Hello, I hope you are keeping well.
Just a quick question regarding adding a flare to a recommended port size.
I am designing a 2 way speaker. I've got some rough figures (need to do some tinkering but wanted to get my head round this part first) for the sim.
VB = 9L
Tuning freq = 55hz (do plan to try get it lower later on, just experimenting atm)
Vent diameter 2 inches
Vent length 186mm (again, know this may be a squeeze, haven't finished tinkering)
Unfortunately around the 30 - 50z region, my air port velocity just exceeds 18m/s. I was reading how if you flare a port, you're good aslong as it doesn't exceed something around 36 m/s (cant remember exact figure)?
Therefore, I was just wondering how you go about adding on a flare to the suggested port length winisd has given you ? Do you obtain half the flare radius and subtract from length of port if that make sense?
I know this a nooby question and I may be missing something blatantly obvious. I had a go on flare it with no success. I really do appreciate any response, even if its stating something simple. I'm completely new to speaker designing, not the best at this sort of stuff but always up for trying new things.
All the best
Have a great weekend folks 😀
Just a quick question regarding adding a flare to a recommended port size.
I am designing a 2 way speaker. I've got some rough figures (need to do some tinkering but wanted to get my head round this part first) for the sim.
VB = 9L
Tuning freq = 55hz (do plan to try get it lower later on, just experimenting atm)
Vent diameter 2 inches
Vent length 186mm (again, know this may be a squeeze, haven't finished tinkering)
Unfortunately around the 30 - 50z region, my air port velocity just exceeds 18m/s. I was reading how if you flare a port, you're good aslong as it doesn't exceed something around 36 m/s (cant remember exact figure)?
Therefore, I was just wondering how you go about adding on a flare to the suggested port length winisd has given you ? Do you obtain half the flare radius and subtract from length of port if that make sense?
I know this a nooby question and I may be missing something blatantly obvious. I had a go on flare it with no success. I really do appreciate any response, even if its stating something simple. I'm completely new to speaker designing, not the best at this sort of stuff but always up for trying new things.
All the best
Have a great weekend folks 😀
You may have to make a bit of a guess. The usual way this goes is to measure the tuning after you install the vent (even when a flare is not used). This will give you the information you need.
Just running it through some software. Results can be seen here:
port quest - Album on Imgur
When putting in my parameters, as seen, precision port recommends 7.5 inches, but for a 2 inch port it recommends subtracting 5 inches from the center tube. That would leave me with a 2.5 inch port, which seems very small?
Also, with the winisd step graph results, will them resonances be audible? 🙂
Thankyou in advance
port quest - Album on Imgur
When putting in my parameters, as seen, precision port recommends 7.5 inches, but for a 2 inch port it recommends subtracting 5 inches from the center tube. That would leave me with a 2.5 inch port, which seems very small?
Also, with the winisd step graph results, will them resonances be audible? 🙂
Thankyou in advance
Is this suggesting to cut the centre tube down to 2.5 inches (7.5 - 5 inches), or is it suggesting to subtract 5 inches from overall length of the tube (11 inches) which leaves me with 6 inch centre tube?
I didn't realise imgur was cutting the bottom off that screenshot until today. Even so there still isn't enough information to know what it means. Try comparing it to a known standard port calculator as a reality check.
Hey, there's not actually anything important cut off the screenshot, unless your device has cut something off.
WinISD suggests 6.4 inch port length (no flares)
But precision port is suggesting 7.5 - 5 inches = 2.5 inches? If this is the case I didn't realise so much of the flare length was that effective.
Thankyou
WinISD suggests 6.4 inch port length (no flares)
But precision port is suggesting 7.5 - 5 inches = 2.5 inches? If this is the case I didn't realise so much of the flare length was that effective.
Thankyou