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Old 1st March 2005, 08:33 PM   #21
Variac is offline Variac  United States
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If you are willing to pay more like $100 ea horn driver, this thread has some suggestions,i.e. BMS brand

http://www.diyaudio.com/forums/showt...614#post584614


I also have some
Selenium D205ti horn drivers I could sell if you are interested
They should be quite a step up from what you are considering-but who knows!
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Old 1st March 2005, 09:29 PM   #22
GM is offline GM  United States
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FYI: http://www.audioroundtable.com/HighE...ages/1834.html

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Old 2nd March 2005, 12:09 AM   #23
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Quote:
Originally posted by Variac
I also have some
Selenium D205ti horn drivers I could sell if you are interested
Mark,
I would be interested if the price is right. I have four and would like two more, to make a six pack.
I like six packs
Send me a PM
Cal
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Old 2nd March 2005, 02:27 PM   #24
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Thank you all for your replies,

As I said these are long range plans, I don't expect for my room to be complete for quite some time. This is good as I have plenty of time to prepare.

You have given me some nice ideas to consider The Seleniums look attractive to me as I can mess with them without breaking the bank.

Boy, I tossed and turned last night.. I was thinking about the possibility of building a horizontal straight sub bass horn into a lower portion of one of my walls during construction. I have a 'split level' home with the standard 'bookshelf' in the lower level. Maybe I can rob the 2x4 space and add a little more.This with the mouth eminating FROM a corner of the room. I wonder if this would work as 'corner loading', with the sound coming FROM the corner rather than firing INTO the corner?!? Any horn guys out there?

Maybe I can try to straighten out one of Bill Fitzmaurice's tuba 36's! HMMM... I could probably take it to 18 feet or so!

Regardless, any goofy idea idea I may come up with will be run by you guys first..

Thanks,
Marc
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Old 2nd March 2005, 03:31 PM   #25
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Building in an architectural horn during construction is definitely the way to go and planned well can take up little or no living area. Forget about a short compromised horn and do it right.
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Old 2nd March 2005, 05:17 PM   #26
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Quote:
Forget about a short compromised horn and do it right
John, I am curious as to what you would consider 'right'. I am looking for high efficiency and low distortion.

I don't want to spend a mint on a bunch of IB woofers either. I think IB would make too much noise in the rest of the house. This is very early planning, as I say.

Marc

Reviewing your post, you like the horn idea. Any good examples or sources of info on the subject?
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Old 2nd March 2005, 05:43 PM   #27
tiroth is offline tiroth  United States
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You may want to talk to these guys once you know what you are doing acoustically. They appear to be experts in soundproofing and decoupling walls. I would think both IB and horns could seriously rattle the walls they are installed in if they aren't done right--some of the products these guys sell might help.

http://www.soundproofing.org
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Old 2nd March 2005, 08:11 PM   #28
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If you really need the high efficiency then a bass horn is the way to go but you should take into account the extra distance from the point source. For IB, the ideal placement is in the attic. Then the back wave sound is absorbed by your insulation and the weight of your roof. I had concerns of bass disturbing the neighbors and the IB guys have said it's really not a factor. With regards to the rest of the house high output bass is going to be a problem no matter what unless you go dipole.

With regard to vibrations IB has a big advantage over everything else because you would use a manifold that completely cancels out all mechanical vibrations and you can use the distortion reduction benefit of push/pull. If don't need absurd output then 2 relatively economical 15's per side will give you great low distortion output. Assuming the sub uses a separate amp, efficiency isn't really of great importance and the simplicity of the build and stealthy installation make IB a great option if you have an attic or basement to use as your "box".

If you want to go for built in horns, don't let me discourage you. Choose an appropriate driver and build your horn specifically for it. Unfolding a small box horn just isn't going to be optimum because it is likely to have compromises in throat area, horn length and/or mouth area. You are subject to the same restrictions.
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Old 2nd March 2005, 08:46 PM   #29
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Greets!

Note that just like any other sub system it needs to be tailored to the room's response, so unless the room is quite large and/or open the horn need not be all that big, especially if the mouth terminates at an acoustically rigid corner apex, plus it can be foreshorten by using multiple drivers. Or if no corner is nearby, you can shorten it by using a plug/slot loading to mass load it.

Really though, with the latest crop of semi-reasonably priced, high Xmax, low distortion drivers and cheap mega power amps, why bother? Spacing relatively small sealed cabs loaded with <20Hz Fs drivers evenly across the front of a room will act as an infinite line source and they can be taken with you, sold, whatever. A built-in horn OTOH........

GM
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Old 3rd March 2005, 05:18 PM   #30
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Thanks guys,

Quote:
Really though, with the latest crop of semi-reasonably priced, high Xmax, low distortion drivers and cheap mega power amps, why bother? Spacing relatively small sealed cabs loaded with <20Hz Fs drivers evenly across the front of a room will act as an infinite line source and they can be taken with you, sold, whatever.
YUP,Good point. The only caveat is that those Adcom 555's I have kickin' will be sold to fund some of the project. You see, the WAF has 2 angles. Not only can I not take up too much space, but also I cannot dip into regular funds! This even though there is excess in there. Well, I guess I could but I don't wanna hear it!

As far as sealed cabs go. I agree it's tough to beat the sound quality and simplicity. The problem is that it bores me to death. In my 12 years in pro car audio I probably built 1000 sealed boxes

Funny thing I wanna use a coax for the top, considering.

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