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Old 12th October 2012, 10:11 PM   #11
Bigun is offline Bigun  Canada
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Whether the AN15 cast or the AN15 coax, it's a reasonably big outlay of cash so I understand why you'd like to choose the best option up front. Trouble is, I don't think enough folk on this forum have heard them both to offer you solid advice.

I've heard the AN15 and I don't feel a need for a super tweeter. Perhaps it's a case of you don't know what you are missing til you have had the chance to hear it but I don't feel rushed to go out and get one and then worry about how close I can mount it to the AN15 centre and what cross-over frequency it'll need and dispersion and all the rest. If I didn't think the AN15 would give me the treble I wanted, then I'd be tempted to consider the Coax. No diea how good the horn tweeter on the AN Coax is though.

There's a nice big speaker, one that may remind you of my recent Big'un, which uses a coax with horn tweeter by Hiraga - if you are looking for some inspiration.
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Old 12th October 2012, 11:14 PM   #12
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I have not heard the an15.

Speaking on the an15, just because a driver can go up there or measure up there, doesn't mean it does it well (break up modes helping it seem like it goes high). And the dispersion of adding a supertweet will be helpfull for those off axis or in the back of the room.

I for one like a squeek of boosted high frequency, more of the fletcher munson curve (or loudness button) helpfull for low volume listening.

With the griffin jordan project, most preferred adding a ribbon at 5khz 12db crossed (I think, can't remember if jordan run wide open) compared to just having the jordan driver. There are times I love my piezo crossed in at 5khz with a 6.5" that shuts off at 5khz, very nice air and astonishing detail, really hearing into the fake reverb. Better intelligibility than any 2khz crossover, but a pair of 4" full rangers (in 1 box) did it even better. But the full rangers couldn't do high cymbals very well. I have not compared crossing in the piezo with/without using a full range driver.

I think your biggest decision is if you want the an15 or the an15 coax.
People love their tannoys probably because of the "point source".

I don't like the idea of the massive phase shift at 2khz that coax's have.
And improperly loading a compression driver is a bad idea (a 2" tube, barely any flare, and horrible mouth termination).
But it can be a welcome improvement to detail, distortion, and dispersion but your intelligibility will suffer.

It all depends on what you think sounds best.

Norman

Last edited by norman bates; 12th October 2012 at 11:17 PM.
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Old 13th October 2012, 04:38 AM   #13
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I think i probably started the thread with a wrong footing. I probably should have used the term an 15 and a supertweeter instead. I would have been using the an15 full range and a tweeter to help up above 10khz. The other part i also neglected to mention is i would probably be using a home built f2j.

When i first got my seas fa22 i played it for quite a while before adding in the supertweeter. After that i couldn't get used to the sound without the supertweet.

That is why i am pretty convinced that i most likely need a supertweeter. For most people what they see is an extension of the hf frequency response. But what i think makes the difference is the handling of low level treble. These are much lower than 1 watt. More likely 1mW. If it produces 95db, then at 10mW it would be 75db. Which is still very loud. Which is why i guess the low level detail treble are more likely to be 1mW.

I have actually asked davis dicks on his opinion on the 2 speakers. Although the compression driver is coaxial i really don't know how it will perform in terms of sonic characteristics as a supertweeter. And from what i have been reading so far, they tend be higly directional. Which is the opposite of what i was looking for. High dispersion in all angles.

Very likely i would be getting the supercast 15. Then later figure out if i want to have it crossed at 10khz to the tweeter or just run it fullrange and fix in a supertweeter...

Oon
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Old 13th October 2012, 09:07 AM   #14
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I would suggest the AN 15. Add as you need or have a desire to. You could use it as a nice midbass in a 3 way if you dont like it FR, but if my experience with large diaghram drivers hold tru, you will love it.
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Old 14th October 2012, 07:37 PM   #15
Octavia is offline Octavia  United States
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I agree the Cast AN15 makes sense and since you already have the Mark and Daniels AMT why not just try it and see what you think. I for one would love to know what your findings are!
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Old 14th October 2012, 07:43 PM   #16
Octavia is offline Octavia  United States
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I agree the Cast AN15 makes sense and since you already have the Mark and Daniels AMT why not just try it and see what you think. I for one would love to know what your findings are!
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