Founded in 2006 by Tim Larwill, an Ottawa-based engineer, Retro-Sonic is a Canadian boutique pedal company specializing in handmade recreations of classic guitar effects updated with modern components and features. Larwill's path into pedal building grew out of a passion for vintage cars and garage rock, which led him to recreate the sounds of iconic stompboxes from the 1970s and '80s. His first design was the Chorus Ensemble, a faithful reproduction of the 1976 Boss CE-1 using original analog bucket brigade device (BBD) chips.

Retro-Sonic's lineup includes recreations of several legendary circuits: the Flanger (based on the Electro-Harmonix 18V Electric Mistress), the Analog Delay (based on the Boss DM-2 with up to 800ms of delay time), the Eight-0-Eight Overdrive (based on the Ibanez TS-808 Tube Screamer), the Compressor (inspired by the Ross Compressor), and a Distortion pedal built around the classic LM308 chip. Each pedal is individually hand-built and tested in Ottawa. The Flanger earned a Premier Guitar Premier Gear Award, with reviewers praising its open, spacious modulation and its improved design over the original Electric Mistress — notably the addition of a level control that addresses the notorious volume drop of vintage units.

Retro-Sonic has 8 products cataloged on Equipboard, including Phaser Effects Pedals, Chorus Effects Pedals, and Compressor Effects Pedals. Their gear is featured by 14 artists, with the strongest followings in Rock, Pop, and Metal. Notable users include John Dyer Baizley, Dave Keuning, and Steve von Till.