Alto Professional TS18S | 2500W 18-Inch Active Professional Subwoofer
Maximum authority. Thunderous bass. The TS18S is built on years of acoustic expertise to deliver a serious punch that brings any performance to life. Featuring a premium 18-inch transducer with a 3-inch high-temperature voice coil, it produces deep, impactful low-frequency reproduction down to 27Hz. With a peak SPL of 133dB, it has the power to fill concert halls and large nightclubs with ease. The cabinet is constructed from internally braced, front-ported MDF and finished in a mark-resistant splatter-spray coating, ensuring that every watt of power is converted into tight, controlled bass rather than cabinet resonance.
Why Choose the Alto Professional TS18S?
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Alto's Most Powerful Subwoofer: A massive 2500W Class-D amplifier provides incredible headroom for deep, impactful low-end.
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18-Inch High-Performance Driver: Built to handle the rigours of high-volume live performance with a 3-inch high-temperature voice coil.
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Advanced Phase Alignment: Features a multi-position selector (0°, 90°, 180°, 270°) to ensure perfect integration and time-alignment with any full-range speaker.
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User-Selectable EQ Tunings: Quickly adapt to your environment with "Live," "DJ," and "Off" presets to boost or bypass low-end accentuation.
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Front-Ported MDF Cabinet: The internally braced MDF construction provides a much tighter and more "musical" response than standard plastic enclosures.
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Professional Connectivity: Dual XLR+1/4” combo inputs, dual balanced XLR line outputs, and dual XLR "thru" outputs for limitless system linking.
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Comprehensive Protection: Integrated electronic clip, thermal, and transducer overdrive protection for total reliability night after night.
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Integrated 36mm Pole Socket: A heavy-duty socket on the top allows for secure mounting of TS412 or TS415 speakers directly above the sub.
Professional Engineering and System Control
The Foundation of Your Sound The TS18S is designed to offload the heavy lifting from your top speakers. By handling the frequencies below 100Hz with 2500W of dedicated power, the TS18S allows your full-range PA to play louder and clearer. The front-ported design ensures that the bass is projected forward into the audience, maximizing the physical "thump" on the dance floor.
Seamless Precision Integration Unlike many subwoofers that offer a simple 0/180 degree phase switch, the TS18S offers four phase alignment settings. This allows for surgical precision when aligning the subwoofer with your top speakers, ensuring that the waves from both units reach the audience at the exact same time, eliminating bass "nulls" and maximizing impact.
Technical Specifications
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Amplifier: 2500W Peak / 1250W Continuous (Class D)
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Max SPL (@ 1m): 133 dB
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Transducer: 18-inch driver with 3-inch (76mm) high-temperature voice coil
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Frequency Response (-3 dB): 35 Hz – 100 Hz
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Frequency Range (-10 dB): 27 Hz – 111 Hz
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Inputs: 2 x XLR/TRS Combo
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Outputs: 2 x XLR Line, 2 x XLR Thru
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Phase Alignment: 0°, 90°, 180°, 270° (Selectable)
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Enclosure: Internally braced MDF with 36mm pole socket
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Weight: 42.2 kg (93.0 lbs)
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Dimensions: 678 x 531 x 627 mm
Frequently Asked Questions
How does the "Thru" output differ from the "Line" output? The "Thru" outputs send the full-range signal exactly as it came in, which is ideal for daisy-chaining multiple subwoofers. The "Line" outputs are processed, sending the high-pass signal to your top speakers to ensure they aren't working too hard on the bass.
Is this subwoofer difficult to move? At 42.2 kg, the TS18S is a substantial unit. It features recessed ergonomic handles for a two-person lift and is designed with a footprint that is compatible with most standard heavy-duty wheel boards for easier transport.
Can I use this with speakers from other brands? Absolutely. While optimized for the Alto TS4 series, the adjustable EQ and 4-position Phase Alignment make the TS18S an excellent choice as a high-power bass foundation for any professional PA system.
What is In The Box?
Why Buy From djkit?
At djkit, we recommend the Alto TS18S for performers who need "no-compromise" bass performance. This is the heavy-hitter of the range, built to handle the biggest rooms and the most demanding crowds. With our fast UK delivery and expert support, we help you build a sound system that delivers the power and reliability required for a world-class show.
