Alto TS218S 18" Truesonic Active Subwoofer

✓ 1 Year Warranty included

✓ Authorised UK Dealer

✓ FREE 2 - 3 Working Day Delivery


Higher performance, amazing sound quality, flexible connection options, easy transportability and unparalleled value - you’ll find it all in the Alto Professional TS218S Active Subwoofer.

Alto Professional

contact us 020 8813 7666

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Product Description


For those performance situations where additional low-frequency output and punch are required; even beyond the already-impressive bass capability of the TS2 full-range speakers; the new TS2 powered subwoofers are the perfect solution

Pair TS218S with any full-range speaker system to extend the bass response and dramatically enhance the overall impact of the music being played.

  • 1250 watts of peak power output
  • Custom engineered high-efficiency Class D amplifiers with passive cooling design – no fan means the speaker runs cleaner, quieter and has greater long-term reliability
  • 18-inch high-excursion woofer
  • (2) XLR+1/4-inch combo inputs + (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 and M10 rigging points




-Output Power: 1250 W peak, 625 W continuous
-Transducer Low: 15” (381 mm) woofer, 3” (76 mm) voice coil
-Frequency Response: 35–95 Hz (-10 dB)
-Maximum SPL: 129 dB (@ 1 m)
-Connections: (2) XLR+1/4” (6.35 mm) inputs; (2) XLR outputs; (1) IEC power cable input
-Input Level: Line +4 dBu (nominal)
-External Controls: Volume control, signal/clip limiter with LED, polarity-reverse switch, high-pass filter bypass switch with LED, extended low-frequency switch with LED, power switch with LED
-Electronic Protections: Electronic clip, thermal and transducer overdrive protection
-Enclosure: Internally braced plywood 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: 450W
-Fuse: T6.3AL AC250V (110–120 V) or T3.15AL AC250V (220–240 V)
-Dimensions (W x D x H): 21.34” x 20.3” x 24.8” / 542 x 515 x 630 mm
-Weight: 62 lbs. / 28.2 kg

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