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Naim Lumina - 300K resistor connecting + and - wires ? Snake oil or zobel ?

Practical cable can from around 10 Ohms (Litz types and specialist coax) to about 500 Ohms.
The usual cable termination box attempt at RF termination is something like 100 Ohms in series with a 1nF capacitor
This might have some effect if you live next door to a radio amateur
 
Jim Audiomisc said:
I agree that it messes about with the sound. But that's my point. If you look at frequency responses of valve amps with significant output impedence into typical speakers you can see that the response develops a profile like the Alps due to the impedance interaction between the amp's output impedance and the speaker impedance. This should have a quite marked effect on the sound in many/some cases.

Of course, if you choose a well designed valve amp with low output impedance this effect becomes minimal. But amps with little or no feedback of a kind that get raved about in magazines for their 'sound' uusually show the effect. It becomes hard to credit that this *isn't* what they then bang on about as wonderful valve sound. :)

Didn't 'HH' once see a SS amp that had a 'creamy valve sound' knob the user could wind up? 8-]
Click to expand...

Whilst obviously the added resistor will cause the same frequency response aberrations as a high output impedance valve amplifier my point is that this does not in any way mimic the sound of a valve amp in practice.. I've tried it many times and with a range of series resistances. It just spoils sound quality by muddying things up and lessening resolution and grip. Obviously the precise effect will vary considerably with different speakers that present differing loads.

HH and several other companies made SS guitar amps with "valve sound" effect claims yes.
 
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