You means Hiraga is deaf, because of too much moved air ????
Now imagine the same car, but with a roof... There should have some derogation to allow speedsters to be drived with headphones...(but when you are seated on the engine)!
Have any photograph of Papa younger on a skate-board ?
Now imagine the same car, but with a roof... There should have some derogation to allow speedsters to be drived with headphones...(but when you are seated on the engine)!
Have any photograph of Papa younger on a skate-board ?
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No all about Hiraga at the Fête à Noeud Noeud...
Sorry but paid enough money for RDS and NRDS for years, that's it and not feel the slighest nostalgy... Some of his issues stilled piled in the WC for rereading in these special moments... amd btw hope he enjoys public retirement ( sa retraite...) as diserved...
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With planars/ribbons/AMTs I'd be even more wary of the resonant mouth/exit to baffle diffracting back to the entry - more so as the diaphragm has less support (worst-case would likely be a pleated ribbon or an ESL, best case would probably be a planar like BG makes).
As long as the horn isn't very deep, I don't think a soft dome is going to behave much differently than a metal dome of the same design on the same horn.
While I initially started with compression drivers for HT (Home Theater in the late '80s), my experience is all over the place since then (domes, compression drivers, ribbons, planars, etc..) Again, though - my preference is pretty much with respect to the particular design goals, so there are occasions where I would happily say go for a compression driver vs that of a dome (..and have done so multiple times in this forum - perhaps the most obvious forum thread being: Beyond the Ariel.) I'm not at all against a compression driver Loudspeaker design.
I'm not sure I understand your question on Impulse response, but if I'm understanding you correctly: I think it's far to difficult to say - the rise and settling of any driver is product of many different attributes. (..on of the more important being the size/diameter of the driver with a harder diaphragm material in relation to a "soft" or "hard" break-up.)
-as far a dome tweeter: most are well behaved past 20 kHz - so generally I would NOT recommend inserting a traditional super-tweeter. (..now an "ambient" tweeter facing reward might be worthwhile depending on the overall design and room placement, and I've even done up-ward firing tweeters in deep horns with a very high freq. high-pass filter that presents little combing issues with the front dome.)
It was the choice to normalise EQ to a response measurement, I don't recall reading the explaination on how that was chosen.
I'm not fond of normalized polar plots either, he probably started doing it in Arta (which I believe used to default to that with certain plots like waterfall) and kept doing it for Clio (..though really this is with respect to just 2 of his projects, both using the same horn and compression driver). With the on-axis freq. response however, it's not difficult to extrapolate off-axis behavior and there is a lot of other information as well (including sim's that provide off-axis responses).
Most of his other projects have freq. plots off-axis that don't have normalization.
Agreed
My experience mirrors this.
I cannot comment on this objectively with measurements, but I can subjectively, with a comparison of my own.
A few years back, I built a good (supposedly) set of 3-way diy speakers using scan speak berillium tweeters ($500. each at the time). I ran them for over a year.
I then moved on to building some high sensitivity two ways using b&c de250's behind waveguides. These I still own.
Subjectively speaking, in my listening room, there was no comparison.
The compression drivers and waveguides present a much more realistic presentation. I'm saying hi-hats sounding like real hi- hats.
YMMV
My experience mirrors this.
I cannot comment on this objectively with measurements, but I can subjectively, with a comparison of my own.
A few years back, I built a good (supposedly) set of 3-way diy speakers using scan speak berillium tweeters ($500. each at the time). I ran them for over a year.
I then moved on to building some high sensitivity two ways using b&c de250's behind waveguides. These I still own.
Subjectively speaking, in my listening room, there was no comparison.
The compression drivers and waveguides present a much more realistic presentation. I'm saying hi-hats sounding like real hi- hats.
YMMV
Guess I'll add my 2 cents to this, agreed with johnnycamp5. My reasons for staying with a WG compression driver maybe a bit different than others here however......I like the sound of ribbons but everytime I have a crossover above 1khz as compare to without, the presentation gets pushed back further as compared with no crossover in that region. I like to think I can get at least a few crossovers correct but I've never liked the result as much.
