S 21i

Install Subwoofer Passive

Installation high performance compact 21″ subwoofer

Transducers	LF : 1 x 21″
SPL peak / 1m (measured)	139 dB
Weight	58,8kg / 129.63lbs
Rigging	M8 threaded insert

View All Products Download technical sheet

Share this product

Overview Related Products Downloads

Description

S 21i is a compact, high-performance passive subwoofer for fixed installations, designed to complement our FR-X, ARES 8 and ARES 12 series in theatres, houses of worship, live music venues, stadiums, and other sound reinforcement applications.

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

Deployed standalone, stacked, or flown, S 21i adapts to mirror the needs of the venue and offers huge space and weight savings compared to industry-standard 2×18” subs.

S 21i 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.

S 21i can be quickly deployed in any configuration, including cardioid and end-fire, when used with AUDIOFOCUS A Series amplifiers. Armonia presets are also available for Powersoft amplifiers.

Features

Powerful bass-reflex T-line design
Optimized for installation
Lightweight and portable
Threaded inserts
Passive

Technical specifications

Description	High-power subwoofer
Transducers	LF: 1 x 21″
Frequency range (-6dB)	28Hz-100 Hz
SPL peak (1)	139 dB
Processing	Dedicated AUDIOFOCUS SCiO and Armonia/Powersoft omni and cardioid presets
Rigging	M8 threated insert
Connectors	2 × 4-point speakON
Nominal Impedance	8ohm
Watt AES/peak	1700/6800W
Dimensions (H x W x D)	590 x 750 x 655 mm 23.22 x 29.52 x 25.78 inches
Weight	58.8kg / 129.63lbs
Finish	Highly resistant polyurea coating
Cabinet	High grade birch plywood