great deep rumbling base in a large room

I'm Blown away by the build quality and volume this sub is able to output. Don't hesitate, just buy it!

Good morning. I haven't fired my monolith 15s up yet but I will say, that I was very impressed with the packaging and handling: speakers were well insulated, and double boxed. I usually order things and the boxes are in horrible shape when they get to me. The two monolith 15's that I ordered were in excellent shape, inside and out. They are massive and beautiful to my eyes. I will update you guys once I get everything situated, connected, and fired up.

Absolutely a beast! These can energize a room like nothing I've owned before!

Truly an incredible addition. Totally gives you an immersive experience. Great value with great performance

Great sounding subwoofer

First off, this sub is massive. It arrived double boxed with thick foam packaging, and then wrapped in cloth. While the outer box had seen some abuse during transit, the inner box and the speaker itself was pristine. This is my second monolith sub. I also have the monolith M-10 in my living room HT setup, since I didn't have the space in that room for a larger sub. The 10" is very impressive and punches well above its weight. The 15" monolith is in my basement and it literally shakes my entire house. I'm using this mainly for music with a pair of stereo speakers and it provides massive amounts of deep loud bass even in a huge open room. It's like being in a club, only the sound quality is better. It likes to play loud, and that's when you can really appreciate this sub. If you don't/can't play it loud, then consider getting one of the smaller subs, which are impressive in their own right, especially for the price.

I've been designing, installing, and building home theaters for over 20 years, I really like this subwoofer. This thing has excellent headroom, and produces a tightly controlled bass even way down deep. The foam port adjustments help tune your bass to fit the acoustics of your room and preference.
Warning: ITS BIG.

This is a reference sub. I have a large living room with tall ceilings with an odd shape. It?s been hard for me to find a sub that would fill the space. First had a rep 15 ht predator which didn?t come close cause of the sealed design. Then a SVS pb3000 which was pretty good but I had to push it as hard as it would go. But the m15v2 digs deeper and fills the whole space no matter where you?re sitting. In parts of Godzilla king of the monsters I swear I was make the sub over extend so I went and checked and it was maybe 3/4? excursion at most and had a lot more to go. I love SVS and the 16 ultra model might be hair better but it?s more than twice as much. I?ve spent a lot of money trying out the best subs around and this is the best, especially for the money.
FYI settings I have are no crossover, thx level gain setting, thx eq (non extended).
Also make sure to give this a week or two break in period. Big difference from the first day.

Changed the whole sound of a Dolby Atmos home theater. Have definitive BP-9060 fronts and Definitive CS-9080 center, all with built-in subs. This hits lower and crisper making the sound so much richer and fuller. Even the wife was impressed. The downside is that it?s huge.