The Retro-Sonic 4-Stage Analog Phaser is a phaser pedal made by Retro-Sonic, a compact analog unit with three controls: Speed, Depth and Level1. It sits in the phaser family of effects, which sweep a moving notch through your signal for that swirling, jet-plane texture; see the site's wider guide to Phaser Pedals for how they compare with neighbors like Flanger Pedals and Chorus Pedals.
Controls and switching
The pedal keeps things to the classic three-knob layout1:
| Control | What it does |
|---|---|
| Speed | Sets how fast the phaser sweep cycles |
| Depth | Sets how pronounced the sweep is |
| Level | Sets the effect's output volume |
A single footswitch labeled Normal/Effect takes the pedal in and out of the effect1. The input and output are both ¼-inch standard phone jacks, so it connects like any ordinary pedal1.
Power
Retro-Sonic specifies a 9v battery or a 9v negative pin adapter1. The negative-pin adapter is the center-negative standard most pedalboard power supplies use, so it should slot into an existing board setup, and the battery option covers players who run without one.
Size and price
At 4.4 x 2.3 x 1.1 inches, the pedal has a small footprint that leaves room on a board1. Retro-Sonic lists it at US$199.001.
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Questions
Does the Retro-Sonic 4-Stage Analog Phaser take a battery?
Yes. Retro-Sonic lists the power supply as a 9v battery or a 9v negative pin adapter, so the pedal can run on either. A battery makes it easy to drop onto a board without a dedicated power supply, while the adapter suits players who already run a pedalboard power source.
What size is the Retro-Sonic 4-Stage Analog Phaser?
Retro-Sonic gives the dimensions as 4.4 x 2.3 x 1.1 inches. That is a compact footprint by pedal standards, so it fits on a crowded board and takes up little room in a gig bag.
What does the Level control do on this phaser?
Level is one of three controls on the pedal, alongside Speed and Depth. It sets the output volume of the effect, letting you match the phaser's level to your clean tone or push it louder when the effect is on.
Can it run on a 9V power supply?
Yes. Retro-Sonic specifies a 9v battery or a 9v negative pin adapter, which is the center-negative standard used by most pedalboard power supplies and one-spot style adapters.
How much does the Retro-Sonic phaser cost?
Retro-Sonic lists the 4-Stage Analog Phaser at US$199.00 on its product page as of October 2026.
Sources (1)
- Phaser | retro-sonic, retro-sonic.com