ALTO PROFESSIONAL TX18S

A bass reinforcement designed for the TX series: the natural complement to Alto speakers

The TX18S was designed to extend the low end of a sound system, especially when paired with speakers from the Alto TX4 range. In a setup with satellites like the TX412 or TX415, it provides the foundation that full-range speakers alone often struggle to reproduce: the weight, stability, and physical sensation of low frequencies. The result is a more balanced, immersive, and "larger" listening experience, both on front of house and monitor mixes as needed.

Who it's for and intended uses: DJs, bands, clubs, and events

This active subwoofer is suited for any situation where clear and present bass is expected: DJ performances, small to medium-sized concerts, events, places of worship, bars, clubs, and discos, as well as event installations. The TX18S is ideal for musicians seeking a tighter kick drum and more defined bass, as well as DJs looking for a punchy kick and enveloping sub-bass. It is also relevant for providers who want a robust subwoofer that is quick to deploy without complex settings.

Settings, DSP, and ergonomics: focusing on essentials without sacrificing control

The TX18S emphasizes immediate usability: the goal is to quickly achieve bass suited to the music and the room without navigating multiple menus. Its amplification includes protection circuits and DSP-based processing, useful for maintaining clean and controlled bass at higher levels while protecting the system during extended use.

Two EQ modes to adapt to the program

With its "Music" and "Live" presets, the TX18S allows you to select a response more appropriate to the context: recorded music, DJ set, or live performance. This quick choice helps better integrate the subwoofer with the rest of the system and reduces last-minute adjustments during setup.

Low-pass filter and polarity inversion: cleaner integration with satellites

The selectable low-pass filter (80 Hz / 100 Hz / 120 Hz) facilitates matching with your main speakers depending on their size and low-frequency extension. Polarity inversion is a simple but essential feature to optimize coherence between sub and satellites based on placement (floor, cluster, near a wall) and room acoustics. The result is a more stable low end, less "hollow" at the crossover frequency, and a better-preserved punch sensation.

Front-ported bass-reflex design: efficiency and projection

The front-ported bass-reflex enclosure enhances projection and efficiency in the bass range while simplifying stage or front-of-house positioning. Combined with a robust MDF cabinet with internal bracing and a metal grille, this design aims for durability and consistent performance in repeated use scenarios.

Technical specifications

Battery	No	Cutaway	No
Category	Soundsystem	SPL max	126 dB
Type	active subwoofer	Speaker structure	MDF
Peak power	900 W	Transport	2 handles
Number of channels	1 channel	Frequency response - start	37 Hz
Amplification	Active amplified	Frequency response - end	110 Hz
Application	Facade	Inputs	2 x combo XLR/jack
Bluetooth	No	Outputs	2 x XLR
Connection	XLR	Color	Black
Speaker diameter	18"	Finishing	Matt
Number of speakers	1	Power output	900 W
DSP	Yes	Weight	37.6 kg
EQ	Filter	Dimensions (mm)	585 x 585 x 585
Baseplate width	36 mm

Driver	18 inches	Controls	level with 0 dB center point, limiter LED
Voice coil	3 inches	Selectable low-pass filter	80 Hz / 100 Hz / 120 Hz
Frequency response	36 Hz - 115 Hz	Pole mount	36 mm
Maximum SPL	126 dB @1m	Weight and dimensions	37.6 kg, 585 x 585 x 585 mm
EQ presets	Music and Live