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Post subject: Re: While we are on the subject of speaker cabs - Wattage
Posted: Sat Sep 08, 2012 8:03 pm
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aclempoppi wrote:
There is a misunderstanding Bill, the point is not that the NFB and spkr hook-up are related. It's the sound of control and less control. It's just that the two are a similar change to the percieved sound. Again, it is a subtle difference. Art


Ok.

I am not a believer in "golden ears" or musicians with "dog ears". If it cannot be demonstrated through either measurements or a double blind A/B/X test, it doesn't exist. Sorry. No disrespect for you or your hearing acuity (I'll admit my ears are shot), but I have read and studied enough about claims like this to be highly skeptical of them.

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Post subject: Re: While we are on the subject of speaker cabs - Wattage
Posted: Sat Sep 08, 2012 8:24 pm
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Bill, always the engineer! Some people do believer in these 6th senses, I'm like you, more fact driven. Good stuff in this thread!

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Post subject: Re: While we are on the subject of speaker cabs - Wattage
Posted: Sat Sep 08, 2012 10:51 pm
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Arnold Layne wrote:
Bill, always the engineer!


Its a curse I must live with. :lol: :lol: :lol:

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Post subject: Re: While we are on the subject of speaker cabs - Wattage
Posted: Sat Sep 08, 2012 11:23 pm
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It's all good, you guys!!! I took the spkr class many years ago. So I respect the theoretics(got a stack of data in the drawer). It's just that I've been around the block and over the bridge, and now it's all about playing with good musicians. My hearing is very sensitive, don't know why. BTTW My Dad was a mechanical and aeronautical design engineer, grew up at his elbow. No problem with my respect, Bill. Art

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Post subject: Re: While we are on the subject of speaker cabs - Wattage
Posted: Sun Sep 09, 2012 9:00 am
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aclempoppi wrote:
It's all good, you guys!!! I took the spkr class many years ago. So I respect the theoretics(got a stack of data in the drawer). It's just that I've been around the block and over the bridge, and now it's all about playing with good musicians. My hearing is very sensitive, don't know why. BTTW My Dad was a mechanical and aeronautical design engineer, grew up at his elbow. No problem with my respect, Bill. Art


:D

I've studied speaker design for quite a number of years and am very familiar with the parameters and test methods. I could go all day (but I won't :lol: ) on double blind listening tests. I have participated in several. I remember all the double blind tests that were conducted between Dolby Digital and DTS and still are conducted on each new surround algorithm. None were ever conclusive to my recollection.

The thing many people don't consider is that sound reproduction (or generation in the case of a guitar amp and speaker) is in fact a total system that includes the equipment and room. Minor nuances that can be measured in isolation are often swamped by the whole.

If you can hear something that I can't (and you probably can), great. If you can back it up with data, even better. :wink:

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Post subject: Re: While we are on the subject of speaker cabs - Wattage
Posted: Sun Sep 09, 2012 9:13 am
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bluesky636 wrote:
aclempoppi wrote:
It's all good, you guys!!! I took the spkr class many years ago. So I respect the theoretics(got a stack of data in the drawer). It's just that I've been around the block and over the bridge, and now it's all about playing with good musicians. My hearing is very sensitive, don't know why. BTTW My Dad was a mechanical and aeronautical design engineer, grew up at his elbow. No problem with my respect, Bill. Art


:D

I've studied speaker design for quite a number of years and am very familiar with the parameters and test methods. I could go all day (but I won't :lol: ) on double blind listening tests. I have participated in several. I remember all the double blind tests that were conducted between Dolby Digital and DTS and still are conducted on each new surround algorithm. None were ever conclusive to my recollection.


Speaking of, is USL (Ultra Stereo Labs) still around? Wasn't ultra-Stereo a direct competitor of Dolby in the 80's and 90's? Seems they had some ex-Dolby employees.

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Post subject: Re: While we are on the subject of speaker cabs - Wattage
Posted: Sun Sep 09, 2012 10:12 am
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Art1 wrote:
Speaking of, is USL (Ultra Stereo Labs) still around? Wasn't ultra-Stereo a direct competitor of Dolby in the 80's and 90's? Seems they had some ex-Dolby employees.

Art


I don't recall them (there's that age thing again :lol: ), but here is there website:

http://uslinc.com/main.html

They appear to build processors, sound, and projection equipment. It does not look like they did any algorithm development.

The main competitors for surround sound in theathers has pretty much been Dolby (Dolby Surround and Dolby Digital), DTS (DTS), and Sony (SDDS). In the home its been Dolby and DTS with a few one-offs like Ambisonics, Lexicon, Harmon-Kardon, and a few others.

Here's an interesting paper on sound localization using Ambisonics (which I recall had some rather odd speaker positioning and seating requirements) that I stumbled across.

http://www2.derby.ac.uk/sparg-content/P ... Paper1.pdf

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Post subject: Re: While we are on the subject of speaker cabs - Wattage
Posted: Sun Sep 09, 2012 1:46 pm
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I think they did do some algorithm work but that was late 80's. But anyhow, good to know they are still around.

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Post subject: Re: While we are on the subject of speaker cabs - Wattage
Posted: Sun Sep 09, 2012 2:20 pm
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Art1 wrote:
I think they did do some algorithm work but that was late 80's. But anyhow, good to know they are still around.

Art


Probably on the decoding side as opposed to the encoding side.

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Post subject: Re: While we are on the subject of speaker cabs - Wattage
Posted: Sun Sep 09, 2012 11:57 pm
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See what I can dig up. The hard copies are just handouts from a basic Electronic-Acoustic's class, offered at our commuinity college, not a post grad class. Art

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