Pricing and availability

We compare 600+ stores and found this item at 7 stores. Prices updated .

Sweetwater
5.0 (2)
$599.00 $499.00 $100.00 · All time low
Amazon
3.9 (13)
$499.00
Reverb
$499.00 New
$479.86 Used
B&H
$599.00 $499.00 $100.00 · All time low
Thomann
4.7 (3)
$515.00 $511.00 $4.00 · All time low
Gear4Music
£500.00

Price History

Based on price data from 4 merchants for "Alto Professional TX18S 18" Powered Subwoofer". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

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Description

Discover the power of bass with the Alto Professional TX18S 18" Powered Subwoofer. Engineered for musicians and sound professionals who need robust low-end support, this subwoofer packs a punch with its 900W Class-D amplifier, delivering clear and dynamic bass frequencies that can fill any medium to large venue. The TX18S's enhanced DSP technology ensures optimal sound performance with features such as Music and Live EQ voicings, selectable low-pass filters, and a polarity reverse switch, allowing for tailored audio experiences.

The TX18S is designed for durability and ease of use. Its rugged, internally-braced MDF cabinet, complete with a full-metal grille and mar-resistant finish, ensures it can withstand the rigors of travel and frequent use. Connectivity is versatile with two combo XLR-1/4" inputs and two XLR outputs, making it a seamless addition to your existing PA setup. Whether you're a touring musician or a venue owner, the TX18S offers reliable bass enhancement with easy integration.

Key Features:

  • 900W Class-D power amplifier
  • 18" high-output woofer with a 3" voice coil
  • DSP-based EQ with Music and Live voicings
  • Selectable low-pass filters (80/100/120 Hz)
  • Polarity reverse switch
  • Two combo XLR-1/4" line inputs and two balanced XLR line outputs
  • Rugged MDF cabinet with a full-metal grille
  • Side handles for easy transport
  • 36mm pole socket for installation

Product specs

Powered Yes
LF Driver Size 18" subwoofer
Total Power 900W Class D
Inputs 2 x XLR-1/4" combo
Outputs 2 x XLR
Mounting Options Pole
Power Source Standard IEC AC cable

FAQs

What type of venues is the Alto Professional TX18S suitable for?

The Alto Professional TX18S is ideal for medium to large venues such as clubs, theaters, and live stage performances, providing powerful bass reinforcement with its 900W amplifier and 18" driver.

How does the Alto Professional TX18S integrate with existing PA systems?

The TX18S features Live and Music EQ modes and selectable Low Pass Filters, allowing seamless integration with existing speakers for enhanced low-frequency performance.

What are the input and output options on the Alto Professional TX18S?

The subwoofer offers 2 x XLR-1/4" combo inputs and 2 x XLR outputs, providing flexible connectivity options for various audio setups.

Does the Alto Professional TX18S have any protection features?

Yes, the TX18S includes an overload protection feature within its 900W amplifier, ensuring clean and reliable performance even at high volumes.

Can the Alto Professional TX18S be mounted on a pole?

Yes, the TX18S is designed with a pole mounting option, allowing it to be easily integrated into existing sound setups.

Reviews

PROS

  • Compact size for an 18" subwoofer, easier to transport

  • Delivers impressive sound quality at a budget-friendly price

  • Handles medium-small venues effectively without overwhelming volume

  • Performs well with live bands and smaller events

  • Lightweight design for its size, convenient for transport

  • Reliable performance with no buzzing or distortion under stress

  • Molded handle with smooth edges for comfortable carrying

CONS

  • Begins to red light when pushed too hard alone

  • Not the loudest subwoofer compared to higher-end models

  • Requires careful EQ management to avoid issues with certain tracks

  • Limited EQ controls; only boosts high and low ends

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Alto Professional TX18S 18" Powered Subwoofer.

Build quality

  • The TS18S subwoofer is praised for strong build quality, with protection against clipping, making it durable for extended gigs without blowing out.

    Source

Features and functionality

  • The Alto TS18S lacks a high pass filter; users should ensure their tops can high-pass themselves or choose subs with built-in filters.

    Source

User experience

  • Owners note the TS18S provides clear, distortion-free low end, performing well with genres like dub and reggae.

    Source

Setup and maintenance

  • The Alto sub's residual noise is present but becomes unnoticeable during performances, similar to older PA amps.

    Source

Use cases and applications

  • Users report the TS18S can handle outdoor field gigs with 8-hour sets, maintaining loud and clean sound.

    Source

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