Originally Posted by
RMC
Hi Greg,
Good idea to get the Dayton gizmo so that you know exactly what kind of TS parameters you're dealing with. Sometimes folks get surprises, not always pleasant ones, after some "modification" to a driver. I remember one here that I helped he did same as you: he got the DATS 2 at the time, measured the woofers he bought used, when he saw the results the adjectives about the seller started flying, bastard, etc. If I recall right he abandoned the drivers. Knowing ahead of time, before further holes are cut in speaker baffle like in your case, is way better since one may be able to salvage a project with some work around (vary vol. and/or tuning).
Btw just learned from you DATS 3 is finally released, been waiting for it since V. 2 has been around for a while. Last time I checked it was still at version 2... Now V3 is on my near future shopping list.
You indicate having downloaded Win ISD again. Which version? 2002, 2004 or 2016, hopefully the last one. Note that, contrary to many other programs, Win ISD uses a box loss assumption of QL 10 which is NOT standard practice, often too optimistic, and this affects low frequency response modeled. The recognized standard is QL 7 so its better that you change in the software the default 10 for 7. Easy, here's how:
When you're in BOX tab look at bottom of screen and click on ADVANCED and a small window shows QL 10 and others, click on 10 and another small window shows 10 in blue, type 7 instead and close the window. Now you have QL7 for the moment. If you save a project with QL7 it should stay at 7 when you reopen that project (check it). HOWEVER, Win ISD always defaults back to QL10 when you open the software for a new project, so everytime you must not forget when in BOX tab to go to ADVANCED and change again QL to 7 instead of 10, a little pain in the ass...
Your box pic shows the woofer cut out is lower than middle of the boxes so that should help you reduce standing waves in the cabs. If I were you I would avoid making any other baffle holes until you get a good set of TS from DATS 3 and do some Win ISD simulations. Regards,
Richard