Edited by bigshot - 7/14/14 at 12:39am
so here silver is clearly a bad choice, and that's why it drives me crazy when people make generalizations like saying that "silver improves trebles". just because it did on the one IEM they tried it with, doesn't mean that all IEMs will react the same, and obviously they won't as it depends mostly on the crossovers and the type of driver. when I read that the LCD2 sounds is more balanced/brighter with silver cable I LOL, that thing has like perfectly flat impedance response. and if the impedance difference between copper and silver would actually change the sound just with the difference in damping, then obviously the headphone is driven by the wrong amp and something is wrong.
In these kinds of situations, people aren't doing comparisons with literally the only difference in the cables being the materials types, right?
I mean, silver is what, 5% more conductive than copper? But also more expensive. Silver IEM cables are probably liable to be thinner, and who knows what the construction differences between actual products actually is. Even with all else equal, 5% less cable impedance should usually be no big deal.
well I'm sure that just doing some braids, having some shielding, or changing the length or thickness of the conductor part of the cable is what makes a cable good or bad for the proper needs, not the choice of metal in it. and that's probably what makes enough differences to be audible. I was talking real variations but of laughable magnitude, that's why I had to put so many "slightly" in my sentences ^_^.
I've never seen braiding recommended on electrical grounds - may look pretty though
EE's spec twisted pairs, star quad, coax, shielding - for electrical performance, immunity to external field coupling
Litz wiring may be "braided" to move the individual conductors evenly over the radius of the cable - but it is then used as a single electrical conductor - and headphone cable are too a small gage wire to have audible skin effect loss
braiding is likely to cause measureable increase in channel cross talk compared to normal EE cabling practice like individually twisted pairs for each channel
I believe star quad will have same or superior electrical characteristics for similar wire awg and insulation thickness - the "inter-8" weave page gives no data - the shielding pdf only claims mechanical improvements when you recognize that star quad has the same conductor count when both are used as 2 conductor cable
Only thing I can think is that he's suggesting people tune to the equal loudness curves... since our sensitivity to those frequencies is higher, they are reduced in volume, so as to even out the overall sonic signature. Which would account for why so many show a dip in that frequency range.
Fletcher Munson only affects about the last three octaves of human hearing. As the frequencies and volume rises, Fletcher Munson becomes more important. -10dB or so splits the difference in the sensitive zone, and above 6kHz, a little boost is beneficial, especially for people 50 and over. If you can hit measured flat, try a slope down around 10kHz from 2kHz to 6kHz and a slope up to +10dB from 6kHz to 10kHz and +10 flatlined above. It's a compromise, a DSP that dynamically adjusted it would work better, but it is a good compromise. Try it. It allows you to play music at loud volumes without fatigue.
More likely, it could be due to the way full size headphone enclosures (especially closed ones) tend to interact with the acoustics of the outer ear. Perhaps the fact that the ears are covered affects the ear canal resonance, which is normally a large peak centered at ~3 kHz.
Actually, equal loudness contours affect the low frequency range significantly. 1 dB of increase in sub-bass SPL results in roughly 2 dB higher perceived loudness in the 20-80 phons range.
Definitely agree - I am just speculating what he might have meant.