Alto Professional TS18S Active Subwoofer

Alto Professional TS18S Active Subwoofer

Alto Professional TS18S is an active subwoofer with an 18-inch driver. Its built-in Class D amplifier delivers 2500 W of peak output power.

The TS18S extends the low-frequency output of full-range loudspeaker systems. It can be used for live music, DJ performances and permanent sound reinforcement in clubs and concert halls.

Three EQ settings adjust the low-frequency response. Off provides a flat response, Live emphasizes the 60–80 Hz region for kick drum and bass guitar, and DJ adds low-frequency emphasis. Phase alignment helps reduce low-frequency cancellation when combining the subwoofer with other loudspeakers.

Two combo inputs accept XLR or 6.35 mm TS and TRS connectors. Two XLR Thru outputs pass each input signal onward. A separate volume control adjusts the subwoofer level, while the Signal/Limit indicator shows signal presence and protection activity.

The internally braced MDF cabinet has front ports and a mark-resistant finish. A 36 mm pole socket is fitted on top, and threaded inserts on the rear accept optional transport casters.

Main Features

• The built-in Class D amplifier removes the need for a separate power amplifier.
• An 18-inch driver adds low-frequency output to the main loudspeaker system.
• Off, Live and DJ EQ modes provide a choice of low-frequency emphasis.
• Four phase settings help align the TS18S with the main loudspeakers.
• Combo inputs accommodate XLR and 6.35 mm signal cables.
• Two XLR Thru outputs pass the input signals to other loudspeakers.
• The Signal/Limit indicator helps monitor signal presence and active protection.
• A 36 mm pole socket and caster inserts provide mounting and transport options.

Technical Specifications

• Type: active subwoofer
• Amplifier: Class D
• Peak output power: 2500 W at 4 Ω
• Driver: 18-inch (457 mm) woofer with a 3-inch (76.2 mm) high-temperature voice coil
• Frequency response: 35–100 Hz (−3 dB)
• Frequency range: 27–111 Hz (−10 dB)
• Maximum SPL: 137 dB at 1 m
• Inputs: 2 XLR / 6.35 mm TS or TRS combo inputs
• Outputs: 2 XLR Thru outputs
• EQ modes: Off, Live, DJ
• Phase settings: 0°, 90°, 180°, 270°
• Controls: volume control, EQ and phase buttons, power switch; Signal/Limit indicator
• Protection: electronic clip, thermal and transducer overdrive protection
• Cabinet: internally braced, front-ported MDF with a mark-resistant finish
• Pole socket: 36 mm, on the top panel
• Caster mounting: M6 × 1.0 mm threaded inserts on the rear
• Power supply: 100–120 V or 220–240 V AC, 50/60 Hz; IEC inlet
• Power consumption: 1600 W
• Fuse: 100–120 V: T15AL AC250V; 220–240 V: T8AL AC250V
• Dimensions (H × W × D): 678.2 × 530.9 × 627.4 mm
• Weight: 42.2 kg

What’s Included

• 1 x Alto Professional TS18S Active Subwoofer
• IEC power cable

Casters, a loudspeaker pole and signal cables are not included.

Who Is It For

For live music, DJ performances and sound reinforcement in clubs or concert halls where a full-range loudspeaker system needs additional low-frequency output. Suitable for mobile setups and permanent installations.

Can’t find the Alto Professional product you are looking for?

Contact us: info@stageiq.lt or +370 636 55536.