Definitely Monitor Audio cables and they did give some amps a hard time. Back in the day we used to make those up with ring main cable in parallel, taped together, with the ring main cable used for the bass driver and Litz for the HF.
Location: Near Saffron Walden, Essex
Posts: 7,090
I'm Dave.
Definitely Monitor Audio cables and they did give some amps a hard time. Back in the day we used to make those up with ring main cable in parallel, taped together, with the ring main cable used for the bass driver and Litz for the HF.
Those cables were designed to have a characteristic impedance of around 8 Ohm, in the mistaken belief that in doing so they would 'match' the nominal impedance of the speaker. Interconnects cannot be treated as transmission lines at audio frequencies, because the concept of characteristic impedance does not apply at audio frequencies (or to any frequency where the wavelength is longer than 6x the cable length; for example at 10kHz, the wavelength is approximately 20km, so the cables would have to be over 3km long!).
To achieve the low characteristic impedance, the Monitor Audio cable uses a woven Litz construction: having a very high capacitance per unit length and a very low inductance per unit length. The latter is desirable the former is not, and can cause instability problems with some SS amps. However there ought not be any problem if used with a valve amplifier, nor should there be a problem if used with electrostatic speakers (provided of course the amplifier can drive ESLs).
Barry
Location: Dagenham Essex
Posts: 11,215
I'm Allen.
Location: Dagenham Essex
Posts: 11,215
I'm Allen.
£ $ or Euros and how much
I had a nightmare trying to sent a parcel using the Post office , took me 2 days to find one that was open
This is my local main post office opening times
Heathway
28 The Mall, Heathway, Dagenham, Essex
RM10 8RE
How to find us
Opening times Normal Seasonal
Mon Closed
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Location: Seaford UK
Posts: 1,861
I'm Dennis.
I don't recognise your wavelength calculation.
To me it is much more relevant that transmission line theory applies when a source Z is equal to the load Z, and in audio signal transfer, both for signals and for power to the speakers, the source Z is many times less than the load Z, and so Xsmission theory does not apply.
I remember arguing this point with my then Telecoms lecturer in about '79.