Very interesting graphs Frank.
Especially the near flat impedance plot well into the higher octave.
Especially the near flat impedance plot well into the higher octave.
Hi Frank,
Can you post the impedance with Ryu spiders? I wanna see the results you got. What is the fs?
Can you post the impedance with Ryu spiders? I wanna see the results you got. What is the fs?
Reading the last few post I realised that they can be miss read, Hentai did not make any mistake with the spiders he made for me I simply gave him the wrong data. Just needed to clarifier that.
I did a mistake saving the files when I made the test on the spiders so I can't post them, but I believe the Fo was around 72 Hz with Hentai's spider.
Take care
I did a mistake saving the files when I made the test on the spiders so I can't post them, but I believe the Fo was around 72 Hz with Hentai's spider.
Take care
Too bad you dont have the files anymore. Perhaps you can use the spiders again and measure again.
The reason i want to see it is to check if for certain spider diameters i get any ringing. If the spokes are rattling or any of such phenomena. I thought about it but so far i wasnt able to detect it and your data would've been helpful.
If it is present than it can be defeated by adjusting the number of spokes and their distribution around the center.
Regards
The reason i want to see it is to check if for certain spider diameters i get any ringing. If the spokes are rattling or any of such phenomena. I thought about it but so far i wasnt able to detect it and your data would've been helpful.
If it is present than it can be defeated by adjusting the number of spokes and their distribution around the center.
Regards
Hi,
I got my Omnimic system and some time to play around. I did a frequency sweep and it looks mighty good, the unit reach well over 20KHz.
I do have some questions..... How can I be sure the response and distortion of the sound card is not interfering the measurements.
And here it is....
I got my Omnimic system and some time to play around. I did a frequency sweep and it looks mighty good, the unit reach well over 20KHz.
I do have some questions..... How can I be sure the response and distortion of the sound card is not interfering the measurements.
And here it is....
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Not familiar with Omni Mic, but it is normally done with a loopback cal of the soundcard.
Greebster is right, most software have a calibration factor. The other thing you can do is to determine the best level to measure with your system in order to reach maximum S/N ratio.
I waited to see how many will jump on a possible group buy. So far 3 users expressed interest. This is too few to think about such action but until more will be interested users can contact me in private if they want more.
I waited to see how many will jump on a possible group buy. So far 3 users expressed interest. This is too few to think about such action but until more will be interested users can contact me in private if they want more.
I added a new sheet to the phase plug xls to calculate dimensions for a 44mm phase plug with constant acoustic path length this time.
Also added AxiDriver baffle input. You will need to created your own baffle depending on how your compression driver is.
There is still much to be done but i will update it along the way.
Also added AxiDriver baffle input. You will need to created your own baffle depending on how your compression driver is.
There is still much to be done but i will update it along the way.
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Maybe placing your product under your signature (stating the name) and the link. I don't know what that is, but I know you were working in a field coil for a long time. 😕
Best Regards.
I will do a list with components so users can select what they want and either opt for a kit or ask to be assembled.
Looks good Frank, are they Gotos? 😀
Just kidding. You have a woofer/sub plus a 2-Way or similar? 🙂
Thanks Indutor,
I use a Audio pro acer 3 sub. The rest of the frequency is taken care of by the feild coil fullrange.
I use a Audio pro acer 3 sub. The rest of the frequency is taken care of by the feild coil fullrange.
Extra ring on the outside to prevent air leakage. But what is more interesting on this experiment is the sound of the kevlar. Did some test and compare it with paper cones. More ridgid but not with the epoxy sound of the previous attempt. What did the trick is to apply wax on the surface 🙂 and the use of almost none epoxy like i said before (prev. post)
14gr for the whole cone and voicecoil (the whole moving mass). Sounds like a full range driver for the moment. Now i understand why you guys must have a full range driver🙂
Another thing i found out. Only have one resonance peak at 2Khz without the surround. So the surround must have something to do with it.
cheers,
14gr for the whole cone and voicecoil (the whole moving mass). Sounds like a full range driver for the moment. Now i understand why you guys must have a full range driver🙂
Another thing i found out. Only have one resonance peak at 2Khz without the surround. So the surround must have something to do with it.
cheers,
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Hey, Jef
Looking good... But why did you invert the cone, I can not find any reason to do that?
Yes full range units are special, I started to experiment with full range... And then I was hooked.
The peak a 2KHz is that in Impedances wise or the frequency response.
Keep up the good work.
Looking good... But why did you invert the cone, I can not find any reason to do that?
Yes full range units are special, I started to experiment with full range... And then I was hooked.
The peak a 2KHz is that in Impedances wise or the frequency response.
Keep up the good work.
Hi Frank,
I'm making a radial loudspeaker. That is why it is a dome and not a cone. The whole driver is build around that idea (but did first some tests with a normal cone to compare). small magnet structure (dia.60mm) so the magnet sits "in" the cone and not under the cone otherwise the former would be to long, no spider also the spider would be to large to fit in. The advantage of a radial speaker is the 360 degree radiation and therefore a high freq. response is desirable. The peak is only impedance plot.
article about radial speaker:
DECWARE - Article on Direct vs. Reflected Energy
cheers,
I'm making a radial loudspeaker. That is why it is a dome and not a cone. The whole driver is build around that idea (but did first some tests with a normal cone to compare). small magnet structure (dia.60mm) so the magnet sits "in" the cone and not under the cone otherwise the former would be to long, no spider also the spider would be to large to fit in. The advantage of a radial speaker is the 360 degree radiation and therefore a high freq. response is desirable. The peak is only impedance plot.
article about radial speaker:
DECWARE - Article on Direct vs. Reflected Energy
cheers,