[sdiy] semi ot: loud speaker for synths

[Don Tillman]

   > Date: Wed, 26 Nov 2003 17:48:22 +0100
   > From: "Czech Martin" <Martin.Czech at micronas.com>
   > 
   > The number of inches says nothing about the quality of the
   > driver.

That's certainly true.  

In any kind of driver size discussion there has to be an understanding
that we're comparing the effects of size only, and that the other
parameters will stay constant.  Unfortunately that's physically
impossible; just changing the size will change most of the parameters.

So to have any  proper sort of  discussion about driver size there
needs to be a framework of what parameters or combinations of
parameters need to stay constant.  But that's way, way off topic...

   > Certainly a 30" membrane will be difficult to control.

Anybody remember the ElectroVoice 30W 30-inch woofer?  Wheee!  

And when I was young, a neighbor had a Pioneer 36-inch woofer in his
basement.  (!!!)  This was a very unusual speaker. It wasn't enough it
was ridiculously large, but the cone was driven by three separate
voice-coil-and-magnet assemblies and a metal pyramid-like structure
connecting them together to the apex of the speaker cone.  This
speaker wasn't in an enclosure or anything, the neighbor wasn't
really sure what to do with it.

  -- Don

-- 
Don Tillman
Palo Alto, California
don at till.com
http://www.till.com