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Alto Professional TS15S 15-inch Powered Subwoofer

2,500W Powered Subwoofer with 15" LF Driver, EQ Presets, and Phase Alignment Selector
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Item ID: TS15Sub
Alto Professional TS15S 15-inch Powered Subwoofer
Price:$699 and 00 cents
Special Financing - Ends Aug 2, 2026. $20/month with 36 month financing*

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Alto Professional TS15S 15-inch Powered Subwoofer
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Price:$699 and 00 cents
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A Serious Upgrade for Bass-deficient PA Setups

The Alto Professional TS15S 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 15-inch driver with a 3-inch high-temperature voice coil. The TS15S 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 TS15S is a surefire method for upgrading an underperforming sound reinforcement system.

Note: This subwoofer does not have built-in crossover functionality. Please contact your Sweetwater Sales Engineer if you have any questions.

2,500 watts of thunderous low end

Armed with 2,500 muscular watts of Class D power, the TS15S is one of the most formidable active subwoofers in its class. The TS15S comes loaded with a premium 15-inch driver featuring a 3-inch high-temperature voice coil, yielding thunderous low end all the way down to 36Hz. Show after show, night after night, the TS15S 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 TS15S. 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 TS15S 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 TS15S 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 TS15S 15-inch Powered Subwoofer Features:

  • High-efficiency Class D amplifier delivers 2,500W of rafter-shaking low end
  • Premium 15-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

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Tech Specs

  • Powered: Yes
  • LF Driver Size: 15" Woofer
  • Total Power: 2500W Class D
  • Inputs: 2 x XLR-1/4" combo
  • Outputs: 2 x XLR (full-range thru)
  • Frequency Range: 31Hz-123Hz (-10dB)
  • Frequency Response: 36Hz-110Hz (-3dB)
  • Maximum Peak SPL: 132dB SPL @ 1m
  • Signal Processing: EQ Presets (off, Live, DJ)
  • Features: Polarity Switch (0°/90°/180°/270°)
  • Mounting Options: Floor, 36mm Pole Sock
  • Power Source: Standard IEC AC cable
  • Enclosure Material: MDF
  • Height: 21.3"
  • Width: 20.6"
  • Depth: 24.7"
  • Weight: 87.1 lbs
  • Manufacturer Part Number: TS15SXUS

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Reviews

We finally have Bass in the house
We added the Alto Professional TS15S to our mix at church a few weeks ago. Removal of the bass and kick drum from the mains and routing to this sub really cleaned up our house mix. We should have done this sooner!
Music background: Worship Pastor
Awesome SUB..
Great for loud tight bass response. A must for those needing to add low frequency to your setup.
Great power
Ordered on Monday received on Wednesday, not bad at all. Used this subject with my EV ZLX 12s, WOW!! What a great sounding sub, good bang for the buck, definitely will order a second one.
Massive
Massive in every aspect. Yes, it weighs about 90 lbs, but it has a massive output as well. I am using this with an electronic drum rig and two 10" floor monitors in our practice area. I've been using just the floor monitors, but wanted a bit more kick (pun intended). My rig is now louder than the guitarist !! I could easily just use my monitors and this sub for smaller gigs as it moves that much air.

Inputs and controls on this sub are perfect. Two inputs with full range pass thru. Keep in mind this does not have a built in crossover, so you will have to rely on your full range speakers to output to a sub or use an external crossover. I like the fact that when you power it on, it is ready to go. The default settings (Phase alignment and "EQ") are "off" when you power it on so you don't have to get to the back of it to make any setting changes for use. In my setup, this works perfectly.

The wattage rating on this states 1600w and I believe it. Not sure what the RMS on this unit is, but having to guess it is around 800-1000w. After break in, it was louder than I could stand and still did not light up the Clip/Limit light. I'm sure you can overload it, but it gets really loud and clean low end all the way to at least 40hz where I run a low cut. The specs seem pretty accurate as far as power and freq range.

The handles are recessed and does not use any hardware. This is perfect for me as it makes a "clean" side with nothing protruding out as well as making it easier to grab from any angle. The input and controls are recessed as well to minimize the risk of damage when loading/unloading.

The finish is the modern kind of spackle/splatter type. Not smooth, but not rough either. It should accept some dings and scratches well. I haven't really used it much at this point, so I can't speak to how "pretty" it will stay over time.

My setup has a Mackie Mix8 and the Behringer Super-X Pro CX3400 V2 (this sub does not have a built in crossover). I'm sending
Packs a punch!!!
Do not underestimate its size these bad boys pack a hell of a punch for a 15". So far I've did to party's and let's say I've gotten compliments all night I've paired these with my 2 Qsc K10.2 Tops and they sound great. I'm looking to pair these two subs with the Alto Ts412's in the near future and for the price you won't be disappointed!!!
Music background: DJ/Producer