efficient, loud, deep.

none

Efficient. In a Grand Cherokee with a low profile box. Hardly any air space with only 100 watt Angina amp pushing it and it sounds awesome.

insanely loud can take what ever u throw at them

weigh 40 pounds each, may come from factory wil crappy glue job so may have to get that replaced

first off these subs are crazy LOUD!!. Each sub weighs about 40 pounds. i put both subs in a big custom ported box that weighted over 100 pounds easily. i had these subs in a 93 grand am and when i first turned them up it blew my trunk key lock out of my trunk no joke so i had a nice big hole there that was later covered up with duck tape. After a summers worth of bumping i started to notice a funny sound coming from the subs. I took them out and noticed the plastic part covering the cone was coming undone. i took them to a repart shop and both subs had a crappy glue job from the factory. so got them fixed and put them into my new car. i got a 99 grand am and had a really hard time getting the box into my trunk. Powering these monsters was a Lanzar Vibe1800D mono amp. this is the only amp i have purchased and still have it to this day. it is a great amp. never shuts off or goes into protection mode. upgraded my battery to a yellow top and got a 1.5 farad capacitor but still my lights dimed like crazy. this pasted october my car got broken into and the thifes got away with my deck, subs, radar and megaphone, but i still got the amp and cap. overall if you want super loud subs get these