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Multi-Way Conventional loudspeakers with crossovers

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Old 31st January 2013, 07:58 PM   #2241
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Truly gorgeous set you have there - that 4-way looks like it means business!
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Old 1st February 2013, 03:28 AM   #2242
navin is offline navin  India
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Quote:
Originally Posted by Mixon1 View Post
The material is oak veneer on 30mm MDF

Dynaudio Finale, Dynaudio T330D Esotar, Dynaudio D54, Audio Technology 7", Dynaudio 30W100XL, Dynaudio 30SL (new slave, changed from Peerless)

Dynaudio Twynn, as center. Dynaudio T330D Esotar, Dynaudio 17W75XL

Dynaudio Xennon 3, Dynaudio T330D Esotar, Dynaudio D76, Dynaudio 24W100

Dynaudio Xennon 2, Dynaudio T330D Esotar, Dynaudio 24W75XL
Simply fantastic. Really. I assume you used translam for the cabinet's curved side walls. I have not seen these drivers since the late 80s. At that time I too had made small monitors using the 17W75XL and the then new D260 (which replaced the famous D28af) and floor standers using the 24W100, 17W75XL, D54af, and D21af.

Does Dynaudio still sell to DIYers? I thought they had stopped.

Just a few questions.

a. Why not use the same mid woofer as used in the centre in the left and right speakers? Also why did you used MTM for center instead of W-MT-W?

Front/Right: Dynaudio T330D Esotar, Dynaudio D54, 24W75XL, Dynaudio 30W100XL, Dynaudio 30SL (new slave, changed from Peerless)

Dynaudio Twynn, as center. Dynaudio T330D Esotar, Dynaudio D54, 24W75XL

b. How is the D54 vs the D54af. The D54af is a few db less sensitive but has a flatter off axis and on axis response.

BTW on post 39 below you can see my current systems.
http://www.audiocircle.com/index.php?topic=110639.20
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Last edited by navin; 1st February 2013 at 03:30 AM.
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Old 1st February 2013, 03:33 PM   #2243
Mixon1 is offline Mixon1  Sweden
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Thanks for your kind reply, Sirius815 and Navin!

Dynaudio stop sell speaker drivers to DIYpeople at late 90's. That's why I had to collect drivers for about two years, and got lucky to find most drivers brand new, or sparely used.

The "Finale" was designed for Dynaudio 15W75, but I did not find any, at the time, however, I found a couple used Audio Technology 7" which I thought was better suited.
I believe they are significantly better than Dynaudio 24W75.
About the center, yes, You are right, It's little tiny:-) And I am planning to build a new center with "W-M-T-T M-W" config. = 2xAudio Technology 7", 2xD54, and 2xT330D.
The A-T 7" are easy to find new (only $1500 for a pair..) but the D54 and T330D are more difficult to lay hand on, in good condition. OK, I'm not in a hurry..

Sorry, but I have not compared D54/D54AF so I'm not sure.

Navin, really nice speaker build, by yourself! Thanks for sharing!
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Old 2nd February 2013, 03:23 AM   #2244
navin is offline navin  India
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Quote:
Originally Posted by Mixon1 View Post
And I am planning to build a new center with "W-M-T-T M-W" config. = 2xAudio Technology 7", 2xD54, and 2xT330D.
The A-T 7" are easy to find new (only $1500 for a pair..) but the D54 and T330D are more difficult to lay hand on, in good condition. OK, I'm not in a hurry
WHy not go W MT W using 2 7" and only a single mid and tweeter. Most of the power requirements are beloow 500hz anyway and 2 7" will have enough excursion (SPL capability).
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Old 2nd February 2013, 04:55 AM   #2245
Mixon1 is offline Mixon1  Sweden
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Well, I'm have been thrilled by this little beauty:
Click the image to open in full size.
And I want something like that, but with my own twist, with curved sides and other drivers.
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Last edited by Mixon1; 2nd February 2013 at 04:57 AM. Reason: Pictere problems
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Old 2nd February 2013, 05:40 AM   #2246
navin is offline navin  India
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I am wary of lobing. I am sure Dynaudio must have employed some fancy crossover to compensate for the lobing but most of us regular folk do not have access to the equipment companies like Dynaudio do.
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Old 2nd February 2013, 06:32 AM   #2247
Mixon1 is offline Mixon1  Sweden
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I.m not sure what you meen with "lobing"? Loop?
Well, I know the crossover will be a challange, but that's the fun part of it, is'nt it?
I have spent years to calculate crossover and study (by my self) to get the best performance out of it, and I will never be fully trained, but still, I do my best.
So, yes, IF I build the "optimal" center speaker, I have a lot of hard work to do.
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Old 2nd February 2013, 02:51 PM   #2248
Face is offline Face  United States
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An optimal center speaker would be a tower that's timber matched to your mains. Or if space is a concern(which it usually is), the tweeter and mid should be on the same vertical axis to prevent lobing.

As for Dynaudio employing some fancy crossover to prevent lobing, I wouldn't be surprised if they didn't bother... Just because it's a high end manufacturer making the product, doesn't mean it's perfect or even sounds good.
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Old 2nd February 2013, 04:08 PM   #2249
Mixon1 is offline Mixon1  Sweden
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Ah, now I understand what you mean with "lobing", thanks Face!
It's easier to calculate the crossover with D and M on vertical axis, and at the same time prevent lobing, am I'm right?
If so, it's maybe better to planning like this:
Click the image to open in full size.
But instead of the lower tweeter place a mid. like D54 and two 7" as woofer like Navin suggested!?
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Old 2nd February 2013, 04:50 PM   #2250
Face is offline Face  United States
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Quote:
Originally Posted by Mixon1 View Post
But instead of the lower tweeter place a mid. like D54 and two 7" as woofer like Navin suggested!?
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