Sweetwater Welcomes Turtle AV

Alto Professional TS18S 18-inch Powered Subwoofer

2,500W Powered Subwoofer with 18" LF Driver, EQ Presets, and Phase Alignment Selector
Share
Item ID: TS18Sub
Alto Professional TS18S 18-inch Powered Subwoofer
Price:$799 and 00 cents
Special Financing - Ends Aug 2, 2026. $23/month with 36 month financing*

In Stock!

Note: While most of the items we sell ship for free, this item does not qualify for free shipping due to special circumstances.
Add to Cart
Sales engineer photo
Ask An Expert

Our expertly trained Sales Engineers are ready to help!

What is a Sales Engineer?
Sweetwater Gear Exchange

Have one to sell?
Check out Sweetwater's Gear Exchange!
Learn More

Alto Professional TS18S 18-inch Powered Subwoofer
In Stock!
Price:$799 and 00 cents
Add to Cart
Add to list
Skip to Description
Most Popular Accessories & Related Items
Back to navigation

This article was Written By

Our Product Research Team

Get to know them!

A Serious Upgrade for Bass-deficient PA Setups

The Alto Professional TS18S offers a rock-solid solution for bass-deficient PA systems. This powered subwoofer's high-efficiency Class D amplifier delivers a hefty 2,500 watts of rafter-shaking low end via a premium 18-inch driver with a 3-inch high-temperature voice coil. The TS18S integrates effortlessly into any live sound setup, boasting dual combo inputs and XLR outputs, dual XLR thru ports for linking, user-selectable EQ presets, and a phase alignment switch. This active sub is eminently roadworthy as well, sporting a rugged, internally braced, front-ported MDF cabinet with an integrated 36mm pole socket, a mark-resistant splatter-spray finish, and comprehensive protection circuitry. The Alto Professional TS18S is a surefire method for upgrading an underperforming sound reinforcement system.

2,500 watts of thunderous low end

Armed with 2,500 muscular watts of Class D power, the TS18S is one of the most formidable active subwoofers in its class. The TS18S comes loaded with a premium 18-inch driver featuring a 3-inch high-temperature voice coil, yielding thunderous low end all the way down to 29Hz. Show after show, night after night, the TS18S is engineered to elevate the low-frequency output of any live performance in permanent install scenarios and mobile setups alike.

Brimming with high-tech features

Here at Sweetwater, we're impressed with how much functionality Alto Professional packed into the TS18S. For starters, it includes two combo inputs that accommodate XLR and 1/4-inch connectors. You also get two balanced XLR line outputs and two XLR thru ports for linking. User-selectable EQ tunings automatically tailor the TS18S for various applications. A phase alignment selector switch rounds out this sub's outstanding feature set.

Engineered to withstand the rigors of live performance

The TS18S is a powered subwoofer built to last. It's housed in a near-bulletproof, internally braced, front-ported MDF cabinet with an integrated 36mm pole socket for simplified speaker installation. Its mark-resistant splatter-spray finish will continue to look great, even after several seasons of punishing use. You also get electronic clip, thermal, and transducer overdrive protection to safeguard your sub against all sorts of road-borne hazards.

Alto Professional TS18S 18-inch Powered Subwoofer Features:

  • High-efficiency Class D amplifier delivers 2,500W of rafter-shaking low end
  • Premium 18-inch driver is augmented by a 3-inch high-temperature voice coil
  • 2 combo inputs accommodate XLR and 1/4-inch connectors; 2 balanced XLR outputs; 2 XLR thru ports for linking
  • User-selectable EQ tunings (Off, Live, DJ)
  • Phase alignment selector switch (0°/90°/180°/270°)
  • Integrated 36mm pole socket for simplified speaker installation
  • Near-bulletproof, internally braced, front-ported MDF cabinet
  • Mark-resistant splatter-spray finish will look great after punishing use
  • Electronic clip, thermal, and transducer overdrive protection

Resources

Warranty Info

Sweetwater's FREE 2-Year Total Confidence Coverage Warranty

Extra peace of mind at no extra cost.

  • Save money with FREE parts and labor
  • Get back to making music with the industry's fastest turnaround time
  • Fix it the first time with our award-winning, factory-certified Service Department
Learn More about Total Confidence Coverage
Back to navigation

Tech Specs

  • Powered: Yes
  • LF Driver Size: 18" Woofer
  • Total Power: 2500W Peak
  • Inputs: 2 x XLR-1/4" combo
  • Outputs: 2 x XLR (thru)
  • Frequency Range: 27Hz-111Hz (-10dB)
  • Frequency Response: 29Hz-100Hz (-3dB)
  • Maximum Peak SPL: 137dB SPL @ 1m
  • Mounting Options: Floor
  • Power Source: Standard IEC AC cable
  • Enclosure Material: MDF
  • Height: 26.7"
  • Width: 20.9"
  • Depth: 24.7"
  • Weight: 93.0 lbs
  • Manufacturer Part Number: TS18SXUS

What Makes Our Sales Engineers Great?

Sweetwater Sales Engineers are a world-class team of experts dedicated to you. Hand selected from across the globe, each brings a wealth of experience and expertise in the world of music gear to provide you with unparalleled service completely free of charge. Friendly relationships, real trust, and the right gear are only a call or a click away!

Back to navigation

Reviews

INCREDIBLY AWESOME SOUND!
Incredibly slammin' hard, awesome sound! Off the frickin' hook deep bass!
These are just what I needed to fill out my studio/sound set up...
Thank you Tyler and everyone at Sweetwater ;)
Take care...God bless...
Don from Don's Computer Services, Repairs, Sales...
Music background: 50+ years playing drums, percussion...
Impressive
Damm good subs for the price. No need to run hard as they have alot of punch. Setting at the most at 1 o'clock
Music background: Dj for 30+ year's
The BEST BANG for your buck! Solid sound.

I have paired this subwoofer with 2 Alto TS10s, with 2 LD Systems ICOA, with 2 Mackie SRT15 and ALTO TS18s kicks some major butt. You do not have to push too hard, the bass hit is deep and loud, obviously this speaker has it's limit but I can reliably say one speaker can handle a crowd of 100 to 150 people, with 2 of these, possibly 150 to 200 people. I can't stress enough how good this speaker sounds. I have paid over $ for subs that don't hit as hard as the Alto TS18s (Average price is under $). Alto has up the game to compete and beat its competition. I have become a fan.

Music background: Mobile DJ Services
Just played our first show with these. amazed!
We were using a nice set of passive 18" Yamahas that were replaced by these. We also upgraded the rest of our system with a Presonus tablet mixer and a set of the powered Alto 12"/horn tops. The venue was a small club (100 -150) and their concern was the bands are always too loud. I know the we crossed these over a little lower than the Yamahas, but we got a nice thump that you could feel, but still were able to keep the overall volume to that made the club manager happy. A former band member came by and was shocked at how good the PA sounded.
Music background: been playing bass in cover bands for decades.
AWSOME SUB!!
IT DOES NOT DISAPPOINT!!! AWSOME/GREAT SUB!!!!.