Ehm just your own measurements compared to these Klippel measurements?
Not really sure what you're asking here?
Even with a fixed setup, it's really tricky to get consistent results.
If you just have a mic on one of those mic-stands, forget about it above 8kHz or so.
Well that sounds very dramatic, with that I mean you will find differences in the ±1dB ballpark.
cough Wilson cough
The response irregularities tend to fill in to the sides, apart from crossover irregularities, so the power response is not as horrid as the on-axis response might indicate. However this indicates considerable error in diffraction control, no surprise when you look at all the reflecting surfaces and hard edges around the drivers.
Toole's first AES papers on the subject came out almost a half century ago. Supposed professionals have no excuse for ignorance.
Ehm just your own measurements compared to these Klippel measurements?
Not really sure what you're asking here?
I'll post them when the speakers arrive and I measure them.
When I switched to a 4 ohm woofer after the first prototype was sent to Erin, I put all those measurements in a folder called "archive". I think I deleted it because I didn't need it anymore and didn't want a bunch of clutter. I'm trying to find the screenshot I took of the comparison. And now I'm realizing that since the last measurements from Erin may not have had the newest XO settings activated, but I'm not sure, I can't even compare to my current measurements And the speakers are already back at my house. I'll look through imgur and see if I uploaded it there.
And the speakers are already back at my house. I'll look through imgur and see if I uploaded it there.Some similarities to our comparison: https://www.audiosciencereview.com/...-how-the-klippel-nfs-works.13139/post-1371581
You can set the distance to calculate the far field to in the Klippel software. This can get rid of some of the differences.. for example if you do your normal measurement at the usual 1m distance, but have the NFS set to calculate to 10m distance.
I don't trust the NFS in the low frequencies yet. I am aiming to do a proper tower measurement (~6m height) to be able to compare the NFS to true 4pi.
Whoops, happens to all of usWhen I switched to a 4 ohm woofer after the first prototype was sent to Erin, I put all those measurements in a folder called "archive". I think I deleted it because I didn't need it anymore and didn't want a bunch of clutter. I'm trying to find the screenshot I took of the comparison. And now I'm realizing that since the last measurements from Erin may not have had the newest XO settings activated, but I'm not sure, I can't even compare to my current measurements
No worries, just take your time, I was just curious
very unfortunate that they didn't add a demodulation ring.
If you look at how well the 8inch fullrange PFC performs.
With optimizing with different types of window functions you can probably get even lower.
Last week I was able to pull of 100Hz = 10ms
That doesn't give much more detail below 300Hz, but at least gives a bit more frequency resolution.
Hopefully soon I can experiment with a sort of damping cage around the setup.
I have done already some preliminary experiments and it looks very promising
Last week I was able to pull of 100Hz = 10ms
That doesn't give much more detail below 300Hz, but at least gives a bit more frequency resolution.
Hopefully soon I can experiment with a sort of damping cage around the setup.
I have done already some preliminary experiments and it looks very promising
I mean 6.8ms at 2m.
I use Blackman Harris window function. I've tried the others but haven't seen anything that would make me switch.
BTW, anyone use both the SB26STAC and SB29SDAC? If you have mention if you used Fs compensation. I considered using the SS 8330 with the SS Discovery woofer, but I haven't made a waveguide that I like yet for it.