Low level body/weight presence wanted: Can 12" full range deliver?

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#341
Nordic said:
No man Scott, we look up to you for clever designs.
Any chance of a metronome with these drivers?

Or is there a specific quality to these drivers that only make them suitable for those sqaure coffins?
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You're in trouble then if you think muggins here is a source of clever design...

AN12CF metronome? Easy enough if you have the space. 60in tall, So = 6in x 6in square, Sl = 20in x 20in square. Zdriver 30in. Vent in centre of the base, 4in diameter x 1in long. Stuff from the top 35in down, 0.5lbs ft^3 of dacron or similar. Another quasi prosound alignment to keep the LF damped -I doubt they'll be lacking.
 

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#344
Ah, thank you VanJerry. I got to meet Wayne a few months back (Lone Star Audio Fest) and he is an incredibly friendly guy with some very cool-sounding speakers. Brighter, beefier and they could play really loud, but very different from the single driver "midrange magic" fetish. Thank you for the link!
 
#345
VanJerry said:
Scottmoose doesn't believe BSC will be an issue in his design, especially with wall reinforcement - which I would expect to have in (over) abundance due to the small room.
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I have to point out here that neither would GM's original TL for that matter.

The other aspect that appeals to my inexperienced self is that the 3.5 ft^2 aperiodic damped vent BR provides some flexibility to go lower. Scottmoose has told me that the issue of running these drivers FR may not be so terrible except for HT (I presume at higher volumes.)
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Eh? Where did I say that? You need to keep in mind the context in which remarks are made.

Some (quite a lot) of people find FR drivers, especially large ones, OK for their needs sans any support, particularly at lower volume levels & on relatively undemanding material. But certainly not everyone, and as already mentioned, there are some types of music that are far more demanding than HT can be, particularly in quality terms.
 
#347
Yes, although FR units are not generally the first type of driver that comes to mind if you want bright, beefy & the ability to blow your walls out. The larger units & the odd exception like the Babb drivers get as close as you're likely to get IMO, given the somewhat conflicting requirements of trying to do all that with a single cone. FR drivers typically have a somewhat different set of priorities to units with a narrower operating BW.
 
#348
VanJerry said:
Only recently, after much reading, have I come to appreciate the value of relieving the driver, as GM describes it, of the majority of the high excursion BW when crossing closer to 80Hz. I feel I have no choice but to give up being able to cross my sub any lower than that. I was too idealistic about FR drivers... Or maybe "ignorant" would be the word.
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Originally posted by Scottmoose Post #322

No. Many users of FR units are quite happy with them run full range, with no support. Fine for some types of acoustic music for e.g., especially if you don't crank the volume up, but not ideal for your use.

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Which I took to mean not ideal for HT. But if OK for some music - not cranked up, I extrapolated to include some low volume HT as in "girl movies" which I get a lot around here and actually appreciate ...most of the time. 🙂

And keeping context in mind, I must say again, that I rarely play music loud at all. The loudest would be action movies and I'll bet though it seems loud to us, not half as loud as most would consider moderate.

However, that is me, and it's true - my comments may seem to misrepresent you Scottmoose - to the more typical user.


-jerry
 
#353
Grin, I like it when I get a firm Idea of what I want and find something that is pretty close 😀.

I see there is a Partition running down the centre, is this from front to back? i.e. two side by side open top and bottom pyramids?

About the AN-12's, I see the cast frame does not go so low... what is gained in exchange for it giving up the few Herz before the smaller models and non-cast 12"?
 
#356
Nordic said:
The dimentions for the cast 12 seems to have alot of even lenght sides i.e. 6x6 and 20 x 20, isn't this supposed to be "bad"?
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Ever see a cone? 😉 Well, this is a (mass loaded) conical horn.

About the AN-12's, I see the cast frame does not go so low... what is gained in exchange for it giving up the few Herz before the smaller models and non-cast 12"?
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Grand total of 3Hz in free-air resonance. Assuming the published specifications are correct. I wouldn't get too worked up about it. For a start, you're excessively unlikely to hear it. Then, 3Hz is well within typical sample variability. And finally of course, it's free-air resonance. How low in practice it will go depends on the cabinet.

I see you've added the dimensions to the Metronome Table Dave... that was fast. 🙂
 
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