Self Medicating > General DIY
An Unusual Speaker Cable, Very Very Low Inductance, Size Matters
P.I.:
Years ago, John Bau (Spica Speakers) master of much, determined that ribbon cable (40 conductor) x 2 was the deal for loudspeaker cables.
Now, we know that there are many cable lays that work. We also have learned that PVC insulation blows. What else makes a BAD cable? Inquiring minds..........
rollo:
Thorough answers as always. Always learn from you. Thanks. There is NO "best" just what is best for ones set up.
charles
steve:
--- Quote from: tmazz on July 18, 2019, 05:02:36 PM ---
--- Quote from: steve on July 17, 2019, 11:53:47 AM ---
--- Quote from: rollo on July 17, 2019, 10:11:46 AM --- What I am getting out of this is cabling that is well engineered for one system may not be the same in another system. Another thing is that engineering of such is not a simple matter.
So my question is how much does speaker Z and Amp Z differences affect cable design ? Does one size from Manf's fit all ? This may be the so called synergy one hears with a cable design???
charles
--- End quote ---
First, Nick, I should have not posted #4, I don't know why I did. Would you delete it?
Good question Charles. From my testing, you are correct. Differing amplifier output Z and speaker Z
will affect what gauge speaker wire is optimum. I just recently did a multiple tweak on the speaker,
and optimum speaker wires in parallel is now 12 instead of 10. I am doing a see saw of speaker
control adjustment, crossover, and speaker placement, and adjusting the number of parallel wires.
Correct again Charles; engineering is not a simple matter even for wires. As one's system gets better,
any adjustment, substitution etc becomes more critical. One size cable does not fit all for the following
reasons.
1) The tweeter's quality varies so much, at least some are bright, that a lesser number of parallel
wires will bring down the brightness due to increased inductance. This inductance will have less affect
as the frequency lowers. I know, kind of a tone control.
2) With point 1 stated, all drivers will still be affected to some degree by the cable resistance and inductance.
Of course, the bass damping will be affected by the total gauge of wire.
3) As you already know, there are many combinations of drivers used in speakers. As such, different speaker wires will be optimum for each combination.
The end result is a closer to natural reproduction we seem to enjoy. Of course personal preference rules.
I hope I have covered the bases you were concerned effectively.
Cheers
steve
--- End quote ---
Hence the reason there is so much difference in opinion on what is "the best" cable. Perhaps it is just that while there are many good cables out there certain cables just match up better with certain eqipment, thus resulting in all of the differing opinions.
I certainly have first hand experience with getting a cable that sounded great in my system only to excitingly bringing it to a friends where it not only did not sound as good as it did at my house, but actually sounded bad. (and the sounded great again when I brought it back home.)
--- End quote ---
From my experiments, experience, you are right on the money T. I hope your friend understands
and appreciates your knowledge.
cheers
steve
rollo:
OK then what would one need spec wise to design a speaker cable for a said system. Meaning Amp and speaker. I am very pleased with two Manufactured cables we use however would like to hear a dedicated design for my amp/speaker combo.
Can that be accomplished ?
charles
steve:
--- Quote from: rollo on August 06, 2019, 07:00:03 AM --- OK then what would one need spec wise to design a speaker cable for a said system. Meaning Amp and speaker. I am very pleased with two Manufactured cables we use however would like to hear a dedicated design for my amp/speaker combo.
Can that be accomplished ?
charles
--- End quote ---
From my experience, Charles, trial and error is the only way. Just too many variables to deal with.
Amp output impedance (Z), cable resistance/inductance, and speaker impedance characteristics
(includes each driver's Z characteristics and crossovers) all affect final sonic results.
For instance, what cable might be best for the woofer might not be best for the midrange/tweeter
driver. Just the opposite is also true. Crossover values and speaker positioning included.
Working with my test speaker, I found, for me, that the best cable characteristics for the midrange/highs
was not best for the woofer. So I then adjusted the damping for the woofer using switch
positions (resistors). I went back and forth until I optimized for all the drivers. I also adjusted the
crossover parts values.
Cheers
steve
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