convert Thiel-Small parameters to optimum enclosure volume..

Archived from groups: rec.audio.pro (More info?)

Roscoe East <roscoeeast@yahoo.com> wrote:
>Is there a straightahead method for determining the optimum volume for
>a loudspeaker enclosure based on a particular driver's Thiel-Small
>parameters?

Not really, because the optimum volume depends on other factors too. Do
you want the loudest possible low end? Do you want the most extended
possible low end instead? Or would you rather have the most tightly
controlled low end?

>And conversely, is there a way to determine the optimum Thiel-Small
>parameters (or, really, to select an appropriate driver) based on an
>existing enclosure's volume & port size?

Again, it becomes to some extent a matter of taste. You can pick a
particular alignment then work back from the box parameters and the
alignment to figure the device parameters you want.

>And is there a way to determine how a given driver will perform in a
>given enclosure if you have all that information?

Yes.

A good introduction to all of this stuff, and one that gives very
simplified plug-and-chug methods, is Vance Dickason's _Loudspeaker
Cookbook_.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

Archived from groups: rec.audio.pro (More info?)

In article <0IZYe.9109$wm3.7884@newsfe6-win.ntli.net>, "Tim Martin" <tim2718281@ntlworld.com> wrote:
>
>"Roscoe East" <roscoeeast@yahoo.com> wrote in message
>news:1127506806.578369.214000@z14g2000cwz.googlegroups.com...
>> Is there a straightahead method for determining the optimum volume for
>> a loudspeaker enclosure based on a particular driver's Thiel-Small
>> parameters?
>
>Yes, download a free copy of WinISD and try it. You can simulate several
>enclosures at once, and if you plot them in different colours, you'll easily
>be able to see the difference. I don't know how accurate WinISD is, but it
>will give you a feel about the tradeoffs in speaker cabinet design.
>
>What kind of speaker are you thinking of, though? You can't simply replace
>drivers in hi-fi speakers without taking into account the crossover..
>
>Now if you're talking about proper speakers, for you use with bass guitar,
>that's another matter ... :-)
>
>Tim
>
>

Seems to me bass guitar speakers , at least in the past, have not always been
made with TS parameters, or in some manner, not used in the proper
way, but may have created a sound which was desirable or not.

greg

Archived from groups: rec.audio.pro (More info?)

Scott Dorsey wrote:

> GregS <szekeres@pitt.edu> wrote:
> >
> >Seems to me bass guitar speakers , at least in the past, have not always been
> >made with TS parameters, or in some manner, not used in the proper
> >way, but may have created a sound which was desirable or not.
>
> Instrument speakers aren't like regular speakers at all, any more than
> instrument amps are like hi-fi amps. They aren't intended to be accurate,
> they are intended to be interesting.

The SR speakers from Precision Devices ( born of Turbosound ) have T-S parameters
that defy common understanding.

They work well when shoved in the recommened boxes though !

Graham

Archived from groups: rec.audio.pro (More info?)

"Roscoe East" <roscoeeast@yahoo.com> wrote in message
news:1127506806.578369.214000@z14g2000cwz.googlegroups.com...
> Is there a straightahead method for determining the optimum volume for
> a loudspeaker enclosure based on a particular driver's Thiel-Small
> parameters?
>
> And conversely, is there a way to determine the optimum Thiel-Small
> parameters (or, really, to select an appropriate driver) based on an
> existing enclosure's volume & port size?
>
> And is there a way to determine how a given driver will perform in a
> given enclosure if you have all that information?
>

By the way, you might like the DIY speakers mailing list

http://diyspeakers.net/mailman/listinfo/diyspeakers

Tim