i do not think it is necessary to have one for a subwoofer. i have 2 good powerplant 12s and 2 junk powerplant 12s i was thinking about usin the 2 junk ones and turn them into passive radiators. but i did a little research on it and realized that the passive radiator just produces lower freq. then what the Speaker produces, but in the case of a subwoofer it already produces low freq. plus from what i understand most subwoofers produces frequencies lower then what you can hear anyways to theirs no point in producing ones any lower. also a passive radiator is not just a cone to a speaker its actully has a weight on it. why? im not quit for sure maybe to make it a little harder to move i dont know, im not a expert on this just telling you what i think.
and normally you need around double the area in radiator than subwoofer to start with. I did a passive radiator setup with some TC Sounds radiators, and they work well, since they're tunable by changing out weights.
yeah i know a little but say if i were to use my critical mass in this set up and wanted to tune lowwhat should i do about getting the right stuff and size box?thanks for yalls help this is what makes realm, realm...
I'm not sure where all the misconceptions about pr's comes from. a pr is the same as a port it is another radiating mass used to compliment the front wave of the powered driver by tuning its mass. a port uses the compressed air in the box as a complimentary driver by exchanging a column of air at a given resistance in and out. where with a pr the port volume is traded for cone mass. there are allot of arguments over weather or not a pr can be as loud or efficient as a traditional port. i have used many pr's in home theater setups. I don't know why they have not been used more in Car audio. in car audio space is almost always at a premium. with a pr the "port" takes up almost no space and you have the added convenience of changing the tuning freq in minutes by adding or removing weights on the cone. I would love to experiment in a car with this but I have not as yet.
Stratus do you still have yours?? are you interested in selling them??
THAT'S why it's called Ohm's Law NOT Ohm's Opinion!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
diymobileaudio.com is the DIY car audio install forum for automotive quality and spl stereo bass. 12 volt audio installation wholesalers buy amps, subs, double din car audio head unit electronics and ipod blue tooth car alarms at discounted prices