Aeros are the absolute easiest way to change tuning on the fly. You can cut the port lengths or stuff a shirt and or plug in one to tune to whatever your heard desires.
alright i have one XXX 12 and the specs on the site say 2.2@34hz
but from what ive heard there way off the specs they really need
and w.e the true specs r i want the box to be tuned low in the low 30s high 20s cause the music selection i listen too. so how much or many ports would i need to be around the 28hz region...
1 4" port 16" long or 1 6" port 36" long at 2.2 cf lol u needs way bigger box or 34-38 tuning //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif
and thats only at 30hz dude why does everyone insist on tuning below 35 it has almost no benefit in a car with a single 12" sub lolz
if you want lower than 32 tuning on a single sub get an 18