Is this 3" dome sounding good ?

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#41
In fact I want make it KISS because it will be not a main speaker, but I would like it near a Full range in the mid-treble, that's why the linked drivers in my first post !

How to kill sweet spot issue with a planar around the sensible Fltecher Mundson aera and due to vertical lobbing of the plannar (longer than widhter) ? I assume yes some sucess to do it ?!

In my head it would be simplier (without knowing as no expert myself just an enthusiast) with domes for smooth roll off !
 
#43
Eldam said:
How to kill sweet spot issue with a planar around the sensible Fltecher Mundson aera and due to vertical lobbing of the plannar (longer than widhter) ? I assume yes some sucess to do it ?!
Click to expand...

Horizontal is much more crucial to imaging and sweet spot, unless you are an hyperactive guy constantly standing up and down. Horizontal issues might even not allow you move your head.
 
#44
GDO said:
Horizontal is much more crucial to imaging and sweet spot, unless you are an hyperactive guy constantly standing up and down. Horizontal issues might even not allow you move your head.
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Indeed, the extremely wide dispersion of ribbon tweeters is part of what gives them such a lively sound - the other factors being good transient response, and often strong harmonic distortion ("sparkle"). Tall/thin ribbons are more at home in a 3-4 way since its hard to cross them low enough to avoid distortion AND have full dispersion in both drivers at the crossover freq. That is why you often see ribbons paired with a small (usually dome) midrange.

BTW, I have run into issues with different sitting heights with ribbon tweeters. Chair vs. couch can be noticeably different. A 3/4" dome or ring radiator is easier to work with.
 
#45
The average ribbon is no better in horizontal dispersion than the average 1" dome tweeter. It comes down to simple physics - if you have a diaphragms of approximately the same width you are going to get approximately the same horizontal polar pattern unless you implement waveguides or phase shields.

Transient response is really no better for a ribbon than for dome when used sufficiently above Fs. Good transient response is the result of flat phase response (low Fs, low voicecoil inductance, lack of diaphragm resonances) and flat frequency response. Something like the XT25 will excel at this.
 
#46
TMM said:
The average ribbon is no better in horizontal dispersion than the average 1" dome tweeter.
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I agree that the ribbon witdth is the factor to consider. Here is the response of the RAAL 70-10, a 10mm ribbon. I think is clearly better than any 25mm or 19mm dome.

raal_70-10d-am-2.jpg


raal_70-10d-am.jpg
 
#47
I used to think long time ago ribbon tweeters were also better than dome
units and that was basically a belief that media was pushing to achieve
greater sales and I fell for it. Bought an expensive unit, had it for awhile,
until I accidentally tried another dome tweeter of high quality. It was a
Dynaudio D28/2. You know, the thing with measurements of both of the
units was that FR was looking just normal, no holes, no wiggles, nothing.
Everything OK, yet the ribbon was lacking details and the difference was
huge. I had tested it listening to Jean Michel Jarre "Oxygene". Funny stuff.
 
#48
GDO said:
I agree that the ribbon witdth is the factor to consider. Here is the response of the RAAL 70-10, a 10mm ribbon. I think is clearly better than any 25mm or 19mm dome.
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A 10mm ribbon is better than 19mm or 25mm dome, who would have thought?

The average ribbon/AMT seems to be about 1" wide, so it's pointless to point out that one that is unusually slim has better off axis performance than dome tweeters which are twice the diameter. Unusually small domes also exist and their off-axis performance is as expected.
 
#49
TMM said:
A 10mm ribbon is better than 19mm or 25mm dome, who would have thought?

The average ribbon/AMT seems to be about 1" wide, so it's pointless to point out that one that is unusually slim has better off axis performance than dome tweeters which are twice the diameter. Unusually small domes also exist and their off-axis performance is as expected.
Click to expand...

I was only saying I AGREE with you! What is pointless to me is this ******* wise guys posting competion ...:bomb:
 
#51
As the Tang Bang is out of the competition because its 100 units bulk :

always in the Morel Elite serie, this one looks good (T/S) too : Morel ET 448 http://www.toutlehautparleur.com/media/catalog/product/datasheet/morel/ET_448-8.pdf

good efficienty ! can permitt to take a higher efficienty PA driver below (800 Hz ?) to solve the bafle step loss !

Does a sealed 12" + 2" dome crossed around 800/1000 could work despite the huge Sd difference around the XO ? LR2 maybe ?

humm maybe Dangerous to XO where the bafle step is ending (around 600/800 Hz I assume for a 14" width front bafle!).... no to much 12" driver which efficienty is falling since 800 Hz to more !

(for myself : 😛 go active guy ! keep it KISS)

PS : as to say the dayton 2" aluminium dome looks good : I like the détails of metal (my main speaker is Al from 125 Hz to the top !) despite the bad peak around 14K !
 
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#52
Urk, my bad.... the Morel above Fs is 700 Hz... so in fact it is a tweeter as someone posted, not amidrange !

@ the people having the Dayton 2" dome aluminium : is it sounding smooth ot do you need to notch the upper 14 Khz break-up ,
 
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