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Message 2127
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| Subject: | [RESOGUIT-L] Re: coverplate open area | | Date: | Sunday, January 8, 2006 11:56:14 (EST) | | From: | DeweySlideWell <DeweySlideWell @...com>
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Bobby Wolfe used to talk about "backloading" the cone.
In general, this means placing in the body cavity, a
soundwell, scoop or an actual baffle.
The point is to stop the air (which carries our sound)
from being able to simply rush right out of the body.
When done properly, it makes for more tone, more volume
and a better sounding guitar than the same model without
this modification. I know there are others who may disagree.
This is just one way of doing things here, though I for one
think it is the best way. My theory is that the backloading
does several things. One is to compress the air within the
cavity more than it would be otherwise. Compression equals
amplification in this instance. It also serves to add a *slight*
delay to the wave, helping to nullify the problem of the wave
from the bottom of the cone tending to cancel out the wave
from the top of the cone. Two sound waves 180 degrees out
of phasecan cancel each other out you see. I think they call this
the Science of white noise.
A baffled body makes the wave from the top of the cone more
pronounced. Most of the bass comes from inside the body,
most of the treble comes from the top of the cone. A baffled
body enhances the treble, by modifying the Bass.
The body cavity is The Bass Chamber. The air space between
the top of the cone and the bottom of your coverplate is The
Treble Chamber. The same principles apply to this chamber as
they do to the body cavity. The parts of the coverplate which are
*not* open are your baffle/soundwell here. BALANCE between
these chambers is what makes a good Dobro sound.
That is why I say that perhaps having too much open area is not
necessarily a good thing.
Good luck,
D - S - W
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Re: coverplate ope
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