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A Jamaican technology associated with the ska era. Starter record pending editorial verification.

The 807 transmitting valve used in the custom tube amplifiers built for UK dub sound systems; in one documented design four of them delivered on the order of two thousand watts, prized for a warm, powerful bass timbre.

A Jamaican technology associated with the soundsystem era. Starter record pending editorial verification.

The disc-cutting machine that inscribes a mix onto a soft acetate blank, turning a studio version into a one-off dubplate; a key piece of sound-system electronics that made exclusive tunes a competitive currency.

The electronic crossover that splits the audio signal into bass, mid and treble bands before amplification so each band drives its own amplifier and cabinet, replacing passive networks of capacitors and coils in higher-powered rigs.

The frequency-splitting electronics that divide a sound-system signal into bass, mid and top bands for separate amplification, central to the multi-way 'string' architecture of UK dub sets and a defining feature of custom pre-amps.

The iron-cored transformer that couples a valve amplifier to its speakers; in Jamaica the winding of these coils by hand, as King Tubby did to expand bass depth, became a signature electronics skill of the sound-system craft.

The heavy low-frequency loudspeaker at the heart of a bass bin, typically a fifteen-, eighteen- or twenty-one-inch cone, whose size and excursion the box is built around. Sound systems prize robust, high-excursion drivers.

A ported box loading that tunes a port to extend low frequencies, contrasted in sound-system practice with the horn-loaded scoop favoured for reggae weight. Used where a shallower, less horn-coloured bass was wanted.

The internal bracing, panel thickness and double-layering used to stop a speaker box from flexing and colouring the sound, a craft judgement that separates a tight, controlled bin from a boomy one.

The compression driver that feeds the mid-range and tweeter horns of a sound system, converting amplifier power into the efficient, penetrating mid and top essential to cutting through a bass-heavy mix.

Direct-coupled solid-state power amplifier (1967) delivering roughly 150W/channel with unprecedented reliability; a symbol of the transistor amplifier's arrival that let sound systems chase raw wattage without the fragility of valves.

Purpose-built bass bins and "house of joy" cabinets engineered to move air and reorganise public space with bass.

Small oscillator effect box, typically built around a pair of 555 timer ICs, that produces the swooping siren tones selectors use to lift tension and bridge records; a hand-built staple of the dance popularised on UK sound systems from the 1980s.

A one-off acetate cut, often a custom version voiced for a specific sound, central to clash culture and exclusivity.