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Old 5th February 2009, 04:24 PM   #41
tinitus is offline tinitus  Europe
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Quote:
Originally posted by gainphile

Let's say a 11" effective diameter, it will start to beam at about 700Hz ?

Listening on-axiss it should be less of a problem

I would be more concerned about comb-filtering when crossing high to a tweeter

Some have tried to mount the tweeter in front of woofer
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Old 6th February 2009, 01:23 AM   #42
CLS is offline CLS  Taiwan
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Yes, it's indeed a 'problem' in such a distance.

I know this from my previous setup -- Oris 150 as mid horn + another tweeter horn. As the midhorn is 30" in diameter, and the tweeter horn is another several inches, so the c-c distance might approaching 20". The xover points I was playing were spreaded from 3k to 10kHz at those days... That's a huge separation for that frequency range.

I don't have thorough skills and equipment for precise measurements. By ears, the comb filtering does not bother me very much. I can hear the differences of standing and seated positions. And I aim for the seated one of course. That's OK.

I know I can't grab everything, so I take dynamics, tone correctness, textures as the top priorities. Imaging, 'sound field'... etc would be way down on the list.

After I dismentled the system based on Oris 150, I used 8" mid on OB + 8" HF WG for mid-high. That was a clear step-up in imaging. However I miss the dynamics so much more. That's why you read the 12" midrange story here....

When I changed the 8" mid to this 12" one, I did lose some of the imaging quality. But I can live with that and am very happy with the dynamics gain with this bigger cone. Well, that's for me.

Ideally, a bigger 'tweeter' which can play down to around 1kHz must be good. That has been one of my 'future' plans....
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Old 8th February 2009, 02:56 AM   #43
freddi is offline freddi  United States
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sure looks like fun - there should be more guitar speakers - I have an ancient University UC122 12" , fs ~100 - might have been lower when new, has nice mids and top in a Karlson Twelve without any "helper" tweeter - like an idiot I ripped the whizzzer shortly after this picture
Click the image to open in full size.
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Old 12th February 2009, 03:10 PM   #44
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CLS, any progress with spider mod?
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Old 13th February 2009, 12:21 AM   #45
CLS is offline CLS  Taiwan
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Thanks for your concern, but sorry, not yet, busy on other stuff....

On the other hand, actually I'm getting used to the sound as is. Not bad at all, really And it does not need any EQ now. I brought back some "life" by tuning the xover -- pulling up a couple of dB on the tweeter -- and it's working very well.

Will update here if any progress.
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Old 22nd July 2013, 03:41 PM   #46
Elias is offline Elias  Finland
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Celestion Heritage Series G12H(55) looks interesting.

Has resonance at 55 Hz which is lower than usual for 12" guitar driver.

High sensitivity, too.

Crossing below 2 kHz could potentially make a great midrange.
Attached Images
File Type: jpg 273369.jpg (51.1 KB, 124 views)
File Type: jpg 1600-G12H-HER558_detail1.jpg (353.4 KB, 126 views)
File Type: gif graph.gif (21.5 KB, 121 views)
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Old 26th June 2014, 10:08 PM   #47
ErnieM is offline ErnieM  United States
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I just tried the 10" eminence ragin cajun as a mid between 400 and 1300hz. Sounds much more open and transparent than my high sensitivity low mass 12" PA driver in the same range...

Can someone shed some light as to why? The 10" has nasty looking csd's compared to the PA driver yet it sounds smoother and cleaner. I don't understand.
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Old 26th June 2014, 10:26 PM   #48
Elias is offline Elias  Finland
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Quote:
Originally Posted by ErnieM View Post
I just tried the 10" eminence ragin cajun as a mid between 400 and 1300hz. Sounds much more open and transparent than my high sensitivity low mass 12" PA driver in the same range...

Can someone shed some light as to why? The 10" has nasty looking csd's compared to the PA driver yet it sounds smoother and cleaner. I don't understand.

Hi,

What is the model of the PA driver you compare with ?

Explanation... I would also like to find out. Maybe we can start out by comparing measurements of the two at first ?


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Old 26th June 2014, 10:56 PM   #49
ErnieM is offline ErnieM  United States
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The model is eighteen sound 12MB700 but I also have others laying around. I'll have to do some more comparisons but I know none of the PA drivers match the guitar driver in clarity.

I'll get some measurements up as soon as I can.
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Old 26th June 2014, 11:32 PM   #50
ErnieM is offline ErnieM  United States
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On a side note, I've noticed several well regarded mid-woofers have a similar purple tint as seen on the ragin cajun.

Those 8" cones look exactly the same to me...
Attached Images
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File Type: png pe21.png (34.4 KB, 15 views)
File Type: jpg m400.jpg (8.0 KB, 19 views)
File Type: gif beyma-liberty.gif (24.4 KB, 15 views)
File Type: jpg rajun cajun.jpg (4.6 KB, 12 views)

Last edited by ErnieM; 26th June 2014 at 11:35 PM.
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