That's the thing, it seems pure titanium is not half as useful as one of many titanium alloys, aerospace industry normally uses titanium-aluminium alloys for airplane skin plating. I have Audax "titanium" dome tweeters with a waterfall diagram to make you weep how nice it looks, practically ideal up to +1 dB of power, after which it collapses very quickly. In practice, it sounds very precise and well defined, with no traces of any sheen and/or misbehiving in general.
Yeah it did. Looking at mine it appears to have been ripped off in an accident. Researching options for a retip I had not realised how much carp is spouted on various high end stylus shapes given only about 3 companies make them!
Pure Ti is a complete pain for most applications if I remember my materials lectures. You use it where nothing else works (really hot stuff) and live with the problems (think SR-71 and the fact it leaked fuel on the ground until it got hot). I have some memory about it being a pig to machine as well <google> Machining Titanium on JobShop.com
Dunno how they did it, but Shure used to sell Be cantilevers 18 mil diameter and 0.5 mil wall, for a 36:1 ratio. Fairly close to bicycle frame optimum of old of 50:1.
But everything about phono cartridges seems impossible in my shakey old age.
All good fortune,
Chris
Yet it produced a small revolution in dome loudspeaker manufacturing, and if memory serves, JBL started it all in 1984. Not pure metal vapor deposition, but if done properly it can produce some excellent results. My own speakers use the Audax version (remember, Audax of France was wholly owned by Harman International, just like JBL), and my wife's JBL Ti600 floorstanders use a version made by Audax for JBL. Many JBL spekares 15 years ago were made using Audax drivers and in Europe, initially in Denmark.
Clean and clear both of them, no sheen, no spitting, very detailed, I'm pleased to say that both are very pleasing to listen to for hours on end.
Hi guys, Jan Didden in particular, what do you guys think of the ecx10p20 etc lateral mosfets? I have not used them, but they do look interesting.
They are not a revolutionary improvement in performance, but they are meant to be application-compatible with the Renesas and are a bit better in most specs.
I have no experience with them but from the data sheet they seem a nice device for audio. The zero tempco Id is around 110mA so would be right on the dot. Inter-terminal capacitances also seem nicely low.
Not sure about the SOA, the graph seems very limited in information. What does 'DC operation, single pulse' mean?
Are you thinking about designing an amp with them? Should be interesting.
BTW Profusion is an excellent source for audio active devices that seem to become more and more scarce. I've bought from them in the past, no issues with possible fakes, but that comes with a price of course. Probably even more so after Brexit 😉.
Jan
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OK, guys For a refreshing change of pace, this is what I am now interested in when it comes to room improvements. This is what Jack Bybee and I talked about last week at lunch.
I know that most of you will not believe it is real or possible. But then again, some people still believe that the Earth is flat, not round. Keep that in mind when you respond. '-)
This is from 'Stereotimes' I am pretty sure.
I know that most of you will not believe it is real or possible. But then again, some people still believe that the Earth is flat, not round. Keep that in mind when you respond. '-)
This is from 'Stereotimes' I am pretty sure.
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So how does it change the frequency response or resonant/damping qualities of the room?
*I'm a fan of a round world, but it requires math and some critical thinking to know it's not in fact flat, as our normal view would insinuate. So in the same vein, where's our Eratosthenes?
*I'm a fan of a round world, but it requires math and some critical thinking to know it's not in fact flat, as our normal view would insinuate. So in the same vein, where's our Eratosthenes?
Hey, I am just the messenger! '-)
The nitrogen in the air in the room is changed in some way.
The nitrogen in the air in the room is changed in some way.
I stopped reading at 'C13 isotopes'. When it's that wrong up front you know it'll only get worse.
But hey, the just for men advert says if I put their gunk in my hair not only will the grey go, but I'll become good at rock climbing as well 🙂
But hey, the just for men advert says if I put their gunk in my hair not only will the grey go, but I'll become good at rock climbing as well 🙂
John, you are smarter than this nonsense, this reads like "I'm an audio reviewer not a physicist" crap from the 80's. This thread has been waning probably with good cause.
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