odigg
500+ Head-Fier
- Joined
- Apr 1, 2008
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Some people in this forum have been trying to come up with a protocol for blind testing cables in a relaxed setting. Rather than get cranky about it, I've been thinking about it. Unfortunately I've hit a bit of a logical dead end. Please follow my logic to see if you can reconcile this problem for me.
First, a cable is designed to be a passive device. It is, by design, not supposed to change the sound. Yet, people are hypothesizing that is not simply a passive device, but it is somehow changing the signal it is carrying.
So, in short, this is stating a passive device is actually an active device. But if a cable can be an active device, why not other passive devices like headphone jacks, headphone plugs, connectors, wire in amps, dacs, sources, the cases of equipment, solder, etc?
You might think this is ridiculous, but people have claimed these things make a difference. Certainly people buy expensive headphone jacks, headphone plugs, special RCA jacks, special solder, in the hope of not degrading their electrical signal flowing through their headphones.
So here is where I'm stuck. If you claim a negative result from a cable blind test, how can you attribute it to cables since there are so many other passive devices that can be changing the sound? How can you say it's not the RCA plugs on the amp that are contaminating your results? How can you ever claim a negative result is valid if you cannot demonstrate all passive devices in the test are indeed passive?
So what about a positive result? Again, you've got the possibility of contamination from other passive devices. How do you know it wasn't just the cables, but some interaction between the cables and some other passive device? Or maybe it was the passive device itself and not the cables. The solution to this is to increase the number of passive devices the cables are tested with and show that the positive result is consistent across multiple passive equipment. I've been thinking about how to address this statistically, but run into other philosophical blocks.
My point is this, if you state that a cable (a passive device) can have a sonic difference from another cable, then you must (or risk being labeled a hypocrite) also accept there is the possibility that other passive devices can lead to sonic changes. But, if you follow this rationale, since any audio system consists of multiple passive devices, it becomes very difficult to point out that one passive device (e.g. a cable) is responsible for a certain sonic difference.
My only solution (at this point) is to approach this problem in a completely different way. Active devices are supposed to change the electrical signal, so blind test active devices.
If you have a negative result with active results, then you may (you don't have to) conclude that since you have a negative result from active devices, you will also have a negative result from passive devices since by definition passive devices are supposed to not change the signal and active devices do change the signal. Thus, if you cannot hear the difference between devices that do change a signal, it is not likely you will hear the differences between devices that are not supposed to change the signal.
If you have a positive result, then you can say "I've found a positive result at this (active devices) level so let me now go to the next (passive devices) level."
First, a cable is designed to be a passive device. It is, by design, not supposed to change the sound. Yet, people are hypothesizing that is not simply a passive device, but it is somehow changing the signal it is carrying.
So, in short, this is stating a passive device is actually an active device. But if a cable can be an active device, why not other passive devices like headphone jacks, headphone plugs, connectors, wire in amps, dacs, sources, the cases of equipment, solder, etc?
You might think this is ridiculous, but people have claimed these things make a difference. Certainly people buy expensive headphone jacks, headphone plugs, special RCA jacks, special solder, in the hope of not degrading their electrical signal flowing through their headphones.
So here is where I'm stuck. If you claim a negative result from a cable blind test, how can you attribute it to cables since there are so many other passive devices that can be changing the sound? How can you say it's not the RCA plugs on the amp that are contaminating your results? How can you ever claim a negative result is valid if you cannot demonstrate all passive devices in the test are indeed passive?
So what about a positive result? Again, you've got the possibility of contamination from other passive devices. How do you know it wasn't just the cables, but some interaction between the cables and some other passive device? Or maybe it was the passive device itself and not the cables. The solution to this is to increase the number of passive devices the cables are tested with and show that the positive result is consistent across multiple passive equipment. I've been thinking about how to address this statistically, but run into other philosophical blocks.
My point is this, if you state that a cable (a passive device) can have a sonic difference from another cable, then you must (or risk being labeled a hypocrite) also accept there is the possibility that other passive devices can lead to sonic changes. But, if you follow this rationale, since any audio system consists of multiple passive devices, it becomes very difficult to point out that one passive device (e.g. a cable) is responsible for a certain sonic difference.
My only solution (at this point) is to approach this problem in a completely different way. Active devices are supposed to change the electrical signal, so blind test active devices.
If you have a negative result with active results, then you may (you don't have to) conclude that since you have a negative result from active devices, you will also have a negative result from passive devices since by definition passive devices are supposed to not change the signal and active devices do change the signal. Thus, if you cannot hear the difference between devices that do change a signal, it is not likely you will hear the differences between devices that are not supposed to change the signal.
If you have a positive result, then you can say "I've found a positive result at this (active devices) level so let me now go to the next (passive devices) level."