"Dave Plowman (News)" wrote in
:

In article ,
Rich.Andrews wrote:
For a piece of co-ax a couple of feet long or so to remove some of
the bass - which is what sounding thin means - would be quite an
achievement. Unless, of course there's been a small series capacitor
added somewhere.


Or possibly a resistor from the center conductor to ground.

Considering the low output impedance of well designed equipment, more
like a short? ;-)


There is some equipment that is well designed but designed to drive a high
impedance load. In cases like that, loading it down with 600 ohms instead
of something like 50k ohms will result in a roll off of low frequencies.

r


--
Nothing beats the bandwidth of a station wagon filled with DLT tapes.

In article ,
Rich.Andrews wrote:
For a piece of co-ax a couple of feet long or so to remove some of
the bass - which is what sounding thin means - would be quite an
achievement. Unless, of course there's been a small series capacitor
added somewhere.


Or possibly a resistor from the center conductor to ground.

Considering the low output impedance of well designed equipment, more
like a short? ;-)


There is some equipment that is well designed but designed to drive a
high impedance load. In cases like that, loading it down with 600 ohms
instead of something like 50k ohms will result in a roll off of low
frequencies.

In which case changing the interconnect will make not a scrap of
difference.

Have you got any examples of domestic equipment with an 600 ohm input
impedance?

--
*Forget the Joneses, I keep us up with the Simpsons.

Dave Plowman London SW
To e-mail, change noise into sound.

In article ,
Rich.Andrews
wrote:
"Dave Plowman (News)" wrote in
:


Considering the low output impedance of well designed equipment, more
like a short? ;-)


There is some equipment that is well designed but designed to drive a
high impedance load. In cases like that, loading it down with 600 ohms
instead of something like 50k ohms will result in a roll off of low
frequencies.

I'm not sure if things have changed. However the normal assumption for
domestic audio sources in the 1970's and 1980's was that the source (CD
player, Tuner, etc) should work as per spec into loads down to 10kOhm in
parallel with 1000 pF. The assumption being that any preamp input would
have an impedance that was this, or higher.

So far as I know, 600 Ohm input impedance would be unusual in domestic
equipment. Although I think some items may use it with balanced inputs. If
so, I'd assume the source would then be expected to use a matching output.

Hence in domestic practice. I would assume that having a 600 Ohm load on a
normal single-ended output would be unusual and not recommended.

Slainte,

Jim

--
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Audio Misc http://www.st-and.demon.co.uk/AudioMisc/index.html
Armstrong Audio http://www.st-and.demon.co.uk/Audio/armstrong.html
Barbirolli Soc. http://www.st-and.demon.co.uk/JBSoc/JBSoc.html