The SYNQ SQ-218 is a powerful dual 18-inch subwoofer designed for modern touring and fixed installations. Equipped with two high-efficiency neodymium drivers in a premium Baltic birch cabinet, it delivers deep, controlled low frequencies with excellent transient response. Rated at 2400 W AES at 4 ohms, it achieves a continuous 136 dB SPL with peaks up to 146 dB, extending down to 25 Hz (-10 dB) for impactful sub-bass you can feel. A sensitivity of 102 dB (1 W/1 m) ensures strong performance even with modest amplification.
The rugged black Polyurea finish and steel grille are built for the road, while the compact 118 x 80 x 56 cm footprint and 80 kg weight aid efficient truck packing and quick deployment. Equally effective ground-stacked, deployed in distributed bass arrays, or integrated beneath line arrays, the SQ-218 pairs cleanly with a wide range of full-range enclosures to deliver musical, high-impact low end.
Ideal for concert sound, clubs, theatres and corporate events where reliable, authoritative low frequency reinforcement is required.
Includes
- SYNQ SQ-218 Dual 18-inch Subwoofer | 2400W AES, 4 Ohm
STAGE1.7.100.75

