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Alto TS218S 18" Powered Subwoofer

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For those performance situations where additional low-frequency output and punch are required, even beyond the already-impressive bass capability of ...Click To Read More About This Product

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See All Alto Powered Stage Subwoofers
Don't Forget

1,250-watt 18" active subwoofer.

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 TS2 powered subwoofers are the perfect solution. Pair the 18" TS218S Subwoofer 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
18 in. high-excursion woofer
Two XLR/TRS combo inputs, Two 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

Serious low-end support for the TS2 range of speakers and more!


Review Snapshot

by PowerReviews
AltoTS218S 18" Powered Subwoofer

(based on 3 reviews)

Ratings Distribution

  • 5 Stars



  • 4 Stars



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  • 1 Stars




of respondents would recommend this to a friend.

Reviewed by 3 customers

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(1 of 1 customers found this review helpful)


Prior model (Alto 18" TSSUB18) failed after 3 years :(

By Troy

from Appleton WI

About Me Experienced

Verified Reviewer


  • Clear Sound
  • Easy To Use


  • Breaks Easily
  • Bulky/Heavy
  • Unreliable

Best Uses

  • Mobile DJ
  • Performances

Comments about Alto TS218S 18" Powered Subwoofer:

Sounded clear and loud when it worked, but after only 3 years of barely using it in my mancave it only works intermittently now. I take great care of my stuff, very particular about that sort of thing and never pushed it too hard. Just outside 3 year warranty so Alto won't help of course, they want $300+ to ship a replacement amp and will not even offer a year warranty with the new amp or even a 30 day return on it in case it isn't the amp (lol unreal, very disappointing customer service). Why would I buy the exact same thing with no assurances or peace of mind at all it won't simply happen again? I took it apart and verified the driver was fine so am almost certain it's electrical failure. I'm just out the $$$ it looks like. I usually have good luck so I guess I was due for something like this. For that kind of price and no guarantees, I will just pay more and go with a different brand. I would caution against this brand and certainly won't buy again.

(1 of 1 customers found this review helpful)



By burt

from South Africa

Comments about Alto TS218S 18" Powered Subwoofer:

I was not exactly blown away by the power - I bought them knowing they push 131(Max SPL) - Not monstrous bass but it's decent for the price range - I think it's a good start up bin

They also clip way too easily, So it's just a bit frustrating to constantly monitor the back of the Bin to see if it's clipping:(


Love this product

By Pac

from New york


  • Cheap


    Best Uses

      Comments about Alto TS218S 18" Powered Subwoofer:

      I picked up one of these to see what my alto ts115a speakers were missing and wow it made a difference, enough so that I bought a second one. I would recommend this speaker to anyone looking to get some extra base, crank it to 2/3 on the back and watch just how loud it can get

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