Passive radiators?

[Mackenzie]

Has anyone used them on here? Im looking at some to go along with my 18s, so that my output is sufficient for my needs. Im looking at running 2 18 maelstroms sealed in about 5 cubes each, and Ide get 2 passive radiators. Any comments on them? From what Ive heard, they are another way to get louder, without going ported, but Ive never really studied on them. This particular one is made for the maelstroms.







link

http://www.diycable.com/main/product_in ... cts_id=686

[Rold Gold]

I've been waiting for this to come about for a couple weeks. I found this while looking into what Boston was putting out these days. Looks like that might be a kool install.


http://mobile.bostonacoustics.com/car/c ... ily_id=130

[smgreen20]

Damn, the excursion on those Bostons..... 3 3/4" p/p! That's 1 7/8" one way!

Tunable passive radiator too. Now I'm interested.

[mhyde71]

yeah they're like 450.00 each too. (the spg555 that is) if that's what your referring to..

[stipud]

It works like a port, without all the port noise. It's not quite as efficient at producing "free" bass, but it sounds a lot better doing it.

Make sure the box and PR weight is EXACTLY as specced.

[fuzzysnuggleduck]

Yep, I think PRs vs Ports pretty much comes down to personal preference. I did find a list of posts where people actually measured both, their conclusion was that for equally tuned PR and Port setups, the results are very similar.

[Bfowler]

I've been waiting for this to come about for a couple weeks. I found this while looking into what Boston was putting out these days. Looks like that might be a kool install.


http://mobile.bostonacoustics.com/car/c ... ily_id=130

hmmm neo magnets on a sub. i'm willing to gambol on that. i give my subs to much of a work out

[Mackenzie]

It works like a port, without all the port noise. It's not quite as efficient at producing "free" bass, but it sounds a lot better doing it.

Make sure the box and PR weight is EXACTLY as specced.

Do you think it would work if I have 2 18s firing towards the rear of the trunk, and and the prs firing upwards towards the trunk lid. Will they still be effective? I wasnt sure if the pr needed to be right behind the actual driver.

[fuzzysnuggleduck]

Tom has his PR installed in a box where both cones are on the same plane.

[Mackenzie]

I talked to diycable about the maelstroms, and Im confident I wont need the prs. Besides, I was told ide need 2 prs per driver, and I dont have the room for that. I was told that he puts about 3k on them before it really starts to do some damage on them. With that said, Im going to have 2.2k on each 18 sealed.

[nico boom]

I was told that he puts about 3k on them before it really starts to do some damage on them. With that said, Im going to have 2.2k on each 18 sealed.

Now THAT'S what I call a subwoofer!
Sealed has been my favorite for ages when you have the POWER to run them.
You can expect some serious TIGHT bass, even though those cone-areas are quite large..
You do want to make sure that those cabinets are VERY SOLID BUILD though.

[Mackenzie]

I was told that he puts about 3k on them before it really starts to do some damage on them. With that said, Im going to have 2.2k on each 18 sealed.

Now THAT'S what I call a subwoofer!
Sealed has been my favorite for ages when you have the POWER to run them.
You can expect some serious TIGHT bass, even though those cone-areas are quite large..
You do want to make sure that those cabinets are VERY SOLID BUILD though.

Indeed.. The front of the box will be double baffled, and box heavily braced. With the driver weighing in at about 55 pounds, and massive excursion, it will have to be.

# X-max: 33mm
# X-mech: 40mm


Its an inefficient driver, but Im going to have 2200+ on tap each. Btw, this woofer is highly reguarded on diyma. Supposedly one of the best high output/ accurate drivers out. So I guess I am kind of crossing over to the sq realm. Kind of atleast

http://www.diycable.com/main/product_in ... cts_id=681

[nico boom]

I'm interested in hearing your opinion about how they play when finished,
since a friend of mine is helping me with pooring a concrete cabinet for my cerwin vega v-max 15 inch woofer.
This also will be a closed cabinet, since it's [obviously] ment for home audio use. [it's gonna be very heavy for sure ]
This unit also has a x-max of 20,3 mm. one-way, sensivity 93W/1mtr, and a Fs. of 17Hz.
A promising unit as well, though the maelstrom obviously has way more cone-area with it's 18 inch....
Good thing you have a lot of power to get this thing moving, [low eff.] and keep it in control.
Like to hear your opinion, when these MONSTERS comes to life.

[Mackenzie]

I'm interested in hearing your opinion about how they play when finished,
since a friend of mine is helping me with pooring a concrete cabinet for my cerwin vega v-max 15 inch woofer.
This also will be a closed cabinet, since it's [obviously] ment for home audio use. [it's gonna be very heavy for sure ]
This unit also has a x-max of 20,3 mm. one-way, sensivity 93W/1mtr, and a Fs. of 17Hz.
A promising unit as well, though the maelstrom obviously has way more cone-area with it's 18 inch....
Good thing you have a lot of power to get this thing moving, [low eff.] and keep it in control.
Like to hear your opinion, when these MONSTERS comes to life.

Will do. Here is a thread with one being used in the home.

http://www.avsforum.com/avs-vb/showthread.php?t=1051665

[BEAVER]

PR's are typically a bad idea in an auto environment. Durability is not their strong suit. Having that much mass attached to the back of the PR in a vehicle that bounces around is not a good idea.

[TiEcs]

Does anybody knows when the Boston SPG-TR will be available ?
I can't find any shop selling them.