Archived from groups: rec.audio.pro (
More info?)
Arny Krueger wrote:
> "Kevin Aylward" <see_website@anasoft.co.uk> wrote in message
> news:GEBke.90318$a9.76393@fe3.news.blueyonder.co.uk...
>
>> Ratt Mahem wrote:
>
>>> In the Feb 2204 Guitar Player, they were hawking a "Analysis Pro
>>> Plus Oval Studio" cable for $299. 300 bucks for a 10' guitar
>>> cable! It even won the "Editor's Pick Award" and was described as
>>> "Warm, full-bodied, and liquis smooth," and truely "reference
>>> quality."
>
>> Try a cheap standard TV co-axial cable as a guitar cable. You might
>> well be be surprized.
>
> Guitar cable is an example of an inductive high impedance
> source (the pickup) driving a capacitive load (the cable).
> What would usually be trivial changes in cable capacitance
> could make an audible difference.
Indeed it does, as do the facts.
>
> I'm kinda surprised that there aren't more guitar cables
> made up of low-capacitance cable and a switchable variable
> capacitor load.
Yep. The first time I actually tried this, I was quite surprised. Much
better treble. The numbers actually bare this out. A 2H pickup is some
inductance.
I just did a little SuperSpice simulation on an RG-50.
Pickup model as a 5k resistance with 2H inductance, cable into a 1Mohm
load, there was a 15db peak at 10Khz, 3db down at 15Khz, then rapid
rolloff. Doubling the capcitance/length moved the peak to 6.3Khz, 3db at
10Khz.
I don't think anyone can deny the audibility differences of such peaks
and rolloffs.
Do you have any idea of the inductance and capacitance of mics? I did
some runs with guesses, but it don't seem to be audible as far as the
sims go. You need about 100mH to get a decent audible difference, but I
don't think mics are going to get much past 1mH, if that. Its hard to
get the data, and I havent investigated much on this before.
>
>
> It's a completely different situation than line-level
> interconnects.
Yep.
Those that keep questioning you and me seem to belive that we are
denying *all* differences, just because we claim that *some* differences
are not audible. The err..difference, is that we know when there is a
difference and when there is not.
Kevin Aylward
informationEXTRACT@anasoft.co.uk
http/www.anasoft.co.uk
SuperSpice, a very affordable Mixed-Mode
Windows Simulator with Schematic Capture,
Waveform Display, FFT's and Filter Design.