These are wonderful powerful subs. I had to install 2 in a ceiling which is not my preferred placement but it had to be off the floor for a dance club / bar. I was mind blown along with 6 Alto TS408’s and a Mackie mixer. I didn’t want to leave after I installed it all it sounded so good. Smooth deep rich bass. Better than my Alto TX12S I use for acoustic gigs.

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Installato in un parco giochi, la sua potenza è imbarazzante! in accoppiata con due diffusori sempre della stessa marca, se collegato tutto come da istruzioni esce un suono potentissimo e molto pulito. Sono molto soddisfatto!

I just dj a wedding with about 244 guests and these subs had that place rocketing!! They are lightweight compared to 18' and they fit in the backseat of a midsize car (Hyundai Elantra). In Alto, I trust!!

I was initially happy with the quality and output of this powered sub, but then after 10 months of occasional use in my climate controlled garage, the amp failed and keeps shorting out, blowing the fuse.Alto agreed to repair it free of charge, but you have to pay to ship the entire sub to them, and that was quoted at $250 just to ship it because it’s so heavy and large.Edit: updated my review because Alto agreed to pay for shipping when I mentioned the cost. Good on them for that, hopefully they can quickly fix or replace it

Very Nice Product

Mencanto lo recomiendo 100% suena muy bien la bocina tiene buen bajeo definitivamente tendré otra muy pronto

This sub sounds good but not good enough for the price in my opinion.

Au top et très puissant

We use these for weddings and events paired with the 10" tops. They are great workhorses and can really take some abuse. I've had them down low on some songs and they do get really low, people really love the extra bass when they are dancing. While they may not be 2500 watts, they don't really need to be. I would love to add two more to our inventory to couple them in pairs.

This 15" sub is amazing! Blew away my alto ts318s clean out the water! Not only is it louder, and deeper, it throws the bass much further out. Top it off its almost half the price! I can only imagine how good the 18" is! Already have a 2nd 15" on the way! P.s., this thing is even heavier than the ts318s, and thats cuz its smaller!!!*UPDATE*I purchased 1 more, and WOW!when they're stacked or sitting directly side by side and touching, its ridiculously loud! The bass is too dang good! Very impressed. I've tried EV subs, mackie thump subs, RCF subs, and these stole the show!*FINAL UPDATE 12/16/23*Just did my first Christmas party of the year, and man o man did this sub bring the boom!It was a smaller venue for about 120 people so I only used 1 sub instead of the pair as I did not want to overwhelm the audience with bass. Even then I had to adjust the bass down every now and then via my mixer, since some songs hit harder than others. From country, rock, reggaeton, Tejano and hip-hop/rap, this thing filled the venue to perfection. I did a sweet 16 a month ago in a venue 3 times the size, I used both 15"s for this event, and you could feel the lows in your chest even at the back of the room almost 50 yards away! Best investment for my DJ services by far! Most people love that concert feel of having a live band and a strong kick drum response, that's what these subs can do! With my 15" EV PA's in true stereo mode (L & R channels separated) you get that concert experience from almost any song! Hell of a job Alto!