LD-Systems ICOA Pro Sub 21 A Active Subwoofer

ICOA PRO SUB 21 A - Compact 21" subwoofer with impressive low bass power

The ICOA PRO SUB 21 A combines uncompromising bass performance with a practical, roadworthy housing design. The active 21-inch subwoofer with bass reflex principle impresses with its specially developed neodymium driver, which delivers massive, precise and powerful low frequencies - ideal for mobile DJs, clubs, large stages or permanently installed sound systems.

Powerful long-throw woofer with neodymium drive

At the center is a particularly powerful 21-inch driver with a 4.5" neodymium magnet motor. Thanks to its long-throw design and finely tuned suspension, the speaker produces a surprisingly contoured, dry bass sound with excellent definition right down to the lowest frequency ranges.

Power reserves for every application

The integrated Class D power amplifier delivers an impressive 1500 watts RMS (3000 watts peak) and enables a maximum sound pressure level of up to 136 dB SPL - so even demanding applications are no problem. Four large, streamlined bass reflex channels ensure deep output down to 29 Hz and a superior low-end that asserts itself in any environment.

Advanced signal processing with SysCore DSP

With its integrated SysCore digital processor, the subwoofer guarantees distortion-free and precise sound reproduction - even at extremely high levels. FIR and IIR filters, extensive limiter functions and protection mechanisms for thermal and electrical safety ensure stable operation even under the toughest conditions.

Flexible adaptation to any setup

Thanks to the parametric 4-band EQ, adjustable Delay (up to 50 m) and selectable crossover frequencies at 80 Hz, 100 Hz and 120 Hz, the subwoofer can be ideally adapted to different systems. In addition, presets for cardioid arrangements and low-latency monitoring are already integrated.

Smart operation - local and wireless

The system is controlled either directly via the easy-to-read color display with one-button navigation or conveniently via the "ICOA PRO" app (for iOS & Android). All settings can be made wirelessly via the app, speakers can be networked and setups such as a Bluetooth stereo system with two tops and four subs can be configured in no time at all - including direct music streaming via Bluetooth 5.1 and TWS function. A status LED on the front panel provides information on the limiter status and facilitates identification during stage operation.

Practical housing design

Two XLR inputs, two XLR THRU outputs and a powerCON loop output enable simple system cabling. Thanks to two M20 stand flanges and integrated stacking recesses, the subwoofer can be stacked and mounted versatilely, both horizontally and vertically.

The robust cabinet is made of 15 to 18 mm thick birch plywood, coated with a durable polyurea coating and designed to retain the dimensions of a typical 18" model despite the 21" driver. With a width of only 562 mm, it is optimised for many common transport solutions (e.g. Sprinter or TRANSflex cases) and fits perfectly in vans such as the Mercedes Sprinter, VW Crafter or Ford Transit.