A real novelty!!
You have to explain more to the people about the midrange arrangement.
Russian
http://igolkin.com/forum/viewtopic.php?t=58&sid=4f9cf219264cc7e24b7ca804b50df9a4
This might interest you 
http://www.diyaudio.com/forums/multi-way/180301-lq-osd-acoustic-alternative-5.html#post2515343
http://www.diyaudio.com/forums/multi-way/180301-lq-osd-acoustic-alternative-5.html#post2515343
I just finished these. A pair of Eminence beta 12 LTAs and a beta 15.
For now I have a dome tweeter propped up next to them. I'm still up in the air on what tweeter to use for real. Open to suggestions.
These drivers were unlistenable when they were new. About 6 months of playing every day in the shop has transformed them.
evan
For now I have a dome tweeter propped up next to them. I'm still up in the air on what tweeter to use for real. Open to suggestions.
These drivers were unlistenable when they were new. About 6 months of playing every day in the shop has transformed them.
evan
Attachments
Interesting.
http://www.diyaudio.com/forums/multi-way/204444-photoshoot-ob-mk1-least-they-sound-good.html
http://www.diyaudio.com/forums/multi-way/204444-photoshoot-ob-mk1-least-they-sound-good.html
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Thank you, but rather not: the material is of highly explicit nature
.Skipped recently highpass from full ranges, power amp driven directly from preamps outputs. Another pair of pre outs is still feeding active XO to subs and Audax PR130 tweeters. ( rear. )
It's just amazing how much one single box can mess up things- that active XO, no matter how suppposedly well executed it is.
Looks to me like those three pairs of good quality full range units has a sufficient power handling, no more need to high pass.
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Finished my Notes a couple of days ago. They use the Acoustic Elegance IB15 in H-baffles instead of the originals XLS U-baffles. After some tinkering with the MiniDSP I got the basses tuned in. Needless to say, they sound awesome! I'm very happy how they turned out. Thanks JohnK for a fantastic design!
The top baffle.
And here's the complete left channel including the poweramp doubling as a base.
The top baffle.
And here's the complete left channel including the poweramp doubling as a base.
Oh my. Running two pairs of bizarre widebands with fs=26 hz, very low qt>0.3 and very high zmax 0.7k in parallel with a more normal third pair of high q, higher fs=45 hz seems to make more good to power handling and distortion as does any line level XO to the same first two pairs of drivers.
Of course, there's no substitute for paper area, but there must be also something else going on now.
I'm pretty much baffeled. Thank you, Thorsten, and thank you, a couple of local fellas, for suggesting this experiment.
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Back then, I ran in the issues with the drivers of first two pairs, as some digital recordings including probably unwanted subsonics- as also did badly set up analog rig, or seriously warped records, of course - made the drivers to exceed their linear excursion limit in most disturbing way, likely to cause serious damage to their pretty unexceptional suspension in days, I believe. I did not tried that.
Instead I tried pretty much everything else, and only not running them full range, with active xo cured that problem compeletely enough. But now, in parallel with third pair of dissimilar drivers: I'm tried my utmost and the bastards are virtually not moving at all, no matter what I play or how loud as long as I do not cut out that third pair- when I do, that compeletely uncontrolled cone flapping starts immediately.
Instead I tried pretty much everything else, and only not running them full range, with active xo cured that problem compeletely enough. But now, in parallel with third pair of dissimilar drivers: I'm tried my utmost and the bastards are virtually not moving at all, no matter what I play or how loud as long as I do not cut out that third pair- when I do, that compeletely uncontrolled cone flapping starts immediately.
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Good Luck, Jonasz !
So now all our IB15s are on class duty.
/Erling
Thanks!
The IB15 surely are fantastic drivers. Interestingly I just picked up two more used pairs this weekend!
Don't really know what to do with them though, maybe try a w-baffle or something similar?My Bastanis
HI all,
Just found this thread, thought might as well post my pair here. They are Bastanis Mandala kit with twin 12" widebanders , airforce dipole tweeter and 18" h-frame bass bin. 100db/1w efficiency
The twin 12" widebanders would be upgraded to the new Chrystal versions in a week or so, plus new 18" woofers.
Baffles and cabinets are built more or less to spec size using 1" baltic birchply, but added my artistic stuff on it. I thought they look good for baroque music
BTW, I am located in Hong Kong.
HI all,
Just found this thread, thought might as well post my pair here. They are Bastanis Mandala kit with twin 12" widebanders , airforce dipole tweeter and 18" h-frame bass bin. 100db/1w efficiency
The twin 12" widebanders would be upgraded to the new Chrystal versions in a week or so, plus new 18" woofers.
Baffles and cabinets are built more or less to spec size using 1" baltic birchply, but added my artistic stuff on it. I thought they look good for baroque music
BTW, I am located in Hong Kong.
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