HeadRush (ReValver) White Boost

White Boost is a boost stompbox from HeadRush, offered under the company's ReValver line of stompboxes. Its effect type is boost, and the maker states that the circuit is "Based on a Xotic® RC Booster," a well-known boost/overdrive design¹. For a player, that places it in the boost pedals category: a pedal used to push a signal louder, add harmonic content, or drive an amp's input harder without changing the core tone the way a distortion or fuzz pedal does.

What it does

A boost pedal takes the guitar's signal and raises its level. Depending on where it sits in a signal chain, that extra level can do different jobs: as an always-on pedal it can add presence and harmonic content, or, placed last in the chain, it can push an amplifier's dirty channel harder. The RC Booster circuit the White Boost is based on is a familiar reference point in this territory, which is why HeadRush names it directly on the product page¹.

How it compares

Boost pedals come in several circuit approaches, and the White Boost's RC Booster basis sits among them. For context, here is how some other boost pedals described by their makers and by the press line up:

The White Spiral Boost is a useful point of comparison because it takes a similar always-on role. Premier Guitar's press release described it as a "Low-Gain Boost Harmonic Stimulator," and Guitar World noted its Girth knob, which "alternately restricts or increases bass level," along with an Alpha/Omega toggle switch that lets the user swap the positions of the Girth and Grit effects²⁴. Guitar.com's report on the same pedal described it as a JFET-based unit that can serve as both an always-on booster and an end-of-chain boost, noting that "using it as an end-boost can help enliven an amp's dirty channel"⁵.

The Pigtronix Class A Boost Micro (white) represents the clean-boost end of the field: its maker's listing on RockBoard's PedalPedia describes it as a booster that "can deliver up to 20db of clean boost"³. A clean boost aims to raise level without adding grit of its own, while a design like the White Spiral Boost deliberately adds a little grit. Where the White Boost falls on that spectrum follows from its RC Booster basis, which HeadRush names as the foundation of the circuit¹.