Great product and good looking, would buy again. Infiinty a good way to go.

I had one Kicker CVT10 2 Ohm speaker for a year, it was a good subwoofer, generally i liked it. Until my box rattled and it was too small for the sub and it was bouncing because of the screws. I went ahead and built another box and put in two of these subs in. What a difference, they don't hit much harder because the same amp is being used - a 400 watt rms kicker mono amp. They are much better sound quality wise, they are so much cleaner it is amazing. They also hit lows the Kicker never responded to. The difference is clear. For ten dollars per sub more, these subs are superior to the kicker.

Purchased the Kappa 100.9 for a project vehicle I have one installed and tested Not running a lot of power yet this sub for its smaller size sounds GREAT Cant go wrong with this one

Powering a pair of these with a Kappa 4 in bridged mode. Used the Infinity specs to build a ported enclosure and it turned out perfectly. Loud, crisp, clear - everything I was shooting for. Had to remove the back seat in a extended cab GMC to make room for the enclosure, but well worth it. The drive to and from work is now an awesome experience that I look forward to each day. I am just wowed with how the system turned out. Accurate reproduction is what these subs are all about. Probably not suited for rap thumping, but for my classic rock line-up -- couldn't be happier!

I have a pair of these installed IB in the rear deck of my Altima. They are awesome, they have a lot of output, and are not as musical as some subs I have had IB in the past, but they play well down low which is what I got them for. I would certainly recommend these to someone who is going IB and in a box they will do just as well. The selectable smart impedance is awesome. It really gives you great flexibility with amplifier selection.

Great item, sound is excellent , best item I brought, the value is ok.

For a single 10", this sub hits hard. It looks even better. Hookup is flexible with the 2ohm switch. Makes wiring that much easier. Just what I needed to add clear bass to my system without annoying everyone else around me.

I got two of the kappa 100.9 in my Infiniti G37 and it rocks really hard. They are powered by an infinity kappa one which really delivered an awesome sound. I also have a kappa four for my kappas 6x9 and 6-1/2" components which is really awesome. Would recommend any time.

Very nice quality subwoofer, at an affordable price. Build quality better than Kicker yes. I have always used Kicker subwoofers, and this time I just wanted one small 10" driver. I chose to give this Infinity Kappa 10" a shot. Just got it hooked up today, and I was blown away with it's sound reproduction and output for such a small driver. I have it in a 1.0cu ft sealed enclosure. Hits accurate, deep and tight. I have about 600rms going to it. You wont find a better sub for the price period.

We have 3 of these puppies in our trunk and they realy kick, powered by a hifonics 1000.1d Amp @ 2 ohms. We had a reading at 132.2 db. Stoked! With the mew shipment of Vibe black AIR 6" component & Vibe 6 x 9 (Black Air) she should be pumping!!!! THANX SONIC!

A frind of mine has three of these in his honda civic in series and wow is all i can say. Hurry and buy now beacause these actually compare to sum of the higher end kickers ect.
Pros: they look awesome and they hitt so hard with great lows. Cons: none

My title says it all. all the lows i need, good looking design, really really beatifull sound. The switch on the side makes it easy to hook up. thats a plus...

A close friend of mine just picked two if these up for his Scion tC and I have to be honest I have never heard such a good sounding sub. Definitely not the loudest but if youre looking to make music sound how it was intended to, these subs are for you!

Just copped 2 of these in my 05 impreza, these are the best subs I've ever owned, they aint the loudest but most def crisp as hell. Should be charging 200 a sub. I got these hooked up to a 1000 watt kenwood set at 2ohms, and they pull the s*** out this amp. Lookin to upgrade the amp but it does fine for now. Great buy, recomend to anyone.

This is a great sub. I have an MTX formed enclosure for my 1994 Z-28 and the 10" that was in it just wasn't producing the lows I expected. I replaced it with the Kappa 100.9. It fit perfectly and now the lows are much more noticeable. The construction is very solid, and matched with Kappa speakers in front and read, powered by an Infinity 5 channel amp, the sound is great. The 2/4 ohm switch makes it an easy fit for any system.

This sub is very, very nice.. Nice clean bass, very solid build quality. I was immediately impressed by the quality of the product as soon as I took it out of the box. It also weighs almost 20 pounds.

The sound that can come out of this thing is crazy. My friend didn't believe that it was a 10 when he heard it because it hits harder and cleaner than his 12. Definitely buy a quality amp for this. I was using a 380W rms Pioneer amp for a week until I got one more suited for this sub; a 300W rms Polk monoblock. With the Polk amp running the juice for this sub I could not be happier.

At 160 bucks, this is a great buy that no one would be disappointed with. The the genius who said his subs were making crunching noises after a week, you blew your subs.. don't give low ratings because you don't understand the difference between rms and peak power. This sub is solid.

I wasn't looking for mirror shaking bass I just wanted good tight accurate bass and this sub delivered. Great sound at a great price. Couldn't ask for more.

these thangs can get it, believe me, and they are some of the best looking cones ive EVER seen. it sounds just so good, and moves a nice amount of air. a def. 15/10.