Shift Line is a boutique effects manufacturer founded in 2008 and based in Saint Petersburg, Russia. Started by a team of electronics engineers and musicians, the company builds compact, handmade pedals aimed at guitarists and bassists who want studio-grade tone from stompbox-sized enclosures. Their catalog spans preamps, cabinet simulators, fuzz and drive circuits, and modulation/ambient effects.

The brand is best known for the A+ CabZone, an IR-based cabinet simulator that helped popularize cab-sim pedals for silent stage and direct-recording use. Other notable releases include the Termofuzz distortion/fuzz, the Buzz bass drive, the Prism stereo filter and effects unit, and the OKTABEP octave pedal. Beyond hardware, Shift Line also develops software, including the Astronaut Reverb plugin and impulse response packs modeled on vintage amps and cabinets.

Shift Line has built a reputation in the pedal community for pairing utilitarian industrial design with flexible, amp-centric tones, and its products are distributed internationally through specialty retailers and platforms like Reverb.

Shift Line has 23 products cataloged on Equipboard, including Reverb Effects Pedals, Overdrive Effects Pedals, and Bass Preamps. Their gear is featured by 5 artists, with the strongest followings in Rock, Electronic, and Jazz. Notable users include Takeshi Ohtani, Merzbow, and Lennart Bossu.