SDA effect in other products?
After reading some more about the SDA effect, a memory popped into my head. Back in the early 80s, my friends and I were getting into stereos and the all important "boom box". There were a number of makes (Panasonic and Techniques to name a few) that had a switch on them labled "Ambiance" or "Spatial". When activated, the soundstage would go from just in front of the radio to something two to three times it's size in width! Beyond this, it is hard to describe the sound. I still have one of the Panny models with this effect. Could this be the same thing? I believe it sends the signal from one channel back to the other with a very slight delay.
What are your thoughts?
What are your thoughts?
Things are more like they are now than they ever will be!
Post edited by polkfan38 on
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H9
Pass Aleph 30 | EE Avant Pre | EE Mini Max Plus DAC | MIT Shotgun S3 | MIT Z P/C's | updated SDA 1C| SQ Box Touch/Welbourne Labs P/S- Tubes add soul!
http://en.wikipedia.org/wiki/Sonic_holography
wayne
.... " SDA is patented and exclusive to Polk Audio "
Any clue how to use the internet? Found it in about 10 sec. 12-18-84
Click here
H9
Pass Aleph 30 | EE Avant Pre | EE Mini Max Plus DAC | MIT Shotgun S3 | MIT Z P/C's | updated SDA 1C| SQ Box Touch/Welbourne Labs P/S- Tubes add soul!
LOL
That's sig material right there!
Alpine 9856
Phoenix Gold RSD65CS
For Sale
Polk SR6500
Polk SR5250
Polk SR104
H9
Pass Aleph 30 | EE Avant Pre | EE Mini Max Plus DAC | MIT Shotgun S3 | MIT Z P/C's | updated SDA 1C| SQ Box Touch/Welbourne Labs P/S- Tubes add soul!
Maybe a little
H9
Pass Aleph 30 | EE Avant Pre | EE Mini Max Plus DAC | MIT Shotgun S3 | MIT Z P/C's | updated SDA 1C| SQ Box Touch/Welbourne Labs P/S- Tubes add soul!
What Brock said, it's worthy of being in a signature (look, I implemented it in mine!)
Alpine 9856
Phoenix Gold RSD65CS
For Sale
Polk SR6500
Polk SR5250
Polk SR104
H9
Pass Aleph 30 | EE Avant Pre | EE Mini Max Plus DAC | MIT Shotgun S3 | MIT Z P/C's | updated SDA 1C| SQ Box Touch/Welbourne Labs P/S- Tubes add soul!
Epson 8350 Projector/ Elite Screens 120" / Pioneer Elite SC-35 / Sunfire Signature / Focal Chorus 716s / Focal Chorus CC / Polk MC80 / Polk PSW150 sub
Bedroom - Sharp Aquos 70" 650 / Pioneer SC-1222k / Polk RT-55 / Polk CS-250
Den - Rotel RSP-1068 / Threshold CAS-2 / Boston VR-M60 / BDP-05FD
ha. they have em. theyre called stereo headphones :P
there is no crosstalk to be cancelled.
We installed a few killer systems back then, but sadly it never really took off. My memory is foggy but I believe there was a "processor" box all the speakers ran through and it was quite expensive for the day, IIRC. It was pretty cool.
H9
Pass Aleph 30 | EE Avant Pre | EE Mini Max Plus DAC | MIT Shotgun S3 | MIT Z P/C's | updated SDA 1C| SQ Box Touch/Welbourne Labs P/S- Tubes add soul!
Yep.
There was a venture with Hyundai back in the 80's, when those cars were first being sold here. Problem was they were being stolen because word got out that the car stereos sounded so good. Also, there was the Polk Audio ACM (active cancellation matrix) sold as a car audio seperate. I believe it was basically just a passive network. Results when using it were varied. :cool:
I would love to hear this setup
Correct and it didn't work in every vehicle due to the fact the existing sound system was usually awful to begin with. For the most part Polk laid 12v on the side, for many years unfortunately. The later DSP idea from other manufacturers was better but still couldn't fix the underlying problem. I hate to say it but the BOSE systems were one of the first to get commercially and large scale manufacturer oriented. At that point so much was changing in home audio vs car audio that Polk simply missed the curve.
http://www.vanlspeakerworks.com/quartet.html
"Ambient recovery system... We use dual voice coil drivers and an additional connection between the speakers to pass the differential information between the two speakers."
Taken from their website...
Saying that it's "too hard" to pursue your dreams is no different than admitting to yourself that you are too lazy to achieve them.
“If it moves, tax it. If it keeps moving, regulate it. And if it stops moving, subsidize it.”
I once saw the SDA xover matrix up on ebay, but i had no idea what it was.
I will say that the Van is question had the best sounding system of the day. The detail it delivered was beyond anyone's expectations.
Only twice and it was neat but I've heard much better custom setups that were simply EQ'd better. I don't believe it was quite as plug and play as it was designed to be and by then it was not something that sold well anyways. With the emphasis on front staging being more common, since that does sound better theres no need. DSP eclipses the SDA effect in a vehicle and it even outdoes SDA in a 2CH setup. Polk is already doing a lot of DSP work in the subwooofers and will extend that into more active components down the road.