Open Source Designs.Precision Flatpacks.

Making legendary open-source speaker designs available via audio-knowledgeable CNCers to the wider public.

CNC-cut flatpack kits from 18Sound and B&C designs. Optional drivers, build service, and finishing. UK manufactured by GNK Audio.

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Available Designs

Open source subwoofer designs, precision CNC cut and shipped as flatpack kits. Choose your design, configure your options, and build.

18Sound

18Sound Manifolded Double 21"

Manifolded Double 21" Bandpass Subwoofer

Manifolded bandpass subwoofer. Three driver options, one legendary design.

2× 21"3 driver options18mm Baltic Birch Plywood

from £899View Design

B&C Speakers

B&C S218BP

6th Order Bandpass Subwoofer

6th order bandpass. Two driver tiers, serious low-end.

2× 18"2 driver options15mm Birch Plywood

from £799View Design

More designs coming soon. Request a custom build quote for any open-source design.

Have your own design?

Share a link to your plans and we'll quote for flatpack CNC cutting, driver sourcing, customisation, or a full build and finishing service.

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Brought to you by

UK manufacturing precision and brand expertise, making open-source speaker designs accessible to the wider audio community.

Technology & Operations

00 Audio

Brand, design, finish and operations. Visually striking venue fit-outs, audio for home, clubs and festivals. Building software for the DIY community. Aiming to bring quality experiences to the eyes and ears of music-led venue goers.

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Manufacturing & CNC

GNK Audio

Over a decade of cabinet building expertise, designing and fitting out venues. From musician to engineer, toured with The Sunshine Underground, engineered for Towers of London, Liberty X. Manufactured for Miles Kane, Bill Ryder-Jones, Wonderhorse, John Grant, Municipal Waste. In-house CNC wizard.

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