Fulltone Custom Shop – That 80’s Rack Chorus (TERC)

Legendary Tri-Stereo Rack Chorus

Brand: Fulltone

Model: Custom Shop That 80’s Rack Chorus (TERC)

This is an exact reproduction of the legendary Tri Stereo Chorus (TSC) rack units originally sold in the 1980s under the Dyno My Piano, Songbird, and Dytronics names.

Not inspired by.

Not modeled.

Not “close.”

This is the wide, glassy, three-dimensional stereo chorus that defined high-end studio racks in the 80s — a sound modern pedals still chase and rarely nail.

The Sound

• Massive stereo width with no seasick pitch wobble

• Clear, solid center image

• Lush modulation that stays musical and controlled

• Instantly recognizable on guitar, synths, Rhodes, pads, and stereo buses


Engage it and everything just sounds finished.

Used by the Pros

The original TSC units were a studio staple, used by players who shaped modern guitar tone:

• Michael Landau

• Steve Lukather

• Dann Huff

• Eric Johnson

This was the chorus before plugins, presets, and compromises.

Why the Fulltone TERC Matters

• True Tri-Stereo modulation — not fake width, not dual-mono tricks

• Faithful to the original rack units that are now extremely rare

• The classic 80’s studio sound with modern reliability

• Wide, deep, polished — without hollowing out the mix

Most choruses imitate the idea.

This delivers the actual result.