[sdiy] ot: audiophile cones was, Oh I wish I had never said that...

[Magnus Danielson]

From: harry <harrybissell at prodigy.net>
Subject: Re: [sdiy] ot: audiophile cones was, Oh I wish I had never said that...
Date: Sat, 27 Jan 2001 18:25:53 -0500

> Hi Nick:
> 
> My understanding is that they decouple the speaker vibrations from the
> mounting
> surface, mainly the floor. The low frequencies are poorly coupled by the
> tiny
> contact area.

Strange... I've used to discuss how to make the speaker COUPLE to the
floor and walls, basically letting them become baffles. If you have a
bas-speaker in a room, put them tight up in two corners and you are
basically there, that's good use of the rooms aspects. Doing that, you
can pump less energy into the speaker for the same effect.

If you place the speakers somewhere in the middle of a wall (say
halfway to the corners from the center), then the speakers will have
to emit energy into twice the space-angle as if they where in the
corners. This is all classical schoolbook stuff.

> Some folk like alternating layers of foam and something heavy.. like
> wood... concrete
> etc.

That would form a good decouple of lowfreq stuff, but I wounder if the
effect would be very prestine. These people tend to use vented
speakers anyway, and then you've lost before you got started. Most of
the stuff I've seen is passively filtered, then you have a big looser
on your hands.

Then you have manufactors that doesn't know what polarity means. Oh
my. You *really* want to check polarity before you start doing
anything, especially on bas-speakers. You sense more "punch" if you
have the polarity right (that is, a positive going kick pushes air out
of the cone and into your chest, just as a real bassdrum would).

> I like laughing a little bit at this behavior...

Please do, please do.

Cheers,
Magnus