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Old 5th February 2009, 04:24 PM   #41
tinitus is offline tinitus  Europe
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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
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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.
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