Using in a 16' x 20' room. This speaker provides excellent deep bass for my home theater system. It is combined with a Klipsch 12" sub running from a Yamaha TSR-7850

Beast of subs . Lots out crazy output. . The 2k watts don't disappoint. I went dual from the start because I have a huge 2 story tv room so lots of area to fill . I'm blow away . The subs are super capable with excursions deep so in other words these speakers move some crazy air

Powerful and clean bass!!! I got two of this babies and I am still impress. The powerful bass moves my seat!

I have two of these subs and they are oustanding and the output is absolutely biblical! I use mine in all the default THX settings with all ports open (receiver is Denon with sub trim set to 0.0dB) in a 17x20 dedicated theater room.

They handle anything I can throw at them with ease without any chuffing or weird mechanical noises. For example, it doesn't even break a sweat during the opening scene (frequency sweep) of "Edge of Tomorrow", it actually scared me a little bit the first time I played it, lol.

One of my favorite movies to watch with these subs is Ford V Ferrari. The bass is so detailed (textured?) you can feel the engines rumble and the cars on the track. It's an aboslute outstanding watch with these subs.

I'm using my subs with Y input cables and haven't had any issues with them being too quiet.

Size wise they are large, but if you get carpet slides on the bottom they are super easy to maneuver and move around so that hasn't been a concern for me.

Now for the one annoying exception. The subs both of them emit a slight pop when coming out of standby and for the price point I don't think they should do this.

To Monoprice's credit, they did RMA new subs for me and the replacements did it as well. What's strange is that they will do that when nothing is connected to them. In this case, I touch the end of the RCA cable to make them come out of standby and they both pop. Pretty dissapointing.

However, for how good the bass is, I can deal with it.

Regarding the RMA process, this is something to be aware of. If you buy these subs you will need to keep all the packaging for the duration of the warranty. Currently Monoprice does not ship parts for these subs. They will RMA the entire sub. However, go to YouTube and from the Channel "Youthman", watch his video titled
"FIRST LOOK at the Monolith 13 THX Ultra Subwoofer - Unboxing & Overview"

The way he unboxes the sub makes unboxing (and reboxing) these subs a breeze.

I'm hoping in the future they'll start shipping parts, but just wanted to add that here.

Hands down, this is the best subwoofer if you are not into building your own subwoofer. The fit and finish is perfect. The packaging was double boxed and came in on a half sized crate. It weighs about 190 lbs. If you need help, there a thread on AVS Forum on how to take this one upstairs effortlessly. Basically, leave it in the box or styrofoam, and using two wood close post hangers or metal sticks, straps, and carry it on your shoulder like people carrying buckets of water in Asian. Minimum 2 people required.

As for the sound, superb, very low, and very clean with lots of headroom. It's a steal when it is 15% off (1823 shipped). It's also OK for sale and regular price for those that can afford it.

I highly recommend this sub. Get 2 of them if you can afford it. It will likely be more than a decade before anything of the same size will beat this subwoofer.

If you want something bigger, you need to head over to the AVS Forum and look at the DIY section.

This thing is a beast. Make sure to measure any stairwells, hallways, door openings, etc. and I highly recommend leaving it on a couple sheets of cardboard if you need to do the sub crawl dance. Or just buy multiple subs, it?s probably easier. Showing this off with 1917 or Tron Legacy makes me giddy. Ask forgiveness not permission.

Incredible packaging for the subwoofer. Down right impressive.

this sub is a monster in every way would recommend if your looking for the king of subs

Beefy, this beast is an earthquake in a box. I've owned tons of subs, from klipsch to SVS. The Mono 16 wipes the floor with them all. Sound fx in Movies hit low and violentlty, kick drums in music attack with ferocity, speedy and accurate. Bass guitars melodic and detailed. If you're searching for that Endgame sub... this is it. Do not hesitate to click that buy button and pull the trigger.

The Bad
1) the noise floor is audible from 2 feet away
2) requires strong pre amp signal, gain must be cranked up
3) the matte black isn't as dark as I'd like
4) it takes about 15 seconds to power on and off
5) it weighs the same as I do

The Good
1) Brutal violent bass
2) Controlled tight bass
3) Detailed musical bass
4) Accurate fast bass
5) Clean non distorted bass

I have always had sealed cabinet subwoofers controlled by a servo in my home system. My background is live sound. Two very different worlds in sound with different characteristics and technologies. I decided to try a ported sub because, well, PA subs are all ported and I like the sound they produce. Perhaps my close mindedness on sealed cabinets wasn't necessary. Well, short version is it's not even close to the same sound so I returned it. However, that's not to say you won't enjoy it. We'll see if my review stays up or not. It's a bit suspect that there are only 13 reviews and you can't buy these anywhere else. You do the math.

Pros: Plenty of power and driver movement. There is no lack of bass with this sub. The driver never once "bottomed out" and the amp never clipped. And I pushed it, a lot. I've heard the phrase "charge the room with bass" but never experienced until this sub. That is 100% what it does. It's not what I like to hear from a sub but it was impressive to experience. Also the low frequency extension is, well, my siding was rattling. The neighbor commented on hearing it and I live in a house. This thing moves air around just as efficiently as I break wind.

Subjective Cons: It sounds boomy and floppy. You don't get to hear the individual frequencies when it is busy producing the entire <20 - 80Hz. Music with a broad range of bass notes just sound like one big sound wave moving around the room. If there is below 30Hz frequencies they take over and distract you from the beauty of the entire mix, even from the main speakers. It's also designed as a home theater sub, so there is some kind of a sub 30Hz boost going on. You don't feel anything above those frequencies, meaning you miss the punch of a kick drum or the smack of a floor tom. Again, my background is live sound so I'm probably pickier than you.

Non-Subjective Cons: Customer service is, well, not great. I wouldn't take this into consideration for a rating but since you can only purchase it through MonoPrice and they also MAKE the thing, it comes into play. Returning it was no easy feat and customer service provided me with little to no information on how to return it. Due to it's size and weight you have to ship it freight, which if you don't regularly use freight, is not an easy (or cheap) task. I emailed customer service asking for an option from them, but it took them over 5 days to reply. Also unboxing it was no easy task. Basically good luck and hopefully you don't destroy the box.