View Full Version : SDA Interconnect issue's
As some of you may already know, there is this nagging issue with my pair of SDA's when the interconnect is plugged in. Although no physical difference in sound occurs, when this cable is plugged in the amp is quickly over-heated. I have blown one fuse as it is, and clipped a very powerfull HK 3470 stereo reciever at ridiculously low volumes...
It almost seems as if once the interconnect is placed into the slots, the ohm load drops to 1 or 2.....
I am open to suggestions, as I have no real clue on where to begin, or how.
04-13-2003, 12:14 AM
Do you get the SDA effect when you use the cable?
I am not quite sure what the "SDA" effect is. People seem to refer to this as imaging. In that case , then no. The imaging is just fine without the cord.
What does happen though, is a dramatic increase in clarity.... The harsh highs subside to tolerable levels, and the sound is over-all more defined.
04-13-2003, 12:20 AM
It's really more like soundstage, a wide soundstage. Sounds from way outside the edges of the speakers.
04-13-2003, 07:01 PM
If you're not happy with cable, send it back to me and I will
replace it with same as type Polk original cable they used.
You don't have to pay for anything free shipping when I send
it back to you.
04-15-2003, 10:18 AM
It may not be an SDA interconnect issue. With the speakers being previously owned, I'd make sure to check the crossovers/wiring. I wouldn't be suprised to find out that one speaker has the SDA effect speakers wired as the mains and vice versa.
04-20-2003, 08:30 PM
I found the same thing today when I hooked up an old NAD 2200 amp. One side of the amp could be used for toasting bread and would go into protection mode at moderate volume. Without the SDA crossover wire the amp works fine.
I switched back to the Marantz 8200 and all worked great even with the SDA crossover wire installed.
It may be that the NAD and the amp you used are not the common ground type. The Nad works fine with a pair of Tannoy S10s.
Will have to tear open the speaker and see what I can find. Just havent had the time or the desire to do that recently...
Very---very interesting. My only beef is that the SDA's first began this issue with a Harman Kardon 3470 stereo reciever. It could very well be a grounding issue, however. Not sure how I would go about finding a remedy to this situation however.
Thanks boys, Im now armed with a few ideas and a direction! :)
04-21-2003, 11:40 PM
If you have a non-common ground reciever(amp) or some sort of grounding problem, the AI-1 interface will fix the problem. You can't buy it anymore, but I've got the plans for one that someone posted here.
This type of stuff is right up my dads alley. Afraid I will have to use his hands on expertese to guide me through your advice. Thanks again gents.
No problems at all with the cables bud. Thanks for your offer though, your a true class-act!!!!!! The cables have been tested, they are fine! Nothing wrong with em at all!
Well me and my dad ripped apart the amp. Its not grounded, only a 2 prong connection. They do have a grounding outlet but no friggen wire connecting anything!? Tell me what the point that is? *pulls hair from head*
He ended up slitting an extra power cable, and running some speaker wire from a wire, to the ground unit.
Unfortunately, it did no good. The SDA's heated the amp up pretty good......
Back to the drawing board. Good suggestion though!
04-28-2003, 04:29 AM
Grounded AC supply cord and common ground amp design are two different things altogether.
You need to build the special SDA interconnect F1 mentioned.
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