| Input voltage | 120 Volts |
|---|---|
| Mounting type | Floor Standing |
| Material | Wood |
| Model name | TX18S |
| Speaker type | Subwoofer |
| Special feature | DSP Based EQ, Selectable Low Pass Filter, Portable, Durable |
| Recommended uses for product | For Live Performance, For PA systems, For professional audio setup |
| Compatible devices | DJ Mixer, Powered Speakers |
| Subwoofer diameter | 18 Inches |
| Unit count | 1.0 Count |
| Surround sound channel configuration | 1.0 |
| Colour | Black |
| Included components | TX18S |
| Product Dimensions | 58.5D x 58.5W x 58.5H Centimetres |
| Item weight | 37.6 Kilograms |
| Is waterproof | False |
| Warranty type | Limited |
| Number of Items | 1 |
| Control method | Touch |
| Speaker size | 18 Inches |
| Power source | Corded Electric |
| Manufacturer | inMusic Brands Inc. |
| Model | TX18S |
| Part Number | TX18S |
| Special features | DSP Based EQ, Selectable Low Pass Filter, Portable, Durable |
| Speaker Amplification Type | Active |
| Batteries included | No |
| Batteries Required | No |
| Material Type | Wood |
| Manufacturer | inMusic Brands Inc. |
| Item model number | TX18S |
| ASIN | B0DP7R7XQY |
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ALTO TX18S 900W 18" Subwoofer, DSP-Enhanced Powered PA Speaker with 3" Voice Coil, Superior Bass, Easy Setup
Delivery & Support
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- For the 2025 holiday season, eligible items purchased between 1 November and 31 December 2025 can be returned until 31 January 2026.
Our specialist Customer Support for large items dispatched from 鶹 is on hand to help with your order. Contact us via phone or chat 7 days a week.
Purchase options and add-ons
| Brand | ALTO |
| Speaker maximum output power | 900 Watts |
| Frequency response | 100 Hz |
| Connectivity technology | XLR |
| Audio output mode | Stereo |
About this item
- Sonic Might for Your PA System - 900W subwoofer with 18-inch high-output woofer, 3-inch voice coil and ultra-efficient Class-D amplifier, extending the low-end frequencies, adding bass to your sound
- Rock-Solid Sound - Featuring DSP-based EQ and protection, and selectable Low Pass Filters to switch the frequency response and seamlessly integrate with any speaker
- For DJs and Musicians Alike - Selectable Music/Live voicing modes easily handle deep bass frequencies and project them into any large-scale venue, nightclub, house of worship, or place of business
- The Anchor of Your Sound - Extended thunderous bass and selectable DSP Low Pass Filter of 80Hz/100Hz/120Hz at 24dB per octave; hook up to powered speakers or DJ setup and shake your crowd every time
- Optimized for Portability - This active sub comes with convenient side handles and caster threads at the rear of the cabinet for easy transportation even at 87.7 lbs/39.8 kg (casters sold separately)
- Built to Last - Rugged, front-ported cabinet made from durable, resonant-free fiberboard, with heavy-use splatter-spray finish and full metal grille, integrated 36mm pole socket, overload protection
- Input Power - TX18S works in countries with 100/120V; 50/60 Hz
- Precision Engineered - This subwoofer and all other products in the TX Series are designed and tuned in the USA
- Easy Setup and Customization - No need for technical expertise to achieve optimal sound quality
Frequently bought together

Product information
Technical Details
Additional Information
| Date First Available | Jan. 31 2025 |
|---|---|
| Customer Reviews |
2.5 out of 5 stars |
| 鶹 Rank |
|
Feedback
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Product description
The Alto Professional TX18S subwoofer is engineered for those who demand powerful, deep bass and pristine sound clarity. Perfect for large venues, nightclubs, houses of worship, or even commercial spaces like restaurants and gyms, this 900W 18-inch subwoofer delivers a robust low-end response that you can feel and hear. Whether you're a DJ, musician, or event coordinator, the TX18S is built to withstand the rigors of transport and integrates effortlessly into any audio setup. Designed with ease of use in mind, the TX18S combines simple controls with superior performance, making it ideal for both professional sound engineers and beginners alike. With a powerful 18-inch driver and a 3-inch voice coil, the TX18S ensures deep, nuanced bass response that fills large spaces with vibrant low-end frequencies. Its 900W onboard amplifier provides distortion-free sound, even at maximum volume, while advanced circuitry and overload protection keep the subwoofer running smoothly. From its rugged, durable enclosure to its reliable performance in any setting, the TX18S stands out as the go-to subwoofer for sound professionals and venue owners alike.
