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Tech 21 Boost Chorus

The evolution of the chorus effect seems to have gotten stuck in '80s pop, along with over-processed guitars, cheesy synths and popped collars. This ain't that kind of chorus. When we designed the Boost Chorus pedals we went back to the '70s, when choruses were rich, smooth and manly. We figured out what made these vintage stompboxes sound so good and poured that knowledge into a new kind of chorus pedal with greatly improved performance and a whole slew of never-before-heard sounds. Slapback, echo, flanging and doubling effects are all possible from the modestly named Boost Chorus pedals.

Because of the way traditional chorus pedals typically interact with their amps, most bass players would rather put an angry badger on their pedalboard. The Bass Boost Chorus avoids seasick tones, and badgers, through a specially-tailored design. It features a Detune control to adjust the pitch of the choral voices, adding sonic girth to create thick, lush, bass-perfect chorus. Speed and Depth controls add modulation, so at minimum your fundamental notes are preserved. Finally, a chorus that works in harmony with your bass.


Sample settings include such styles as Cure Bass, Hooky, Squire Harmonized, Bass Chorus-no modulation, Jaco Fretless, Vibrato Bass, Triple Voice Bass, Infinite Flange, Bass Thickener, Subtle, Shimmer for Guitar, Randy Rhodes for Guitar.

®Registered trademarks of their respective companies. Names of sample settings are for descriptive purposes only and should not be construed as an endorsement or affiliation with any companies, products or artists named.

Tech 21 Boost Chorus

Original Bass Boost Chorus (SOLD OUT)

  Tech 21 Boost Chorus
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New metallic finish for 2015, same functionality.


• 100% analog Mix, Tone and Level controls for warm, organic sounds.
• Mix control ranges from 100% dry to 100% wet.
• Speed and Depth work in conjunction to control their respective functions
of the modulation.
• Detune alters the choral voicing up or down, giving you a chorus sound without modulation when Speed and Depth are set at minimum.
• Multi Voice adds dimension and thickens the sound with additional
choral voicings.
• Buffered bypass eliminates the shortcomings associated with "true bypass" (pops and clicks, and high-end loss when multiple pedals are connected together), as well as signal loss associated with other types of switching circuits.
• Custom, silent-switching actuator.
• Heavy duty, all metal construction.
• Operable with 9V alkaline battery (not included) or optional DC power supply (Tech 21 Model #DC2).
©Tech 21 USA, Inc.