*WHITE PAPER* The Sound of Music - How & Why the Speaker Cable Matters


G'DAY

I’ve spent a sizeable amount of the last year putting together this white paper: The Sound of Music and Error in Your Speaker Cables

Yes, I’ve done it for all the naysayers but mainly for all the cable advocates that know how you connect your separates determines the level of accuracy you can part from your system.

I’ve often theorized what is happening but now, here is some proof of what we are indeed hearing in speaker cables caused by the mismatch between the characteristic impedance of the speaker cable and the loudspeaker impedance.

I’ve included the circuit so you can build and test this out for yourselves.


Let the fun begin


Max Townshend 

Townshend Audio



F78318cb 1fc9 49a2 8d02 edd399ef66f5Ag insider logo xs@2xtownshend-audio
The only way to get a square wave out is to match the cable impedance to the load impedance. This is a standard way of determining the characteristic impedance of unknown coax cable. The trick was shown to me when I was working on the ill-fated Blue Streak Rocket development at the Weapons Research Establishment in Adelaide in the early 60s.
See my videos Geometry Matters on youtube.

Max
Audio2design is suggesting that transmission line theory does not apply at low frequencies. Well, it does, even at DC. see

https://www.youtube.com/watch?v=ozeYaikI11g&t=136s

And at 50/60Hz bigtime. 

Max
How many square waves do we experience in audio at 10KHz. The correct answer would be 0. That has a fundamental sine-wave component at 10Khz, and every single harmonic is inaudible. It is a meaningless test.

Cool, what does Rocket Development have to do with understanding electrical theory and transmission lines?

townshend-audio OP303 posts11-22-2020 9:53amThe only way to get a square wave out is to match the cable impedance to the load impedance. This is a standard way of determining the characteristic impedance of unknown coax cable. The trick was shown to me when I was working on the ill-fated Blue Streak Rocket development at the Weapons Research Establishment in Adelaide in the early 60s.
See my videos Geometry Matters on youtube.

Max


townshend-audio OP303 posts11-22-2020 9:59amAudio2design is suggesting that transmission line theory does not apply at low frequencies. Well, it does, even at DC. see....


Now you are lying to discredit me. In fact, I have specifically pointed out to others in this thread that transmission line effects absolutely come into play even at 1KM with audio frequencies. It is readily available for anyone to see in my posts. I have copied them below.

The video you posted is not showing transmission line effects for DC, it is showing transmission line effects for the transient when a voltage is connected which is of indeterminate (due to parasitics) but very high frequency. It is not "DC" at the point of turn on, it is a transient.


Please don’t get angry at me for your lack of understanding of a topic.


audio2design245 posts11-18-2020 10:20pm

Technically there are always reflections, however, the impact on power transfer at audio frequencies is several hundred db down.

audio2design245 posts11-21-2020 10:55am

A 100khz signal at 100 meters may only settle within 60db, a 40khz signal will be 150db down.

audio2design245 posts11-21-2020 4:21pm

.... kijanki, ... I would be careful with the 1000 meter example. In that case, the worse case would be -60db error at 20KHz, which could be argued as audible. That is worst case though. Odds are it will be much better.

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