S 21a

Touring Subwoofer Self-powered

Touring high performance self-powered 21″ subwoofer

Transducers	LF : 1 x 21″
SPL max / 1m (measured)	139 dB
Weight	60kg / 132.27lbs
Rigging	Pole mount

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Description

S 21a is a compact, high-performance self-powered touring subwoofer, designed to complement our FR-X, ARES 8 and ARES 12 series in sound reinforcement applications scaling to full stadium shows.

S 21a houses a long excursion 21″ neodymium driver and combines front diffusion, bass reflex, and transmission line design for maximum efficiency and outstanding SPL.

Rental companies favor S 21a as an alternative to industry-standard 2×18” subs, saving half the truck space and around 40% of the weight. The subwoofer can be deployed standalone, stacked or flown, making it a versatile, high-earning hire stock staple.

S 21a features an advanced AUDIOFOCUS Class D amplifier module with integral DSP and dedicated presets. Presets include omni, cardio (Front-Back) and end fire variants.

S 21a is built with pride in Belgium and coated in tough, weather-resistant polyurea to safeguard your investment. The cabinet front is protected by a rigid metal grill, backed by acoustically transparent foam.

Features

Powerful bass-reflex T-line design
Lightweight and portable
Pole mount socket
Self-powered plug ‘n play
6 presets

Technical specifications

Description	High-power self-powered subwoofer
Transducers	LF: 1 x 21″
Frequency range (-6dB)	28Hz-100Hz
SPL max (1)	139 dB
Processing	Dedicated AUDIOFOCUS SCiO omni and cardio presets
Rigging	Pole socket
Audio Connectors	IN: 1×3-point XLR LINK: 1×3-point XLR
Cloud Power-DANTE/AVB connectors	2 x etherCON
Power Connectors	IN: 1×3-point powerCON LINK: 1×3-point powerCON
Dimensions (H x W x D)	590 x 750 x 655 mm 23.22 x 29.52 x 25.78 inches
Weight	60kg / 132.27lbs
Finish	Highly resistant polyurea coating
Cabinet	High grade birch plywood