The Stone Phaser is a phaser stompbox from HeadRush, and the maker describes it as based on the EHX Small Stone, the compact phaser long associated with Electro-Harmonix1. A phaser sweeps a series of notches through your signal, producing the swirling, jet-like movement heard on countless rock and funk records; if you are new to the effect, the site's Phaser Pedals page explains how the type works and how it differs from a flanger or chorus.
HeadRush also offers the same effect outside the stompbox line: on its Pedalboard units, the STONE PHASER effects model is likewise described as based on the EHX Small Stone2. That means a player with a HeadRush Pedalboard has the same circuit character available as a built-in model, while a player building a board of individual pedals can get it as a dedicated stompbox.
What it does
As a phaser, the Stone Phaser modulates your signal to create moving peaks and notches in the frequency response, the sweeping effect that defines the type. HeadRush bases its circuit on the EHX Small Stone. Players comparing options in the lane can also look at the HeadRush Square Phase, another phaser from the same maker with its own character1.
For placement on a board, phasers are commonly run alongside drives and filters: players often pair them with Overdrive Pedals, Fuzz Pedals or Wah-Wah Pedals, and the swept effect also sits well before time-based effects such as Delay Pedals.
Questions
What is the HeadRush Stone Phaser based on?
HeadRush describes the Stone Phaser as based on the EHX Small Stone, the compact phaser originally made by Electro-Harmonix. The same circuit modeling also appears on HeadRush's Pedalboard units as a STONE PHASER effects model, so players can get the same character either as a dedicated stompbox or within a multi-effects setup.
Sources (2)
- HeadRush Stone Phaser product page, HeadRush (revalver.headrushfx.com), 2026
- Amp Modeling Guitar Effects Processor, HeadRush FX (www.headrushfx.com), 2026