From the brand
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All-in-One System w/ Bluetooth
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Tactile, Hands-On Mixing
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Battery-Powered PA System
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TS4 Series
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Battery Powered PA Speaker
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TX4 Series
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Accessories
From the manufacturer
MUCH MORE THAN SHEER SONIC FORCE
HEAR THE DREAM
Engineered for those who demand powerful, deep bass and pristine sound clarity, the TX18S subwoofer comes equipped with an ultra-efficient 900W Class-D amplifier, ready to deliver a robust low-end response that you can feel and hear.
Worry Less, Play More
Whether enhancing your live sound setup, upgrading your club or restaurant’s audio system, or looking for a reliable subwoofer for mobile gigs, the TX18S is the solution you’ve been waiting for.
Sonic Might and Reliability
With a powerful 18" driver and a 3" voice coil, the TX18S ensures deep, nuanced bass response that fills large spaces with vibrant low-end frequencies, seamlessly integrating with any speakers.
Built to Perform
A 900W onboard amplifier provides distortion-free sound, even at maximum volume, while advanced circuitry and overload protection keep the subwoofer running smoothly, no matter the environment.
Versatile and Easy to Use
Fully equipped with a metal grille, convenient side handles, 36mm pole socket for PA speaker mounting, XLR and 1/4" combo inputs, the TX18S is easy to integrate into any sound system or venue setup.
- DSP-Enhanced Sonic Might - Thanks to an 18" high-output driver with a 3" voice coil, the TX18S can handle the nuanced, deep bass frequencies that are all too commonly lost when using standard full-range speakers
- Multiple Output Modes - Two different Live and Music EQ voicing modes allow users to switch the subwoofer's frequency response to seamlessly integrate in music playback or DJ settings and live performance settings
- Selectable Low Pass Filter - Select the center frequency of the LP Filter (120 Hz, 100 Hz, or 80 Hz) to match any speaker with the press of a button as opposed to having to fuss with complicated, multifaceted controls
- Polarity Reverse - Press this button to reverse the phase of the subwoofer output to compensate for low-frequency cancellation
- Built to Last - Rugged, internally braced front-ported MDF cabinet with 36mm pole socket and full metal grille for premium style and protection; splatter-spray finish retains sleek appearance even with heavy use
- Optimized for Portability - TX18S comes with convenient side handles and caster threads at the rear of the cabinet for easy caster attachment. Casters not included; if desired, they must be 3", 76 x 44 mm, 150 lbs-rated
Ground-Shaking Bass
Low-end frequencies so rich and powerful, that your audience not only hears, but feels too.
Travels Well
Calling all DJs and musicians carrying equipment from location to location - the TX18S is here!
Straight-Out-of-the-Box
Make TX18S a permanent fixture of your restaurant, bar, cafe or gym - see how easy it is to use.
DSP-Based Equalization
Circuitry and overload protection ensure your low end is clean and clear even at full blast.
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| Customer Reviews |
2.5 out of 5 stars 2
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4.5 out of 5 stars 2,259
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4.5 out of 5 stars 84
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4.4 out of 5 stars 46
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4.5 out of 5 stars 74
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| Output Power | 900W peak, Class D | 900W peak, Class D | 2500W peak | 2500W peak | 2500W peak |
| Transducer Low/ Maximum SPL | 18" woofer / 126 dB | 12" woofer / 126 dB | 12" woofer/ 130 dB | 15" woofer/ 132 dB | 18" woofer/ 137 dB |
| Frequency Response | 36 Hz – 115 Hz (-3dB) | 46 Hz – 115 Hz (-3dB) | 44 Hz – 140 Hz (- 3 dB) | 36 Hz – 110 Hz (- 3 dB) | 29 Hz – 100 Hz (- 3 dB) |
| Dimensions (HxWxD)/ Weight | 585 x 585 x 585 mm / 39.8 kg 22.4 kg | 510 x 405 x 405 mm / 22.4 kg 39.8 kg | 454.7 x 459.7 x 505.5 mm/ 25.9 kg | 541 x 523 x 627 mm/ 39.51 kg | 678.2 x 530.9 x 627.4 mm/ 42.2 kg |
| Caster Mounts* | Yes/ *Casters Not Included | No/ *Casters Not Included | No/ *Casters Not Included | Yes/ *Casters Not Included | Yes/ *Casters Not Included |


