CustomTone to release Ethos 60's Harmonic Bias Trem pedal
November 5, 2025 · 2 sources
CustomTone LLC, based in Vermont, is set to release the Ethos 60's Harmonic Bias Trem, a tremolo pedal that the company says channels the modulation of 1960s Brownface and Blackface Fender amps1. Delicious Audio reported the upcoming release on November 5, 20251.
The pedal has two footswitchable modes: amplitude-based (standard) tremolo and harmonic tremolo, described as phase-shifted and vintage-style, each with independent speed settings1. An intensity knob adjusts modulation depth across both modes, and tap tempo provides rhythmic control1. A tone mini-knob and a control labeled "VTrim" are also listed; the report says the VTrim likely fine-tunes high-end response and bias voltage, but does not confirm its function1.
Full specifications remain under wraps, and the report gives no release date1. A separate listing by Guitar Pedal X puts the pedal at "From $249"2. CustomTone's earlier Ethos pedals are amp-in-a-box designs known for Dumble-style overdrive and clean tones, some of which sell for close to $1000 in the used market, according to the report1.
"Two Footswitchable Modes, Toggle between amplitude-based (standard) and harmonic tremolo (phase-shifted, vintage-style) effects, each with independent speed settings."