LD Systems ICOA SUB PRO 21 A

Essential Information About the ICOA PRO SUB 21 A Subwoofer

• Massive bass down to 29 Hz thanks to a 21-inch neodymium high-excursion driver and 4 oversized bass-reflex ports.


• Tour-grade power: Class D amplifier delivering 1500 W RMS (3000 W peak) for 136 dB SPL with a wide dynamic headroom.


• Advanced control: SysCore DSP with FIR/IIR filters, 4-band EQ, delay up to 50 m, and selectable crossover frequencies at 80/100/120 Hz.


• Road-ready: compact birch plywood enclosure, 8 handles, 2 M20 pole mounts, secure stacking, and PowerCON Loop-Thru.

A 21-Inch Driver That Redefines Compactness on the Road

Designed for tours and rental companies, the ICOA PRO SUB 21 A combines impactful infrasonic bass with a compact footprint. Its 15-18 mm birch plywood cabinet with a rugged textured finish withstands intensive use. At only 562 mm wide, it easily fits into the most common vans and stacks securely both horizontally and vertically thanks to molded stacking grooves.

Who Is It For and What Are Its Uses?

Ideal for mobile DJs, clubs, live stages, festivals, and fixed installations, this 21-inch subwoofer delivers a spectacular foundation while maintaining precise and fast response. Dedicated presets, including a cardioid mode, facilitate integration in stereo setups or subwoofer arrays, ensuring consistent low-frequency control in rooms of various sizes.

DSP, Control, and Simplified Integration

At the heart of the system, the SysCore DSP ensures clean sound protected by advanced limiters and thermal/electrical monitoring. The 4-band parametric equalizer and delay up to 50 m allow precise alignment of the subwoofer with any system. Three switchable crossover frequencies (80/100/120 Hz) optimize coupling with your tops. The user interface combines a color screen with a single encoder and the free "ICOA PRO" app (iOS/Android) for wireless control, networking multiple speakers, and quick creation of stereo configurations (up to two tops and four subs), with music streaming management via Bluetooth 5.1 and TWS. The front LED facilitates quick identification and limiter status at a glance.

On the connectivity side, two XLR inputs, two XLR-THRU outputs, and a PowerCON Loop-Thru mains output speed up cabling and system expansion.

Technical specifications

Battery	No	Cutaway	No
Number of channels	1 channel	Speaker structure	wood
Bluetooth	No	Inputs	XLR
Speaker diameter	21"	Outputs	XLR
Number of speakers	1	Color	Black
EQ	Yes	Power output	1500 W
Media Player	Bluetooth

Class D amplifier	1500 W RMS / 3000 W peak	Front LED	identification, power, limiter status
Maximum SPL	136 dB	Subwoofer width	562 mm
Switchable crossover frequencies	80 Hz, 100 Hz, 120 Hz	Optional accessories	ICOA PRO SUB CB rolling dolly, protective covers
Application presets	low latency, cardioid mode, etc.