Alto Professional TS18S Powered Subwoofer

Power meets affordability with this Alto Pro sub! The big dog of TrueSonic subwoofers, the TS18S hits hard with 2500 watts peak power behind an 18" driver.

The best performances need the best in sound reinforcement at all ends of the sonic spectrum. For tight, punchy low-end look no further than the Alto Professional TS18S powered subwoofer. When added to your full-range speaker setup, the TS18S subwoofer delivers powerful but controlled low-end presence to your PA configuration for a full and complete listening experience for the modern public music space. With a powered subwoofer, any musical performance will take a giant leap into the realm of tonal balance with the perfect blend of hi, mid, and extended low-end frequencies.

The Most Powerful Subwoofer Yet
Sound reinforcement needs can change from night to night but the best in the business count on reliable power at their disposal whenever it's needed. The TS18S is Alto Professional's most powerful subwoofer yet, packing an incredible 2500 watts of power to make concert halls come alive, night clubs punch and pump, houses of worship lift-up instrumental performances, and more. Thanks to its high efficiency class D amplifier, TS18S adds the necessary heft and weight to any public performance for a balanced representation of musical artistry in any environment.

Carefully Built for Quality Performance
A structure is only as good as its foundation and your sound is no different. The TS18S subwoofer is built with reliable durability in mind to be the anchor of your setup and the anchor of your sound. Built with superior materials, the TS18S is engineered with a premium internally read more braced composite cabinet enclosure for tight, controlled sound. Enjoy all the thump and bump without the unnecessary rumbles and rattles. The key to low-end is clear definition for impactful sonic transmission and a carefully crafted enclosure ensures a truly unbiased sound delivery. With a premium 18-inch driver featuring a 3-inch, voice coil transducer, rest assured, the TS18S subwoofer is built to handle the rigors of live performance whether permanently installed or as part of a traveling setup, night after night.

A Subwoofer for Any Setting
What good is a sub if it doesn't play along nicely with the rest of your speaker setup? The TS18S is designed and engineered to fit into any system thanks to the versatile onboard electronics switches. Quickly bounce through the User-selectable EQ tunings to enable, boost, or bypass low end accentuation appropriately as different shows require. Use the intuitive Phase Alignment function as needed to make sure your tops and subs perform well no matter the setting or setup. With dedicated input and output paths, seamlessly connect your companion Alto Professional full-range loudspeakers or any other standard loudspeaker units.


- High-efficiency Class D amplifier
- Transducer: 18-inch driver with 3-inch high-temperature voice coil
- Rugged and durable construction that's Built to Last
- Internally-braced front-ported MDF cabinet with integrated 36mm pole socket
- Mark-resistant splatter-spray finish always looks good, even with heavy use
- Electronic clip, thermal and transducer overdrive protection
- The Perfect Match for Your Live Sound Setup
- Two XLR & 1/4-inch combo inputs and Two balanced XLR line outputs
- Two XLR thru outputs for linking
- User-selectable EQ tunings (Off, Live, DJ)
- Phase Alignment selector switch (0*/90*/180*/270*)
WARNING: Cancer and Reproductive Harm -
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-Output Power: 2500Wpeak@4 O
-Transducer: Low 18" (457 mm) woofer; 3" (76.2 mm) high-temperature voice coil
-Frequency Response: 29 Hz - 100 Hz (- 3 dB)
-Frequency Range: 27 Hz - 111 Hz (-10 dB)
-Maximum SPL: 137 dB (@ 1 m)
-Connections: Two XLR & 1/4" (6.35 mm) inputs; Two XLR outputs; One IEC power cable input
-External Controls: Volume control, signal/clip limiter with LED, speaker use button, proximity button, power switch with LED
-Electronic Protections: Electronic clip, thermal and transducer overdrive protection
-Enclosure: Internally braced MDF cabinet; 36 mm mounting pole socket on top panel
-Caster Insert Thread Gauge: M6 x 1.00 mm
-Connection: Standard IEC cable
-Input Voltage: 100-120, 50/60 Hz; 220-240 VAC 50/60 Hz Consumption: 1600W
-Fuse: 100-120V, T15AL AC250V; 220-240V, T8AL AC250V
-Dimensions: (height x width x depth) 26.7" x 20.9" x 24.7" / 678.2 x 530.9 x 627.4 mm
-Weight: 93.0 lbs. / 42.2 kg
Dimensions and Weight in Packaging
Base Item
Shipping Weight: 112.5 lbs
Shipping Dimensions: 30 x 29 x 26 in
Manufacturer Part Number (MPN): TS18SXUS

For support or warranty questions, please contact the manufacturer:
Phone: 401-659-8135

Reviewers gave this product an overall rating of 5 out of 5 stars. (4 ratings)
Submitted August 13, 2023 by a customer from

"Great hi-powered sub"

Overall: 5 out of 5 stars
(see rating details)
Verified Customer zZounds has verified that this reviewer made a purchase from us.
I just used a pair of this newest Alto TS18S powered sub at an outdoor party with about 250 guests. I may say at this price point of less than $700, this should be one of the hard hitting subs I had. Terrific low end and didn't clip at all the entire 6 hours of non-stop banging at high volumes. Weight is manageable and easily can fit a pair in a small SUV.
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