illidian said:More depth means a bigger cabinet, which
means better low frequency response. So you're right, depth
does not mean more low end per se, but a bigger cabinet is
better for low requencies (if this wasn't true, bass cabs would
be much smaller ala guitar cabs).
This is a bit over-simplified, particularly since this is a
ported box design.
The increased depth referred to earlier of 16.5 and 16 inches
alluded to that the depth of the cabinet was the determining
factor in low end response. Actually, the total internal volume
is a factor, but only one of the factors determining the
response.
The T/S parameters of the driver have a significant impact on
the desirable box volume and tuning, which is why you
now see transducer manufacturers listing the parameters
in their product specifications.
Too large a volume can cause the response to peak or hump
and the lo end frequency response to fall off rapidly,
depending on the T/S parameters of each specific driver.
As a result, trade offs are made, with the object of
achieving optimum flat freq response through the usable
range of the driver, extending the low end response as far
as is feasible, while maintaining good speaker efficiency
and SPL.
So the equations are kind of like a balloon, you push in in one
area, but get a bulge elswhere, so you have to decide what
you can live with.
WinISD, a freeware program, has many preloaded TS
parameters for popular drivers, or you can load your own.
Then you can change box dimensions and volumes, and
see the predicted frequency response curve.
Finally, the size, shape and length of the ported vent(s) is
a major factor in the frequency response and performance of
the rig.
If you read the retro-fit thread in my sig, you can see
how the box was modelled using WinISD. So, I went
through this whole learning curve recently as well, and
though I would pass it on.
If I were building a SS rig from their empty box, I would
use this program to optimize the cab after choosing the
drivers and loading the driver parameters, and the box
dimensions. I would then fiddle the port lengths for
the best available curve.
************************
I have had good results with SS, and Cindy has always
gotten back to me.
I was particularly happy with the 1/4 locking jacks they
offer, and are often out of. They pop right into a 13/64's
hole, with a small channel route required. Thumbs down
to the small plastic corners, I had 2 crack on installation
and subsequent handling. I did advise SS of my experience.
BTW, their 14.99 mic boomstand is a great deal if you are already shipping something.
BTW, Jay, thanks for the review. It's a decent deal!