The compression driver with WG seems to extend the presentation further behind my ears than a wider dispersion build and lower listening levels seem more enjoyable with the compression WG build. I like the mentioned presentation better than with a fullrange driver crossed lower than 1 khz so it's not simply the lowered crossover that does it for me, I'm guessing its all the above combined. The added change in presentation was a fantastic lucky bonus.
The audible differences are larger in my bigger room as compared with my smaller room so i'm guessing room has a lot to do with this.
Hi there,
In my experience, once you have tried Beyma AMT units, there really is no going back, and I have listened to some very nice compression drivers! Most tweeters of any type simply sound like gravel in tin foil by comparison, they are that effortless and clean, even flat-out.
Cheers, Carl.
In my experience, once you have tried Beyma AMT units, there really is no going back, and I have listened to some very nice compression drivers! Most tweeters of any type simply sound like gravel in tin foil by comparison, they are that effortless and clean, even flat-out.
Cheers, Carl.
Well, sure they have some good point for sure, but the vertical directivity is not constant and becomes quite high in the top couple of octaves. It's the same problem that all "line" sources like ribbons have. Great up until 5-6k Hz, but who wants to have a crossover point there???
DI or no poor DI, a room untreated will be a mess.
I opt for good DI AND room treatment!
I think that tweeters sound more transparent but less dynamic therefore less realistic vs CD. especially if the tweeters are XO too low. pick your poison.
CD are larger then tweeters and ive never heard a tweeter able to reproduce a hi hat as well as CD
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There certainly are; the Radian 850PB is probably the best I have come across so far, but none can match the low distortion at high output compared with the Beyma AMTs.
At the moment, I have been enjoying compression drivers with various horns.
Waveguide Comparison using Dayton Audio DT250P | Speaker Projects by Zilla
The frequency response is certainly not flat but the overall sound was good although not the best I had heard. Out of curiosity I purchased an Eminence, Pyle and B&C compression tweeter and found they all sound different (just like normal dome tweeters from Vifa, Scan Speak, Morel, etc...). To add to the fun (or confusion, depending how you look at it) changing out the horns also changes the sound. To my ears, the cheapest Pyle ($25) and most expensive B&C ($105) sounded best - but in different horns.
Crossover also plays a role. The reason I chose a compression driver + horn was to crossover to a 10" driver at 1.6k.
Because I like the sound of compression drivers plus horns I would certainly consider using one for a higher crossover - and built a smaller 8" system plus compression driver with a higher crossover for my son away in college.
Overall, I would not say the sound of compression driver + horn is better than a traditional dome but it is different enough that I'd recommend listening to one before passing judgement.
The bad ones can sound lispy, dry and dull at the tippy top. The good ones sound smooth, liquid and detailed. Good or bad, they always play loudly and with dynamic crashes and crescendos that may, in fact, rival typical domes.
The ribbons I've heard always sound artificial to me. Plus, I'm 51 so my hearing is gone above 16k.
Waveguide Comparison using Dayton Audio DT250P | Speaker Projects by Zilla
The frequency response is certainly not flat but the overall sound was good although not the best I had heard. Out of curiosity I purchased an Eminence, Pyle and B&C compression tweeter and found they all sound different (just like normal dome tweeters from Vifa, Scan Speak, Morel, etc...). To add to the fun (or confusion, depending how you look at it) changing out the horns also changes the sound. To my ears, the cheapest Pyle ($25) and most expensive B&C ($105) sounded best - but in different horns.
Crossover also plays a role. The reason I chose a compression driver + horn was to crossover to a 10" driver at 1.6k.
Because I like the sound of compression drivers plus horns I would certainly consider using one for a higher crossover - and built a smaller 8" system plus compression driver with a higher crossover for my son away in college.
Overall, I would not say the sound of compression driver + horn is better than a traditional dome but it is different enough that I'd recommend listening to one before passing judgement.
The bad ones can sound lispy, dry and dull at the tippy top. The good ones sound smooth, liquid and detailed. Good or bad, they always play loudly and with dynamic crashes and crescendos that may, in fact, rival typical domes.
The ribbons I've heard always sound artificial to me. Plus, I'm 51 so my hearing is gone above 16k.
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