Thirty plus years ago, on a fluke I put my RS Nova 8Bs inside a closet & listened....I noticed some oddities...standing at a particular place in the room & "heard" some extension never before heard. I found a Grammaphone Organ LP & sure enough some of that super deep stuff blubbered out........
In Portland (OR) there was one of these giant pipe organs set up at a Pizza joint in SE.....yes "that" was the sound/sensation I had heard, sub aural.
Given that I have "discovered" sub sounds by accident ....a sim has a better chance of "finding" these "sensations".
Now if I can justify consuming so very much floor space..the WAF ya' know....too bad I don't have that LP anymore, let alone a TT to make it go!
Surely the 15" driver would run out of Xmax easily & quickly, sure would be a cool experiment to try. If it didn't work out I could always have enough wood for multiple other projects.
_________________________________________________Rick.......
In Portland (OR) there was one of these giant pipe organs set up at a Pizza joint in SE.....yes "that" was the sound/sensation I had heard, sub aural.
Given that I have "discovered" sub sounds by accident ....a sim has a better chance of "finding" these "sensations".
Now if I can justify consuming so very much floor space..the WAF ya' know....too bad I don't have that LP anymore, let alone a TT to make it go!
Surely the 15" driver would run out of Xmax easily & quickly, sure would be a cool experiment to try. If it didn't work out I could always have enough wood for multiple other projects.
_________________________________________________Rick.......
There's a funny noise starting to appear in the forum at the moment, like a bird call - highly regular, like a background noise, it can be tuned out quite easily ... 😉
The point is, the 'static' phenomenon occurs, it's totally consistent - it has a signature effect on the type of distortion it injects into the sound. Most audio has this regularly as part of the sound, it's been around so long that it's just accepted as being part of the package ... . Like many things in life, it's only the absence of it that makes you aware of the impact of its presence, perhaps for the first time. We're not talking 'in your face', OTT audibility - a good word to use is 'dreariness' -- so much audio has a dreary, take it or leave it aspect to the sound - you have to put strong focus into listening, to 'enjoy' it. That's the area where the static behaviours are very important - a single, slight adjustment can make all the difference ...
Edit: http://www.hottconsultants.com/pdf_files/dipoles-1.pdf ... I digested his thoughts on the matter, as here, years ago - and agree entirely. I was already tweaking in ways relevant to that, and was pleased to read 'expert' confirmation ... 🙂
Last edited:
OK, the noise seems to have abated............
Never have I seen Antenna theory dumbed down this much..........perhaps if the Author had actually thrown out some formulas, measurements, data, it would have been apparent just how little "interference/noise" effect applies to audio circuits.
______________________________________________________Rick.......
Never have I seen Antenna theory dumbed down this much..........perhaps if the Author had actually thrown out some formulas, measurements, data, it would have been apparent just how little "interference/noise" effect applies to audio circuits.
______________________________________________________Rick.......
How can you possibly know 🙂
They can be "biased" with a DC voltage on the amp outputs.. So if I want the cone to be aligned 5mm in or out from the center I do that.
As the xmax (peak to peak) are 30mm and the linear xmax are 18mm or more depending on the voice coil a 5mm off center position reduces the xmax.
The magnet system, voice coils, cone, surround -> every single part of the drivers are designed and specified by me, and thus I have not incorporated the normal limitations and I have not saved any costs by using low grade materials etc..
My last ported enclosures was built in 1974 (vented) and 1977 (TL).
After that it have been OB and slot loading.
IOW, exactly what DF96 said. They move in response to DC (like any electrodynamic speaker), but they don't "work" there unless you're claiming that they create a steady room overpressure.
😀
The difference are that my drivers actually do work down to 0Hz and ordinary drivers will and can not. If you apply 0.001Hz the cone will move in and out to the full xmax with my drivers. Ordinary drivers will when you put DC voltage on them start the movement, but then be pulled back to near the center.. Applying 0.001Hz or 1Hz for that matter on ordinary drivers will as you state most possibly not create much movement if any at all.
Well, that's odd, since I have in front of me an ordinary driver and a 1.5V battery, which presumably puts out DC. When I attach the battery to the driver, the cone moves and stays in position. When I reverse the battery, the cone moves the other way and stays in position.
Perhaps you might want to rethink what you're claiming as a differentiation. I'm certainly not the only person reading your claims who understands how loudspeakers work.
Perhaps you might want to rethink what you're claiming as a differentiation. I'm certainly not the only person reading your claims who understands how loudspeakers work.
Of course it moves, but it does NOT stay at the distance the 1.5V should have caused.
And If you look closely or maybe need a high speed video camera you will see the cone start the movement, reach a maximum movement point, and then be pulled back and settle (most possibly with some "ringing" before it settles) in a position where the imposed physical limitations force it to stay.
Angry is a useless emotion in cases like this. There will always be people that operate their keyboard before engaging their brain 😉
Maybe a better emotion is to reflect on the marvellous variation in people, in many different ways. 😎
Jan
Maybe a better emotion is to reflect on the marvellous variation in people, in many different ways. 😎
Jan
Its dumbed down so most people with some basics in electronics can understand it, there is plenty of further info out there for those who want to go deeper into it.
The Author is Henry Ott, who has spoken at the AES, maybe you should look at his site before you start before you start making statements that are wrong, Audio is as probe to noise as much if not more than other circuitry.
Yes you have seen and listened to how they perform, and you had to adjust the DC offset of you amps as the DC offset was clearly visible (and most possibly audible) with my drivers, but not with your drivers 🙂
I am aware that electronics are susceptible to static failure, that is why when designing a system or product we go to great lengths to avoid it, now it may be a pain in audio, but on some stuff I work on It will cause more upset than some distortion.
There are ways of minimising the risk.
You don't know, why I angry at Ray.
But seems to me, he also doesn't know.
He promised it, writes a letter to me if he arrives.
He would know it, how I'm a worrying.
Excuse me for off topic.
If some DC offset is audible there are problems with the magnetic motor linearity/ suspension linearity of your drivers, so that does not speak in favour of them.
OTH I can't align your assertions with the way drives operate as electromechanical devices subject to the laws of nature.
Either I have not explained properly or you are either not reading correctly 🙂
There is no problems with linearity - actually the opposite..
Thus with 0 Volt DC the linearity are 100%, and for every microvolt applied the voice coil and thus the cone will move according to the polarity. Why should I make drivers that are non-linear just to allow faulty amplifiers to be used.
Ordinary drivers have suspension non-linearities and most often magnetic motor non-linearities. And worst off all the non-linearities are most often frequency and level dependent -> thus different levels off non-linearity depending on frequency and level....
- Status
- Not open for further replies.