Alto Professional TS18S Subwoofer

Alto Professional TS18S Active Subwoofer

Alto Professional TS18S is the flagship of the "TrueSonic" series, designed for large spaces, nightclubs, and live concerts where the highest possible low-frequency pressure is required. This model features a massive 18-inch (457 mm) speaker with a 3-inch voice coil, powered by an extremely powerful Class D amplifier, reaching 2500 W (Peak) power. This allows it to generate up to 137 dB of sound pressure and reproduce low frequencies from 29 Hz.

The TS18S offers professional sound tuning functions, allowing it to be ideally integrated into any system. Users can choose from three EQ settings ("Off", "Live", "DJ") and use an advanced 4-position phase alignment switch (0°/90°/180°/270°), which is particularly important when matching low frequencies with main speakers in acoustically challenging rooms.

The cabinet is made of thick, internally reinforced MDF composite, which ensures a strong, "tight" sound without unnecessary cabinet resonances. The surface is covered with a special, abrasion-resistant "mark-resistant splatter-spray" finish. The back of the speaker has provisions for mounting casters (M6 threads, casters sold separately) for easier transport.

Key Features

• Power: 2500 W Peak powerful Class D amplifier.
• Speaker: 18-inch (457 mm) woofer with a 3-inch voice coil.
• EQ settings: 3 modes ("Off" - flat, "Live" - concert, "DJ" - enhanced).
• Phase control: 4-position switch (0°/90°/180°/270°) for precise phase alignment.
• Construction: Internally reinforced MDF cabinet with a 36 mm pole mount socket.
• Protection: Electronic protection against overload (clip), overheating, and speaker over-excursion.

Technical Specifications

• Manufacturer: Alto Professional
• Model: TS18S
• Type: Active Subwoofer
• Output Power: 2500 W Peak @ 4Ω
• LF Driver: 18.0” (457 mm) with 3.0” (76.2 mm) high-temperature voice coil
• Frequency Response: 29 Hz – 100 Hz (-3 dB)
• Frequency Range: 27 Hz – 111 Hz (-10 dB)
• Max SPL: 137 dB (@1m)
• Connectors:
  • 2 x XLR / 1/4” (6.35 mm) Combo Inputs (female)
  • 2 x XLR Thru Outputs (male) (for signal pass-through)
  • 1 x IEC power socket
• Dimensions: 678.2 x 530.9 x 627.4 mm
• Weight: 42.2 kg
• Casters: Ready for mounting (M6 x 1.0 mm threads, casters not included)

What's in the box?

• 1 x ALTO TS18S Subwoofer
• 1 x IEC Power Cable
• 1 x Registration Card
• 1 x User Guide
• 1 x Safety and Warranty Instruction

Intended for?

• Large nightclubs and festivals where maximum low-frequency pressure is required.
• Rental companies serving large events.
• Concert halls looking to ensure full, deep sound without compromise.