ABSOLUTELY EVERYTHING!!!!!!!!!!!!!!! VERY loud and VERY deep the cone is also the strongest in the subwoofer industry hits EXTREMELY hard... (to the guy who wrote two reviews in a row below: there MUST be somethign wrong with your setup you may be underpowering it they require 500-1000+ per subwoofer.. i work in a car audio shop these are the one of the BEST subwoofers in the market today for their SQ, SPL and price.. they can be easily found for under $200 a 12 online and another plus is they require a very small sealed box of .88 cu feet

NONE besides the fact you needs lots of power more than that are rated at to make them sound really good 500+ watts

EXTREMELY LOUD TIGHT DEEP BASS!!!!!!!!!!!!!!!!!! I have 2 12" MOMO's powered by 2 RF POWER BD1000a2's and a 2 farad cap and it SLAMS HARD in my 96' Mazda 626, harder than ANYTHING that I've listened to a lot with a wide range of music or owned like the list above with the exception of the eclipses.... trust me you can't go wrong with these things if you LOVE SQ and want a VERY VERY LOUD sub and have the power to push these... (500-1000 per sub)and only want to spend around $200 per sub for something truly amazing then these are for YOU... DONT listen to the guy who has posted below me twice he is WRONG i can tell you that I'm 27 years old I've had a system in my car since I was 20 and have been in the business(my own car audio store - A Sound Choice in Melbourne, FL) ever since I KNOW what I'm talking about these subs are.... UNBELIEVABLE!!!!!!!!!!! I've listed to pretty much every name brand sub on the market in all the sizes and enclosures with many different installs.. take my word for it.. or listen to that other guy.. HAHA what a joke that was!!!!!!!!

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3 JL W6 12"(not as loud as 2 momos), 3 Infinity Perfect 12"(were much louder than the momo's and sq was amazing Infinity makes a very good subwoofer), 2 RF punch 12", 2 RF XLC 12", 2 Kicker COMP VR 12", 2 Kicker Solobarics 12"(good SPL not as good SQ as the momos), 3 MTX 6000 10", 3 Eclipse 8810 DVC 10" <--- higher price much higher quality speaker I think the NUMBER ONE subs on the market is Eclipse's line of subs VERY VERY LOUD and SUPERB SQ.

these are some of the tightest subs i've heard....... can handle loads of power and ask for more

long break in period

these are not for your average bass head (go buy rf) these are true sq subs and do it well

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boston pros ,infinity perfects, jl,alpine,etc....

Looks sweet, "VERY LOUD AND DEEP", works in .88 cuft enclosure, good buy for the price, I'm very pleased with my purchase this is an SPL and a SQ sub if you haven't heard one then you NEED to then tell me what you think about it thats all i have to say.

nothing a very beautiful looking subwoofer i think so anyway

To Mr. "kewl" who has posted 3 reviews with 1 as stars for the MOMO ratings: Get the HELL out of car audio you dont know what in the world you are talking about there is no Kenwood amp even made that can do a MOMO 12" justice and there is NO pioneer sub even made that could fit in the same enclosure as the MOMO 12" so what are you talking about? Please stop posting these bad ratings for such a terrific product! My MTX 500D puts out around almost 1 kwatt and this thing is hellaciously loud and very very clear, I work in Circuit City and they sell momos along with perfects and all the pioneers and NOTHING in the store comes even close to comparing with the momos the momos are a very high quality speaker. the perfects are very similar to the momos but i believe my momo sounds deeper and more accurate and just as loud as a perfect.
PLEASE STOP POSTING THOSE BS POSTINGS WHICH MEAN NOTHING THIS IS A SICK WOOFER DONT GIVE IT A BAD NAME LET SOME PEOPLE FIND OUT HOW SWEET THIS THING REALLY IS BECAUSE ITS HIGHLY UNDER RATED EVERYONE WHO HASN"T HEARD IT OR DONE IT JUSTICE LIKE YOURSELF HAS THE SAME OPINION AS YOU!!!!!!!!!!!!!!!!!!!!

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RF punch and kicker vr solo nothing i've heard compares to the momo besides the Infinity Perefect 12 I heard 2 of those and they were VERY VERY loud. I've heard eclipse which i think is better than both but eclipse is like top of the line for SQ and SPL.

Looks by far. They sound very good.

Heavy and a bit pricey if you buy them retail.

I think they are great Subs. They hit hard and i don't have a big amp. I wish i had put them in the box backwards to show off their looks because they are amazing to look at. Very High Quality.

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These are up there with all the top of the line subs.