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Equal length wiring
Equal length wiring
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Old Yesterday, 11:30 PM   #31
tommus is offline tommus  United States
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I just read an article about a situation where the wire length was important. It was the Trinity atomic bomb prototype. These wires were there to trigger the multiple explosive lenses that would create a perfectly spherical implosion.

Click the image to open in full size.

Cable management is sub-par.
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Old Today, 05:16 AM   #33
PRR is offline PRR  United States
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Equal length wiring
If L/R length matters, we have to sit ON the center between our speakers to sub-micron accuracy, because speed of sound in air is so much slower than speed of audio in wires.
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Old Today, 08:06 AM   #34
Jazz Man is offline Jazz Man
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Exactly, and time delay is not the issue hpro imagines it to be. Phase shift is possibly an issue.
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Old Today, 08:51 AM   #35
hpro is online now hpro  Switzerland
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That's only my opinion. everyone free to have it's own opinion in this matter..

When we sat in the nineties in Hifi House in Bangkok, there were guys who could hear out what kind of CAPS were used in AMPLIFIER. What Kind of Cables between the devices. I was there and have seen it..

I do agree that for 1 or 2 inches it (may) don't matter.. and I can not tell you if this matters, in the circuit, but for me I try to design my Artwork, so I do not need to find errors when it don't sound the same because of different sizes and lenght of connection tracks, or cable connections. I have had that recently on speaker cables, Measuring distortion while testing an amplifier Ciruit. and just because that pair of speaker had not exactly 8 Ohms.. then Exchanging Cable to a shorter one removed the problem.

In the early Nineties, I was in love with a beatifull Thai Lady and her father had an Electronics shop in Chiang Mai, Thailand. I went to help him to build his Amplifiers he build and sold there..

Mosfet 2SK176 with 2SJ56 *If I remember rigth* it was a copy of Hafler DH-220..
And we had always problems when connecting Speaker cables with more lenght than 5 Meters. I know that cause has nothing todo with this here or only little. But again shorter Cable did not Oscillate. Ripping the cables apart did not solve the problem, but shortening the cables down to 1.5 meter and all Oscillation was gone.
So please forgive me, I stand up that length matters.

thanks you for understanding.
Let me ask one more question:where is the problem to desing something evenly, that whatsoever no chances are taken that because of not distribuiting Current Voltage, energy evenly, will bring up problems. Even if don't matter as you guys write, OK with me, but I do not like to TAKE CHANCES and then to find out, why afterwards instead of listening and enjoy music which is played, sound is like a trash can.!..

Any one can look a this as he likes.. I do not try to convince anyone to change his mind, but I have seen to many examples where cables and wire were the culprit.!

Last edited by hpro; Today at 08:54 AM.
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Old Today, 11:18 AM   #36
Tubelab_com is online now Tubelab_com  United States
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Originally Posted by hpro View Post
Sound is moving in one second only 300Meter as far I remember, "speed of sound in dry air at 20 C = 343 m / s"

Speed of electricity In copper at 60 Hz, 3.2 m/s. this is what wikipedia tells me..it goes faster with rising frequency At least that's what I have seen also many time..
So, according to this sound of multiple frequencies travels at roughly a constant speed in air which is roughly 100 times faster than the same electrified sound travelling through the wires to the speakers, and that electrified sound will have a different speed of travel dependent on it's frequency with the treble arriving before the bass.

How then did I ever get outdoor speaker setups for live musicians to work where the speaker cables were over 10 meters long? Ever try to play a guitar when your monitors are delayed by even a few mS due to digital latency in a DAW or other signal processing equipment?

Live music would be impossible if the monitors were delayed by hundreds of mS, so every musician would have to use exactly the same cable at exactly the same length. Some instrument cables are rather long, and some instruments use no cable at all (wireless transmitter). The cables from the amps to the speakers are not all the same. How is it that all the sound is in sync?

Try this simple test. I have a test setup in my lab currently for working on reasonably powerful amplifiers. There is 50 feet (15.24m) of speaker wire connected between each output and the portable test speakers. This is so I can place the speakers in a closet to test at high volume levels without blowing my ears or upsetting the neighbors. I can plug headphones with a 1m cable into the same amp and run them concurrently.

Even with over 15m of cable the sound from both sources appears to be in sync.

There are plenty of ways to verify that WickedPedia is wrong in this case. I have shown a few, and I refuse to take this bait any longer. It just tastes bad.

Try some of these experiments for yourself or just think it through. Most of the tech we use today would not be possible if "electricity" in a wire only moved at m/S speed.
Tubelab, I blow stuff up so that you don't have to.
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