May I have a link for it please?
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Introducing Directiva - An ASR open source platform speaker project
- Thread starter Rick Sykora
- Start date
I was searching as "VCAD" and failing. I found it now. Many thanks.
I've installed VituixCAD2 but unless I am wrong it doesn't come with a library of drivers. You can create one but the argument I was making is it is not easy to search all drivers on the market one by one.
Also, it is an unnecessarily complex application for the simple job I have tried to explain, which basically finding the suitability of a drive unit to a given enclosure.
Yep - VituixCAD is exactly what you want, specifically the "enclosure" section in tools. VCAD is leading the way in complete speaker design software imo, REW for measurements.
I think if such a program exists you would be unemployed
.Aside from having to enter the T/S manually if it's not included in the list already, I think it does exactly what you want it to do, no?
OP
- Thread Starter
- #787
We considered a sealed box early in the design and the woofer was not designed for it. It needs a really small box and this causes some other ugliness. I use Bassbox Pro as it has better damping sims than VCAD. The box volume would be less than half of the PR design.
This is discussed earlier in this thread.
I’m failing to explain what I am looking. I am looking for a driver database, where simple parameters including TS values that is attached to a simple calculator. It’s to be a tool to find suitable drivers for an enclosure.I think if such a program exists you would be unemployed
Aside from having to enter the T/S manually if it's not included in the list already, I think it does exactly what you want it to do, no?
Enter your enclosure volume and decide closed or ported. The calculator will plot the FR and show the f3 for the selected driver. This will help one to eliminate the drivers that are not suitable in your enclosure size.
I'm not sure whether a curated Database exists out there similar to other industries, perhaps other members may chime in.
you can do that VCAD, as long as you feed it T/S parameters yourself. but i guess I already conveyed that message few posts ago.
I doesn‘t need to be curated just the data of the basic parameters of each driver. As there are various databases linked to posts here I was hoping one to exist.
OP
- Thread Starter
- #791
For a quick check, I use an IOS app called Speaker Box Lite.
VCAD has a fair number of drivers, but to see them fully, you need to check the online data box in the Enclosure calculator.
The cabinet volume is, of course, much too large. But better that way than the other way around. If necessary you can reduce the volume by fixing a styrofoam cuboid, a brick, Head of neighbor's dog,... inside the enclosure.
With 15L internal volume the frequency response below is to be expected. The dashed curves represent possible filter targets at 80Hz - BU12dB@80Hz and LR24dB@80Hz.
However, the whole thing only makes sense if you plan to use an active speaker. As a passive speaker it will not work with this driver.
As I said, you can still adjust the volume if necessary, I have simulated it here with 15L further.
Already one simple filter (BU18dB@75Hz) and you can almost achieve an ideal LR24dB filter slope at 80Hz. The remaining correction with PEQ and, or cabinet volume reduction.
At a crossover frequency of 80Hz, the Xmax of the woofer no longer plays a role. Before this limit is reached, the woofer gets thermal problems.
I'll check the iOS app. Meanwhile, I find the online switch and there are indeed a lot of drivers. Thank you for your help.
WinISD has generally been the standard tool used for subwoofer modelling, and there are various collections of drivers out there. I'm not sure about more recent drivers like the Purifi though. WinISD has a decent data entry process though- it applies consistency checks as-you-go, and it's a relatively painless process to enter a new driver from the manufacturer data sheets.
Got there in the end
From what I can see by a quick look both VCAD and WinISD have decent size databases. However, neither is suitable to my purpose, which is to quickly "scroll through" drivers (preferably with min-max diameter and power limits), eliminate the unsuitable ones and feed the suitable ones to a list (favourites). This will allow the designer to then use the secondary criteria to reduce the list even further (like price, availability, diameter, power handling, etc.) This will make the life of DIY speaker builder much more easier than having to select each driver one by one and relying on memory. In short I'm looking for a tool that helps me to select drivers suitable for my enclosure.
Meanwhile, Speaker Box Lite seems to have range selection for various criteria. I will spend more time on this and report. If it interests me enough I will create a new thread in order not to pollute this thread further.
Thank you for helping this 71 year old ex-speaker manufacturer who has not been involved with speaker design since mid 90s.
Meanwhile, Speaker Box Lite seems to have range selection for various criteria. I will spend more time on this and report. If it interests me enough I will create a new thread in order not to pollute this thread further.
Thank you for helping this 71 year old ex-speaker manufacturer who has not been involved with speaker design since mid 90s.
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digitalfrost
Major Contributor
This is excellent as a database. All it needs is the following.
Enclosure volume Vb entry field
Enclosure type: sealed/ported selection
Min f3 frequency - Max f3 frequency range slider
Calculate and show the suitable drivers button
I will email the database owner to find out if they are interested.
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OP
- Thread Starter
- #799
OP
- Thread Starter
- #800
Trouble with the neighbor's dog?
Not sure about that tuning btw, but do not think we tried a Linkwitz transform.
