LD Systems ICOA PRO SUB 21 A, Powered Bass Reflex PA Subwoofer with App Control – 21 Inch

The LD Systems ICOA PRO SUB 21 A is a powerful 21″ active bass reflex subwoofer designed to deliver deep, punchy, and precise bass for demanding professional setups. Equipped with a 4.5″ neodymium voice coil and powered by a 1500W RMS (3000W peak) Class-D amplifier, this subwoofer reaches up to 136 dB SPL and extends down to 29 Hz—making it perfect for mobile DJs, live events, clubs, and fixed installations.

Its advanced SysCore DSP provides smart FIR/IIR filtering, adjustable delay (up to 50 m), and six application presets, including cardioid and low-latency modes. You can configure and control the subwoofer via the onboard color display with one-knob control or wirelessly using the free ICOA PRO app over Bluetooth 5.1 with True Wireless Stereo and Mirroring.

Built into a rugged birch plywood cabinet with a shock-resistant grille and durable polyurea coating, it includes M20 pole mounts, stacking recesses, ergonomic handles, and airflow-optimized ports for professional, reliable performance on the road or on stage.

Product Specifications:

Peak Output Power: 3000W

RMS Output Power: 1500W

Amplifier Class: Class D

Max SPL (Pink Noise, 1m): 136 dB

Frequency Response: 29 Hz – 80 Hz

Enclosure: 15–18 mm birch plywood with polyurea coating

Handles: 8 ergonomic handles

Mounting: 2x M20 threaded pole mounts (vertical & horizontal)

Cooling: Fanless with airflow-assisted design

Driver

Size: 21″ (533.4 mm)

Magnet Type: Ferrite

Voice Coil: 4.5″ (114.3 mm)

Inputs/Outputs

Inputs: 2x XLR (3-pole, female)

Outputs: 2x XLR Thru (3-pole, male)

Power Connector: PowerCON with loop-through

DSP & Signal Processing

SysCore DSP with FIR/IIR filters

AD/DA Conversion: 24-bit / 48 kHz

SNR: ≥108 dB

Delay: Up to 50 meters

Presets: 6 (including cardioid and low-latency modes)

EQ: 4-band parametric EQ

Bluetooth

Version: 5.1

Features: Audio Streaming (A2DP), TWS, TWS Mirroring, App Control

Codecs: SBC, AAC

Power Supply

Voltage: 100–240V AC, 50/60 Hz

Rated Power: 1300W

Power Supply Type: SMPS

Fuse: T10AH/250V

Environmental

Operating Temp: 32°F to 104°F (0°C to 40°C)

Max Humidity: 80% (non-condensing)

Included Items

1x LD Systems ICOA PRO SUB 21 A

1x Power Cord

Dimensions (W x H x D): 22.25″ x 27.56″ x 27.52″

Weight: 125.2 lbs (56.8 kg)

Shipping Dimensions and Weight

Shipping Dimensions (W x H x D): 26″ x 30″ x 30″

Shipping Weight: 140 lbs