[Table of Contents]


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [ARSCLIST] Cables- was Can 78s sound better than LPs?



steven c wrote:

When you folks are talking about "impedance" in relation to speaker
(and other sound-system) cables...are you talking about the impedance
of the cables as a transmission line? If so, does the frequency of
the tramsmitted signal get involved at all? As well, does this mean
that the impedances of both the output of the signal source and the
input of whatever is being fed would have to be matched to the
cables' characteristic impedance? I used to use 72-ohm transmission
line to feed a half-wave dipole, with a pi-network output feeding
my transmitter signal to the "house end" of the twin-lead (or 300-
ohm line to feed a "folded dipole")...But is the upshot of this
the possibility of having "standing waves" on speaker cables?

Steven C. Barr

I won't speak for others, but for myself: No, I'm not speaking of a transmission line. At the frequencies involved, simple RCL analysis is quite enough. That also applies to the effect of coiling the wires: there is no significant inductance and would not be even if the zip cord were unzipped.


Of course, if one were generating and detecting a couple of hundred KHz, there might be some significance. Barring parasitics, I'm not generating them.

Mike
--
mrichter@xxxxxxx
http://www.mrichter.com/


[Subject index] [Index for current month] [Table of Contents]