Site Links
Howdy, Stranger!
It looks like you're new here. If you want to get involved, click one of these buttons!
Quick Links
Categories
In this Discussion
Please review the site Rules, Terms of Service, and Privacy Policy at your convenience. Rules, TOS, Privacy
Get familiar with the reaction system: Introducing the Reaction System
sub cabinet design
Hello, I am having a heck of a time trying to learn winISD, in an atempt to complete 3 sub cabinets. Are there any meetings coming up that I might glean some information and or assistance learning how to use the software? I cant even get it to download properly. I am not very computer savy!
Thanks
Bill
Tagged:
Comments
Don't know where you are located, but InDIYana is in early May this year in Ft Wayne, IN. While I don't use WinISD, someone attending there likely does.
InDIYana Event Website
Or you could throw up the specs and what you are looking for on here, and someone would probably sim it up for you.
I really should write another tutorial for WinISD.
Hey @B_Riley - there area number of different versions of WinISD on the net. What works for me is WinISD Pro v 0.7.0.900.. Also, if you have MS Excel, Unibox is about the same.
Have you seen the WinISD tutorial by JR? https://midwestaudio.club/?page_id=14662
That was a pretty good tutorial for the legacy WinISD, but I personally prefer the "new" version.
Here is a download link to the "new" version:
https://1drv.ms/u/s!AlHuPRQmBiX2iKgAvdapXZfFQP2sJA?e=9Oh8bq
It is small enough to email if need be.
Most of the principles I demonstrate in the older version are applicable to the new version, as well. I have no issue running it in Win10/11.
Here is the WinISD page where you can download the legacy version. Download 0.50 and follow the tutorial. Ask questions here, helpful bunch of guys.
Once installed, IMO the biggest hump to get over is figuring out how to input driver TS data so it will actually use it and not error out. At a quick glance it seems JR's tutorial probably has that nailed down. Basically you need to add the minimum amount of data to get the program to calculate the rest and be happy.
Thank everyone. I will get busy
Well after some frustrating attempts, I once again found that I am not very computer savvy, and have given up attempting to make this design myself. My talents are in carpentry and veneers so I’m asking the club if there is any chance of hiring someone to take the specs from my two drivers, and create a cabinet. Two of the subs are Daytons UM12-22 Ultimax, the other is a Dayton 10” that I have specs for as well. My limited research on the 12” recommends a sealed box, but I want to add a passive radiator. I also want that passive driver placed on the front baffle similar to what ‘Polk” has done for years. I am more than willing to pay for your time. I recently upgraded my “Solstice” from Parts Express with a new Xover’s and Morel tweeters from Madisound, I am extremely happy with these, and plan to add these subs to the system . Greatly appreciate any feedback or help. Bill
@B_Riley Apologies ahead of time if any of this seems like I am talking down/below your knowledge. I am intentionally overcommunicating as I don't know your level of knowledge and don't want to potentially leave you behind by making incorrect assumptions.
Passive radiators (typically referred on the forum as "PR", I will switch between) in WinISD are a little more tricky than other alignments in the program. WinISD doesn't have calculation to figure out initial ballpark values. So, by default, it always starts with a single PR with no added mass and 1.766cf enclosure size. You must hone in what combination of enclosure volume, number of PRs, and PR added mass gets the desired results. It takes experience with the program to get a feel for.
The UM12 driver indeed works well in a sealed enclosure. A passive radiator is not a sealed enclosure as far as the driver is concerned. It is functionally the same as ported in that regard. The PR replaces the port, but performs essentially the same task, and requires tuning like ports require tuning. The UM12 needs a larger enclosure than sealed to work well in this config. The driver is quite the animal at full power and will require $$$ in PR/s to handle. Note: below is for a single UM12. If two drivers in the same enclosure, then double the enclosure volume, number of PRs, and amp power for the same calculations.
For example:
On the left is the response function: y axis is db, x axis is frequency (hz). IE: The output volume vs frequency if the signal output were to remain flat across the frequency range.
On the right is the PR cone excursion at the specified signal power output: one-way movement of the cone in mm... against frequency also, but that is unimportant here. (Your amp could have a "subsonic filter" to reduce overexcursion at the lowest frequencies. Though that is a bit out of scope for the moment)
I picked 500watts as that is a common plate amp spec.. near, but under, the UM12's rating and doesn't endanger the driver from overexcursion until below 20hz in this enclosure. At 500watts signal the $175 15" PR is maxed out: 29.8mm of it's rated 30mm mechanical excursion capacity. To achieve the ~20hz F3 as shown (frequency where the output is 3db down) all 7 of the included 75g weights must be added to the PR to drop the tune down in that enclosure size... A 15" cone moving nearly 2.5". oof, that'll get your attention
Alternatively, two RSS315-PR (12" reference series PRs) with all 6 of the included weights added to both PRs will accomplish a near identical response curve. $125 ea currently (x2). Slightly "safer" PR cone excursion estimates at full 500watts. But this has one potential big benefit for a single-UM12 enclosure (see below).
Then there is a potential issue about that much mass swinging around. The 15" PR with all the mass added totals 2lb of moving mass. I would not be surprised if it could walk the enclosure around the room even at moderate output. Similar with the two 12" PR setup unless each are placed on opposing sides of the enclosure to cancel out the forces. Even the UM12 that I had in a sealed 2.0cubic foot enclosure would visibly shift the enclosure side to side at high outputs just by itself.
Lastly I believe at some point the specs changed for the UM12. I didn't compare my specs in WinISD to the current posted specs on PE. It doesn't matter much, as it only matters what specs your driver has.