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Multi-Way Conventional loudspeakers with crossovers

The "Elsinore Project" Thread
The "Elsinore Project" Thread
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Old 15th August 2019, 02:08 AM   #2521
BeanAnimal is offline BeanAnimal  United States
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Originally Posted by ashaw View Post
Hi BeanAnimal.

The construction documents are on Joe's website. The crossover is on the front page, and the cabinet drawings are linked from the index.
Iím must have missed them on the page,, maybe looking too hard. Will go look again.
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Old 15th August 2019, 02:11 AM   #2522
Joe Rasmussen is offline Joe Rasmussen  Australia
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I will try to post that graphic that shows to difference between NRXC and MFC version of EL-6:

Click the image to open in full size.

Red is NRXC and Blue is MFC.

I have now been living with the MFC for at least a month and quite pleased with it. The change in driver is not a downgrade in performance and to my ears works just as well. I have a bias for fibre cones and went with the NRXC originally, but I have always appreciated a top quality Polycone driver, neither is perfect and both have their advantages.

I have to use the MFC Polycone version, as I get visitors who wants to listen to something that is available, so I have no choice - but I don't feel cheated either, that I now have to do with the second-best driver. It has not worked out that way at all. So I feel quite pleased and the Elsinore Mk6 marches on.

PS: The graphic above works - for the computer techies out there, I had to get an SSL Certificate, that solved the problem of new posts, but not the older ones. I hope there is someone that can help me out with that.
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"Elsinore Project" DIY Speaker System
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Last edited by Joe Rasmussen; 15th August 2019 at 02:13 AM.
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Old 15th August 2019, 03:05 AM   #2523
BeanAnimal is offline BeanAnimal  United States
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Quote:
Originally Posted by Joe Rasmussen View Post
PS: The graphic above works - for the computer techies out there, I had to get an SSL Certificate, that solved the problem of new posts, but not the older ones. I hope there is someone that can help me out with that.
What exactly do you need help with? It (IT) is what I do for a living
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Old 18th August 2019, 04:46 PM   #2524
dmcgown is offline dmcgown  United States
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Default Starting Construction!

Well, I started working on the cabinets for my Elsinores this weekend. Since only 1/2" and 3/4" MDF is readily available (Home Depot 2 miles away), I bought this material, rough cut the panels and now laminating them to the correct thickness. In preparation, I built a torsionbox clamping press to be able to keep even pressure across the panels during glueup, and it seems to be working just as planned. I will have to upload some pictures as it progresses further.

David
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Old 19th August 2019, 11:58 AM   #2525
pguerin is offline pguerin  France
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I'm selling a pair of Elsinore waveguide, the first oversion of the round waveguide made by Joe Wesseling :

FS : Pair of Elsinore speaker waveguide

They're as brand new !


BR Pascal GUERIN

Last edited by pguerin; 19th August 2019 at 12:00 PM.
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Old 20th August 2019, 01:21 AM   #2526
90TSIAWD is offline 90TSIAWD  United States
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Ive posted a BOM with shipping quotes and some other info a few pages back
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Old 22nd August 2019, 09:26 AM   #2527
celef is offline celef
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Quote:
Originally Posted by Joe Rasmussen View Post
I will try to post that graphic that shows to difference between NRXC and MFC version of EL-6:

Click the image to open in full size.

Red is NRXC and Blue is MFC.

I have now been living with the MFC for at least a month and quite pleased with it. The change in driver is not a downgrade in performance and to my ears works just as well. I have a bias for fibre cones and went with the NRXC originally, but I have always appreciated a top quality Polycone driver, neither is perfect and both have their advantages.

I have to use the MFC Polycone version, as I get visitors who wants to listen to something that is available, so I have no choice - but I don't feel cheated either, that I now have to do with the second-best driver. It has not worked out that way at all. So I feel quite pleased and the Elsinore Mk6 marches on.

PS: The graphic above works - for the computer techies out there, I had to get an SSL Certificate, that solved the problem of new posts, but not the older ones. I hope there is someone that can help me out with that.
Good to hear, have you done some distiortion testing as well?

I use both these drivers in some speakers i have, no Elsinore though, and i can not decide which one i like best. I think the Nrxc has a slightly crispier sound, but not by much, but Mfc measures better in some respects in my tests
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Old 23rd August 2019, 05:11 AM   #2528
Joe Rasmussen is offline Joe Rasmussen  Australia
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It seems that the old links are now working, thanks to Jason (the founder of diyaudio.com). It must have been done manually, so how about a hand (clap) for Jason.
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"Elsinore Project" DIY Speaker System
- "Don't take anything I say as an affirmation, but as a question." Niels Bohr [i.e. be humble]
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Old 23rd August 2019, 05:27 AM   #2529
Joe Rasmussen is offline Joe Rasmussen  Australia
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Quote:
Originally Posted by celef View Post
Good to hear, have you done some distortion testing as well?

I use both these drivers in some speakers i have, no Elsinore though, and i can not decide which one i like best. I think the Nrxc has a slightly crispier sound, but not by much, but Mfc measures better in some respects in my tests
Yes, I would go along with that comment. As far as distortion is concerned, I have done tests on individual drivers in the past, but I have not compared NRXC and MFC in that regard. But they are clearly very good. Where I have paid most attention in the overall design, that comes to the tweeter. To me that has often been the Achilles Heel. I have done comparative tests on the HDS tweeter versus a top-of-the-line Scan-Speak tweeter (the HDS is also made by Scan-Speak, but that was not well-known then).

Take a look at this link:

LINK: TWEETER COMPARISON

The Waveguide and the use of the null technique, ensures very low distortion of the tweeter, along with the Waveguide. I use the Waveguide to lower distortion, where other use it to extend bandwidth and cross over at a lower frequency. I resisted that temptation, I wanted less distortion, period!

The use of a single inductor on the other drivers, here I am willing to trade imperfection, in order to keep the current straight and also because a single inductor suppresses the internal non-linear inductance of the driver. But clearly, to be able to do that you have to be very driver selective.

It's been near twenty years ago that Lynn Olson (who has agreed that we have some similar approaches) wrote the article, link below. It is quite long and very detailed, but still surprisingly current and applicable to even today.

LINK: The Family of Direct Radiators by Lynn Olson

For those interested, that will keep you occupied for some time.
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"Elsinore Project" DIY Speaker System
- "Don't take anything I say as an affirmation, but as a question." Niels Bohr [i.e. be humble]
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Old 23rd August 2019, 06:38 AM   #2530
mbrennwa is offline mbrennwa  Switzerland
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The "Elsinore Project" Thread
Quote:
Originally Posted by Joe Rasmussen View Post
I will try to post that graphic that shows to difference between NRXC and MFC version of EL-6:

Click the image to open in full size.

Red is NRXC and Blue is MFC.
That may be a silly question, but what does this plot really show? I assume it's some kind of SPL, but... anechoic? In-room? At which drive voltage? Where's the microphone (distance, level, on/off-axis)? Why is it "stepped"?
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