Delivery Information

Collection only due to the size and weight of the TS318S subwoofers. Please check current stock availability by calling 01483 502121.

Alto Professional TS318S 2000-WATT 18" Powered Subwoofer

We are currently out of stock, please contact us on 01483 502 121 for the latest stock availability.

24 monthly payments of
£30.24 EACH / £60.44 PAIR
N.B. Finance example prices include 10% deposit. Find out more.

If you want to add some serious low frequency power to your sound system then the Alto Professional TS318S has been designer for you. This subwoofer extends the bass response of virtually any fullrange speaker, relieving that speaker of the difficult task of having to reproduce the low bass frequencies. The result? A system with stunning wide-range response characterised by dramatic, impactful low frequencies and effortless, undistorted mids and highs. The listening audience will hear everything with perfect clarity, from the lowest bass synth tones to the highest percussion bells and everything in between.

All TS300-series subwoofers have a choice of six selectable DSP output modes so the subwoofer’s frequency response and crossover frequency are perfectly-matched to the speaker it’s being used with. Four of these six output options match the subwoofer perfectly with Alto TS2 and TS3 full-range speakers, while the other two output options ensure a perfect match even if you are using non-Alto full-range speakers.


  • Driver: 18-inch with high-temperature, long-throw voice coil
  • Amplifier: 1000W continuous, 2000W peak Class D power
  • XLR outputs, with six discreet output modes for ideal matching with companion speaker
  • Extended LF switch for increased EQ control
  • Electronic clip, thermal and transducer overdrive protection
  • Integrated 35mm pole socket
  • M10 suspension points
  • Rugged, mar-resistant splatter-spray finish always looks good, even with heavy use
  • Designed and tuned in the USA


  • Output Power: 2000 W peak, 1000 W continuous
  • Transducer Low: 18” (457 mm) woofer
  • Frequency Response: 37–97 Hz (-10 dB)
  • Maximum SPL: 133 dB (@ 1 m)
  • Connections: (2) XLR+1/4” (6.35 mm) inputs; (2) XLR outputs; (1) IEC power cable input
  • External Controls: Volume control, signal/clip limiter with LED, DSP output mode switch with LED, polarity-reverse switch, extended low-frequency switch with LED, power switch with LED
  • Electronic Protections: Electronic clip, thermal and transducer overdrive protection
  • Enclosure: Internally braced MDF cabinet; 35 mm mounting pole socket ontop panel
  • Power Connection: Standard IEC cable
  • Input Voltage: 110–120, 220–240 V AC; 50/60 Hz
  • Consumption: 1000W
  • Fuse: T10AL AC250V (110–120 V) or T5AL AC250V (220–240 V)
  • Dimensions (W x D x H): 26.8” x 21” x 24.7” / 680 x 533 x 628 mm
  • Weight: 86.4 lbs. / 39.2 kg



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