i have two cvr15s in a 6 cuft box tuned to 35hz. i powering them with a directd 1500d. they get fairly loud. but take up my whole trunk. i really think that they would like a bigger box though. these thangs will wang and are great budget subs and diffently will do more than enough in the loud department.
i have two of these in a 4.55 sealed. i was under-powering them and they got pretty loud. im now awaiting the arrival of a hifonics 1505d. should be good .//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif
Ill be putting them in an EXT cab ranger. So they should get pretty loud outside. Ill be putting 1000 RMS to them. I would like to build a ported box, but I dont know if i have the spece for two of them. Let alone four when i get them later on.
My friend has two in aproxx. 5ft sealed with 1000RMS and its pretty loud, they are great subs for you if there in your budget range and you have the room!
When I get four I think I am going to build a wall and port it. Tuned really low. Theyre in my budget. The audio shop knocked off 60 bucks each for me.