Alto TS18S | 2500W 18 in

ALTO TS18S  (Alto TS-18S)

High-Powered 18-Inch Subwoofer for Deep, Controlled Bass in Live Sound

The Alto TS18S is the most powerful subwoofer in Alto’s lineup, delivering a thunderous 2500 watts of peak power through an 18” driver with a 3” high-temp voice coil. Built for mobile DJs, live performers, and fixed installations, the TS18S adds exceptional low-end clarity and punch to any PA system, ensuring a full-frequency listening experience across all performance spaces.

Alto TS18S Competitive Differences

• 2500W peak Class D amplification for consistent, high-output performance
• 18” woofer with 3” voice coil for extended low-end response and high SPL handling
• Frequency response: 35 Hz – 100 Hz (-3 dB), extended range down to 27 Hz (-10 dB)
• Max SPL: 137 dB for deep, clean bass at high volumes
• Selectable DSP EQ presets: Off, Live, DJ for application-based tuning
• Phase alignment selector: 0°, 90°, 180°, 270°
• Durable, internally-braced MDF cabinet with mark-resistant splatter-spray finish
• Built-in 36 mm pole socket and caster insert support
• Advanced protection circuitry: clip, thermal, and overdrive protection

Alto TS18S Description

Designed to deliver a commanding low-end experience, the Alto TS18S sets a new standard in powered subwoofer performance. Its massive 18-inch woofer reproduces sub-bass with authority, while advanced DSP controls give users the flexibility to tailor the output to suit a variety of environments—from packed clubs and concert halls to worship venues and event spaces. This subwoofer is engineered with a front-ported, internally braced MDF cabinet to ensure accurate bass reproduction with minimal cabinet resonance. With its DSP-tunable EQ modes (Off, Live, DJ) and multi-position phase selector, the TS18S is easily integrated into any professional sound system—whether used alone or in multiples. Built for gigging professionals, the TS18S offers a mark-resistant finish, robust structural design, and a high SPL output that doesn't sacrifice clarity. Whether it’s thumping club beats or the foundation of a live rock mix, this sub delivers.

Alto TS18S Features

• 2500W peak output via Class D amplifier
• 18” woofer with 3” high-temperature voice coil for tight low-end
• Frequency response: 35 Hz – 100 Hz (-3 dB)
• Extended frequency range down to 27 Hz (-10 dB)
• Maximum SPL: 137 dB @ 1m
• 3 DSP EQ tunings: Off, Live, DJ
• Phase switch: 0°, 90°, 180°, 270°
• 2 x XLR/1/4” combo inputs; 2 x XLR thru outputs
• Volume control with LED indicators for signal/clip
• Internally-braced MDF enclosure with 36 mm pole socket
• Caster insert thread: M6 x 1.00 mm
• IEC power connection with universal voltage (100–240V)
• Electronic protections: clip, thermal, and transducer overdrive

Alto TS18S Specifications

• Output Power: 2500W peak @ 4Ω
• Woofer: 18” (457 mm), 3” (76.2 mm) voice coil
• Frequency Response (-3 dB): 35 Hz – 100 Hz
• Frequency Range (-10 dB): 27 Hz – 111 Hz
• Maximum SPL: 137 dB
• Inputs: 2 x XLR+1/4” combo
• Outputs: 2 x XLR thru
• Power Connection: IEC cable input
• Voltage: 100–120V / 220–240V AC, 50/60 Hz
• Power Consumption: 1600W
• Fuse: T15AL (120V), T8AL (240V)
• Cabinet: Internally-braced MDF, mark-resistant finish
• Dimensions (H x W x D): 26.7” x 20.9” x 24.7” (678.2 x 530.9 x 627.4 mm)
• Weight: 93 lbs (42.2 kg)

Experience foundation-shaking bass and industry-leading reliability with the Alto TS18S—your new subwoofer workhorse for every professional sound setup.