FrankHarveyHiFi:
knightout:The thing is I do not see why the subtle and not so subtle improvments claimed for different cables should not be readily measurable and quantifiable. If they work it should be established fact not rely on trained ears or belief. Music can be measured, thats why it can be recorded.
How would you go about measuring soundstage depth? Width? Ambience? And how natural an instrument sounds?
If you believe the effects were recorded in the first place, then comparison to the original recording shows how faithfully they have been reproduced. If you believe those effects are the product of or been enhanced by the hifi colouring the music then they can be measured by comparison to the original and to other cables. The effects might not be measurable at the cd output, the amplifier output or at the speaker, because they are partly dependent on speaker position and room acoustics. But for different cables to make a difference unmeasurable at the speaker but perceivable by the listener you would have to believe that the cable was having its effect after the speaker but before the listener by altering room acoustics, which would be odd.
Perception of sound stage depth, width, ambience are from what I gather dependent on positional cues like interaural time delay and interaural intensity difference, and the amount of direct sound and reflected sound you hear and the amount of reverberation, direction and frequency of and timing of reflected sound, etc.. Some of that information is recorded and can be checked for, but a lot is dependent on speaker colouration, speaker placement and room acoustics which should take effect irrespective of cables. How natural an instrument sounds is again going to be partly due to what been recorded. But since studio recorded music usually sounds bad in an acoustically dead room, it is again going to partly dependent of speaker colouration, speaker placement and room acoustics.
If you believe that changing cables dramatically effects room acoustics, so takes effect after the speaker but before the listener, you could added recording at the listening position for a/b comparisons between cables. Obviously you do not want to create a perfect reproduction at the listener position as acoustically dead rooms sound bad, so you can not compare the hifi at listening position with the recording and if the two are identical view it as a good thing, as it will not sound pleasant. You might also have to measure a lot more things like direction of sounds for a truly accurate comparison. It would be odd if cables made this claim, cables that improve sound merely by their presence in the room, no need to connect them to anything. But some hifi accessories do indeed make such claims like Brilliant Pebbles. Other products that may require the listener to wear them for best effect like the Van den Hull health ring room acoustic conditioner, maybe truly unprovable / disprovable by measurements and require double blind tests using a placebo copy.