaser placement in the signal chain. Is a phaser a modulation effect? Or is it a filter effect? Technically it is actually both. Typically you’d want a filter effect like a wah early in the signal chain before any gain pedals. Most guitarists will run modulation effects like chorus for flanger later in the signal chain.
There’s no wrong way. Both placements have a different sound when used with overdrive. One thing to keep in mind is the Quasar’s envelop functions will work better with a clean signal rather than after overdrive.


Note: This User Guide is adapted from the official manual created by Subdecay in PDF format, without modification of the content. We just rewrite the PDF, into responsive mobile friendly pages.So, you can read this document anytime and anywhere.

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