HK Audio PRO18s

A Solid Foundation for Expanding Your Sound System

The PRO18s is a passive subwoofer designed to provide the essential low-end support required by sound reinforcement systems that need greater impact in the lower frequency range. Its 18-inch loudspeaker handles the low frequencies that full-range speakers alone may struggle to reproduce effectively.

In a complete setup, it supports the main speakers to deliver a more balanced, fuller and more convincing sound. Vocals, instruments and mix details remain the responsibility of the main speakers, while the subwoofer reproduces the energy of kick drums, bass lines, synths and low-frequency effects.

An 18-Inch Subwoofer for DJs, Bands and Event Performances

This subwoofer is designed for mobile DJs, entertainers, bands, sound engineers and event professionals looking to enhance their sound reinforcement system with dedicated low-frequency reproduction. It is particularly well suited to musical styles where the lower end plays a central role: electronic music, hip-hop, reggae, rock, funk, pop and dance music.

The PRO18s is a natural fit for private parties, weddings, community events, concerts, rehearsals, bars, small venues and fixed installations. Paired with suitable satellite speakers, it helps create a more physical and immersive listening experience, including in spaces where a simple pair of speakers cannot provide the desired depth on its own.

Like any passive model, it requires an external power amplifier. This approach provides plenty of freedom to build a custom setup, choose amplification suited to your needs and expand your equipment inventory over time as your performances evolve.

Putting Low-End Performance at the Heart of Your Sound System

Thanks to its 18-inch loudspeaker, the PRO18s is designed to deliver powerful low-end presence capable of supporting energetic musical programmes. It relieves the main speakers of the lowest frequencies, which can improve the overall clarity of the system and provide greater headroom for midrange and high-frequency reproduction.

For the best performance, suitable crossover filtering between the subwoofer and satellite speakers is recommended. A loudspeaker processor, active crossover or amplifier with the necessary settings makes it possible to distribute frequencies efficiently and maintain consistent operation across the entire system.

The passive design of the PRO18s is an advantage for users who already own amplification or want precise control over their audio chain. It can therefore be integrated into a DJ sound system, a PA system for a live band or an event installation requiring more generous low-frequency reproduction.

Technical specifications

Battery	No	Cutaway	No
Frequency response - start	48 Hz	Sensitivity	104
Frequency response - end	150 Hz	SPL max	128 dB
Category	Soundsystem	Speaker structure	MDF
Type	passive subwoofer	Transport	2 handles
Peak power	1500 W	Inputs	Speakon
Number of channels	1 channel	Outputs	Speakon
Bluetooth	No	Color	Black
Connection	NL4	Finishing	Wood
Speaker diameter	18"	Power output	500 W
Number of speakers	1	Quantity	1
EQ	No	Weight	39.8 kg
Cut-off frequency	150 Hz	Dimensions (mm)	530 x 610 x 640
Impedance	4 Ω

Loudspeaker	18 inches	Use	sound reinforcement system, DJ, live, events and fixed installation
Function	low-frequency reinforcement