Pearljam5000
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What's going on with all these so called "super tweeters" ?
Thanks I wrote all these ideas for future threads, it's hard thinking about them on my own.Ideas for more threads you could start:
- Do I need an infra sub?
- How much membrane do I need?
- Are two woofers better than one?
- Transmission line or bass reflex?
- Advantages of D'Appolito?
- Extra enclosure per driver?
- Wall mounting - yes or no?
- Why are there dipoles?
- MDF, wood or aluminum?
...
A solution looking for a problem.What's going on with all these so called "super tweeters" ?
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. Whether they do anything that couldn't be done by turning the treble knob up a smidge...
S.
Not a very specific question!What's going on with all these so called "super tweeters" ?
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Lol, I'll take that as a compliment weAmusingly, it occurred to me last evening to ponder what esoteric thread Pearljam5000 might start today, and "SUPERTWEETERS!" is actually what came to mind.
Great post, thanksNot a very specific question!
There are times that some of us need high sensitivity tweeters to put (literally and figuratively) on top of high sensitivity treble drivers with limited HF extension. My loudspeakers are one such example (OK -- two such examples).
Indeed I used a pair of Fostex T90A "supertweeters" for quite a few years. I also still have them, packed away for a rainy day. They are nice, non-piercing tweeters for high-sensitivity applications. They are not inexpensive -- but not bad, price-wise, when purchased used.
beta test
IMG_0340 by Mark Hardy, on Flickr
final configuration (used atop Altec 604E Duplexes)
071 by Mark Hardy, on Flickr
I have, in full disclosure, replaced them with decidedly less sexy, substantially less expensive, but quite competent (for my needs!) B&C DE35 compression tweeters. Note: 1) the configuration of the loudspeakers (and XO) 'below' the supertweeter has also changed markedly. 2) the mounting of the compression drivers and horn is not optimal
DSC_0144 (2) by Mark Hardy, on Flickr
Does this help any?
I used them in an industrial application long ago and can confirm the smooth and extended highs - we measured them past 70kHz. Not having any interest in crossovers at 5kHz and above at the time, I never listened to music through one of these; now I wish I'd picked up a couple.
I'd agree (FWIW) -- at least in principle. In practice "perfect placement is impossible given the range of wavelengths involved in audio!I'd think there would be a chance of timing issues and the possibility of even canceling high frequencies if they aren't placed perfectly, especially with multi-way speakers.
Actually Focal's berillyum sounds pretty good.I guess that's what the selling point of beryllium and diamond-dome tweeters are, for the supertweeter crowd to get a 2-for-1...
A solution looking for a problem.
As HD recordings have a frequency response nominally extending to 40+kHz, one's loudspeakers should also go to 40+kHz, even if we can't hear it!
Incidentally, all these supertweeters have significant output starting not much above 10kHz, so their effect is audible to most people, hence can't be accused of doing nothing. Whether they do anything that couldn't be done by turning the treble knob up a smidge...
S.
Complete with the generic Radio Shack crossover modules -- cool.Reminds me of one of my favorite threads at audioholics....
A pic from it for flavor
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The rag on the stick holding the woofer (more or probably less) in place is just an engineering marvelA pic from it for flavor