A bit underwhelming. Not that much of a KICKER.

very cool piece ot tech does what is was designed to do

This product was impressive and really put some rumble out, unfortunately the unit I received as defective and it sounded like a rattling tin can. I sent it back and got a refund pretty quick, I am thinking about trying another. UPDATE: I went ahead and bought another one and it sounded great. So I bought even another one. If your looking for extreme rumbling power than look elsewhere but if you are looking for a low price and modest output than you should go this route. I love mine, I use them 2-3 times a week for a movie or movie series and for the last 5 months theyve worked great. Great to pair with a subwoofer.

I review things after I've had the product for some time. I encourage others to do the same. I believe It's more fair to the buyer. My initial thoughts were these were going to be to intense (to efficient perhaps?) and not functional for my needs. I purchased three units for my home theater system. One had a manufacturing defect but they got it promptly replaced. I wanted them to be an extension to my system, not a distraction. You know an amp that is over rated and under driven is the best approach for getting good and reliable sound out of a speaker. However, these are not speakers. And I needed to make myself believe they would handle and feel like they are. Not a distraction but a sense that it's my sub-woofer that is doing the shaking. This is no easy task for making it an extension of my sub woofer. My sub is quite adequate in producing the low notes, but I have a harder time with feeling the results in a large room. So I either shake my neighbors out of their house with my sub or try these little transducers in my seats. I had a hard time tuning them, but after using some sub filters and a very low volume, they have created that extension to my sub feel that I was looking for. During light music they are not producing anything, they would be a complete distraction. But when I want to listen to techno or an action movie, they come to life and are set at a subtle level I can handle. If you are wishing to do the same, then you might need an external source to filter the unwanted frequencies and tune the output to the right levels for your system. If you just want them to be a butt kicker for a cheap car stereo (and for a cheap massage) (smiles) you can get that too without the attention to correct tuning if you like it that intense.