Ultimate Subwoofer Driver

[Geenius]

Originally posted by AndrewT
Hi Circlo,
Can you expand on that.

I would expect the response to be very droopy after passing below the Fb which for Q=0.19 could be way up at 50Hz.

Low Q does not suit flat response to low frequency.

You compensate it at the top-end. Due to its high 99dB efficiency, absolutly speaking you still have plenty of output level in the 20-30Hz range compared to a standard subwoofer. So instead of boosting the bass, you kill the upper end output level.

I use two of them in my living room and with some active correction I can get a -3dB point of 15Hz from a closed box with hardly any visual cone movement. The box on the photo has another PD2150 on the opposite side to the one that can be seen.

[Puggie]

I'm going with the stick it in a car solution and use the cabin gain, the rising response of 6db/oct from about 75Hz rising to 12dB/oct should prop the bottom end up nicely

it's his fault ^^^^^^^^^^^ he agreed it might work and wasn't a crazy (well not too crazy) idea!!!

[cemmany]

Hello Friends , Iam Looking for the ultimate 15" or 18" subwoofer driver. I have in mind the Aurasound NRT 18-8 and the Adireaudo tumult subwoofer 18D series . Do you guys think there are any better subwoofer drivers past the aurasound and Adireaudio.I heard that there is a company in thailand or philipines iam not sure ,which is called paudio or ps audio iam not sure about the name.I heard its good too.Can you people suggest the best driver in performance and sheer powerhandling.Iam going to construct an ultimate passive subwoofer for my speakers.I would be grateful if you gues help me out on this issue.Thanks a ton pals

[Geenius]

Originally posted by Puggie
.....it's his fault ^^^^^^^^^^^ he agreed it might work and wasn't a crazy (well not too crazy) idea!!!

[newfinish]

http://www.hempacoustics.com/

their coming soon with 25" excellent speakers

[pneuma]

Originally posted by AJinFLA
Ok, the place that sells (or soon will) the "ultimate" driver (subwoofer, tweeter, you name it) is here: http://www.ologyaudio.com/

cheers,

AJ

Umm, those don't even exist yet, so how can you say that they are the ulitmate anything?

It's no problem to get excited about them, but I don't think Accuton or Fostex are going to stop making speakers just because of a link and some specs.

Boy they sure do have the hype train loaded up and rolling though.

P.

[ShinOBIWAN]

Originally posted by pneuma



Umm, those don't even exist yet, so how can you say that they are the ulitmate anything?

It's no problem to get excited about them, but I don't think Accuton or Fostex are going to stop making speakers just because of a link and some specs.

Boy they sure do have the hype train loaded up and rolling though.

P.

I think AJ was being sarcastic.

[pneuma]

Originally posted by ShinOBIWAN


I think AJ was being sarcastic.

In that case, color me retarded.

P.

[Circlomanen]

With a 300 liter box tuned to 15 hz I get -9 dB @ 20 hz compared to 100 hz and -12 dB total loss of efficincy compared to 200 hz and uppward. Thats easy to compensate for with roomgain and electronics.
With the PD2150 you got som power to waste if needed!

[Circlomanen]

Geenius, thats a nice looking sub you got there!!!!