Precision Devices PD.2450 in OB, or alternatives ?

[63781]

At 20 Hz in a room of any "small" size there is nothing like sound propagation - it's solely excitation of modes. Could it be that a velocity transducer works more efficiently in the middle of the room than along any borders?

Then what happens below the lowest mode of the room? There are no modes to excite.

A velocity transducer (a dipole) is not more effective in the middle of the room, actually its the opposite - it should be placed near boundaries where is will also produce the smoothest frequency response below the Schröder frequency. Above it is a different matter....

 

[martinsson]

Perhaps this thread is long ago abandoned, but on the off chance it's not I would like to share some pictures on the matter :

More info here :

Martinsson's Blog - new place - new refinements of madness

 

[Elias]

Likes

Can you open a thread about the 2" full range driver in that horn ? 😀

 

[martinsson]

sure :

http://www.diyaudio.com/forums/full-range/205146-2-madness-hornloading-tb-w2-803sm-5.html

🙂

 

[manninen]

Whats wrong with my computer, or my search engine.
Could be that my chrome understands that pd2450 ain´t safe for me
i just found this thread and even known playground, damn!

Pm sent to martinsson