Chunk Systems is a Sydney, Australia-based builder of boutique effect pedals designed specifically for bass players. Operating as Chunk Systems Pty Ltd, the company became known for hand-assembling its pedals in Australia using close-tolerance analog components, and for pushing stompbox design into territory typically associated with synthesizers.

The brand's flagship is the Octavius Squeezer, an analog bass synthesizer in a compact floor format that combines synth, octave, fuzz, and envelope filter voices routed through a reconfigurable analog signal path controlled by a digital preset system, with an onboard tuner and tap-tempo metronome. Alongside it, Chunk Systems produced the Agent 00Funk envelope filter — later revised as the Agent 00Funk Mark II — and the Brown Dog gated fuzz, which pairs hard and soft fuzz modes with a gating circuit aimed at synth-like bass tones. An earlier fuzz, the FZ002, preceded the Brown Dog in the lineup.

The pedals earned a following among bassists looking for analog synth textures without stepping into rackmount or keyboard territory, and the Agent 00Funk in particular drew public praise from funk bassist Bootsy Collins. Original Chunk Systems units are now scarce on the used market and tend to command premium prices through shops like Reverb.

Chunk Systems has 3 products cataloged on Equipboard, including Bass Effects Pedals. Their gear is featured by 2 artists, with the strongest followings in Funk / Soul, Rock, and Jazz. Notable users include Bootsy Collins and Paul Bander.