Legendary 1980s programmable MIDI tube guitar preamp. Famous for defining late-80s and 90s rock and metal tones, it combines analog dual-tube circuitry with digital control. It was widely used by artists like Metallica, Nuno Bettencourt, and Paul Gilbert.

Vintage 16-bit digital multi-effects rack processor released in the early 1990s, famous for its lush ambient reverbs and use in shoegaze and industrial music. It builds on the standard QuadraVerb by adding an analog preamp section with distortion, overdrive, compression, and basic amp/cabinet simulation.

Vintage 1U rack-mount guitar multi-effects processor and analog preamplifier released by Applied Research & Technology (ART) in early 1992. It combines a solid-state analog preamp with 250 studio-grade digital preset effect combinations

Single-unit, rack-mounted digital multi-effects processor and preamp introduced by ART Pro Audio in the early 1990s. Built primarily for guitarists, it delivers a vast array of programmable 1980s and 90s style analog and digital effects.

Programmable, all-analog guitar preamp introduced around 2004 and co-developed with fusion guitarist Frank Gambale. It features a 12AX7 vacuum tube signal path, extensive MIDI integration, and deep tone-shaping controls designed for both studio and live use.

Vintage late-1980s to early-1990s rackmount guitar multi-effects processor and preamplifier.  Is known for delivering classic, warm, retro digital rack tones.

1U rackmount guitar multi-effects processor and preamp from the early 1990s. It features 24 simultaneous or selectable digital and analog effects, signature artist presets, and programmable routing.