Harmony Audio HA-ML151 Monolith 15" Car Stereo Competition SPL Sub 3200W Dual 1 Ohm Subwoofer

Short and simple, This subwoofer is very similar to the Skar ZVX or the Sundown Zv4 but with a T Frame. 10 inch spider, 300+oz ferrite triple stack. Ive owned this sub for 4 months now. Really beat the crap out of it quite a bit. Its very comfortable at 2k RMS. In a 3.6 cubic ft box tuned at 30hz and it hits that tune with authority. Harmony may be a relatively new company with some questionable stuff in the lower price ranges but the Monolith i can say with confidence is a serious sub that will meet all doubts you have of it by beating the back of your skull with low 140's. And i have the 15. Im plenty sure the 18 inch version would put a grin on your face after kicking your ass.

For the cost, these subwoofers are incredible. Also purchased the HA-A1500.1 to drive this beast. In a ported 5 cube box tuned to 32hz it beats my car apart. I think this speaker can definitely compete with some of the big names in car audio.

It took about 10 hours to break in.This thing bangs!I'm going to build a custom box,going to try a 3.0 cubic ft sealed to have tighter bass..I have it on a Skar 2000.1 now

The media could not be loaded. This ML151 is 57 pounds of loud and low bass. I've got it in a custom box tuned to 32 HZ. I'm still braking this beast in. Honestly I wish it had more peak to peak travel. I've got an old Quantum Audio 3000 watt mono block pushing it. With an XS battery.

update after 3 years ...it hasn't let me down at all.Its the last sub that you'll ever have to buy. Hits the lowest notes and is built like a tank with Pennsylvania steel. Show up your friends instead of showing off how much you spent on a sundown or skar.

This sub is huge plus 2 🤣. These bad boys hit so hard, my truck won't last too much longer 🤷‍♂️

Played it for one day. Voice coil gave out. That's what i got for my MONEY.

The media could not be loaded. No complaints on my end. They bang for sure.