Quote:
Originally Posted by
cookieattk /t/1466549/calculations-and-design#post_23163905
woofers were shielded they were replaced with these
http://www.parts-express.com/pe/pshowdetl.cfm?&DID=7&Partnumber=295-356&ctab=1#Tabs b/c crt screens are not used anymore
I know, but those speakers require a redesign of the enclosure. I don't know much of making speakers/modeling at all.
"Looking at the new 8-ohm, non-shielded
driver specs, they are going to be close, but
will they be close enough?
With a little back of the envelope calculating,
and comparing the published specs, it
appears that the new unshielded RS drivers
T/S parameters suggest slightly smaller
enclosures, slightly higher f3’s and (very)
slightly lower sensitivities. The good news is
that I was told by an undisclosed source that
the new drivers were Klippel optimized.
RS225 Shielded vs. Non in the Statements
Initial Thoughts:
The enclosure size is fine and if the tuning is
raised 3 Hz, will come very close to the
transfer function of the shielded woofer. The
maximum modeled difference in dB is less
than .5 dB, and the f3 drops by 4 Hz for the
non shielded version model. In addition, the
enclosure size could be reduced by 20%, to
80 liters, with no increase in f3 over the
original design. The ‘new’ driver sports a
slightly smaller Sd than the ‘old’ driver (which
obviously didn’t change) which is used to
calculate the SPL, so the SPL differences may
be even smaller than modeled."
It sounds like it means I need to make adjustments to the enclosure. If I don't though I'd give it a shot later. The cuts make sense for the most part, although the assembly diagram is a little confusing.