Alto Truesonic TS218S Powered Subwoofer - 18 Inch - Ex Display

Product ID: 112609

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  • Powerful subwoofer with 625 watts of continuous power output
  • Custom engineered high-efficiency Class D amplifiers with passive cooling design
  • 18-inch high-excursion woofer delivers precision bottom end
  • 2 XLR+1/4-inch combo inputs and 2 balanced XLR line outputs
  • Polarity Reverse, Full-Range Output and Extended LF controls
  • Electronic clip, thermal and transducer overdrive protection
  • Rugged, internally-braced front-ported plywood cabinet
  • Integrated 35mm speaker pole socket for mounting speakers


The Alto Truesonic TS218S Powered Subwoofer is the heavyweight of the TS sub series. Capable of delivering thunderous lows thanks to the 18" driver this meaty yet compact active subwoofer will breathe amazing energy into your performances. For best results, we suggest pairing with an Alto full range speaker, however, the TS218S will work with any powered speaker with a relevant power rating.

Solid low end power

Packed with 625 watts of continuous class D amplification, the Alto Truesonic TS218S Powered Subwoofer delivers massive bottom end when you need it most. Giving you a substantial amount of power over lower frequencies gives you more depth to mix with and the TS218S delivers this effectively, economically and remains a very popular choice for sound engineers and bands all over the world.

The frequency range and crossover of the Truesonic TS218S has been tuned to provide smooth, low-end sound production in the 35Hz-95Hz range. The Truesonic TS218S powered subwoofer also offers dual XLR/TRS combo inputs, an internal active crossover, and is housed in rugged, compact, internally-braced front-ported plywood cabinet with durable metal recessed handles making it as solid as a rock, yet completely portable.

Simple Controls

For total control over your sound, the Truesonic TS218S comes with built-in level and polarity controls, extended low-pass filter switching and a limiter with a red LED indicator to identify when your input is too hot.

The party piece of the Truesonic TS218S is the powerful 18" woofer with 3" voice coil and double ventilation. This enables the Truesonic TS218S to dish out as much precise, pure power as you need. The amp, crossover and driver all work in harmony to give you earth shattering bass combined with clarity, all in one easy to transport, solid unit.

ModelTS218S Powered Subwoofer
Dimensions (W x D x H)26.8” x 20.7” x 24.8” / 680 x 525 x 630 mm
Weight70 lbs. / 32 kg
Frequency Response35–95 Hz
Active / PassiveActive
Wattage1250 W peak, 625 W continuous

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