Doppler

Note: I am currently working on a full platform redesign for 2025 with a specific focus on Vostok, Evergreen, and Rune. This updated design will standardize my lineup to 125B enclosures, topmount jacks, relay bypass (soft touch) switching, and allow for a much more streamlined build process which will allow for more consistent pedal availability. 903 Effects is a passion project that lives alongside my day-job and family life, all pedals will continue to be built here in East Texas by me alone and this update will allow me to continue making killer gear on top of everything else that goes on in life. Thanks for reading and keep having fun making music! Check my Instagram for progress updates.

Doppler: This unique design seamlessly combines a spooky hall style reverb with a rich, vintage vibrato. Utilizing the renowned Belton Brick, the reverb side of Doppler delivers a vast, ethereal soundscape that can range from subtle shimmer to haunting cathedral echoes. Paired with this is a warm optical vibrato circuit reminiscent of the golden age amps of surf guitar.

Verb: This increases the reverb level. CCW is off. CW is full blend.

Depth: Increases the depth of the vibrato. CCW is off. Noon is a warm smooth vibe. CW is a choppy vintage voiced vibe.

Rate: Controls the rate of the vibrato.

With these simple controls for reverb, vibrato depth, and rate, the Doppler offers endless possibilities for tonal exploration. Whether you're chasing shimmery dream pop textures, jamming out to surf rock, or adding a touch of magic to your leads, Doppler can take you there.