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Conference hips::uk_audioo

Title:You get surface noise in real life too
Notice:Let's be conformist
Moderator:GOVT02::BARKER
Created:Thu Jul 28 1988
Last Modified:Mon Jun 02 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:550
Total number of notes:3847

233.0. "Noise after cable change" by SAC::STEPHEN_I (Production Systems Marketing Group) Thu Nov 22 1990 16:00

I've replaced my CD to amp interconnect with a P1-Icon Gold, and 
replaced my speaker cable with Mission Cyrus Solid Core cable.

Since changing, I'm getting a low humming noise when new music is
playing.  It sounds like the noise I used to get when I used the 
turntable without connecting the ground cable to the amp chasis, but
I'm no longer using the turntable. 

I'm going to swap back to the original interconnect tonight, and see 
what difference it makes, then I'll try the speaker cables.

Any other thinks I should check ?

Thanks,
Iain 
T.RTitleUserPersonal
Name
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233.1SAC::STEPHEN_IProduction Systems Marketing GroupFri Nov 23 1990 09:1911
	Played about with the cables last night and it would appear that
	the new cables simply highlight a noise problem with the current 
	amplifier.  With the Cyrus I (Used with Wifes permission then 
	taken away again) the problem didn't appear.

	In general, is the length of the mains leads and crossing of mains
	leads with interconnect and speaker cables something I should be 
	careful of ?

	Iain.
233.2FORTY2::SHIPMANFri Nov 23 1990 11:439
Avoid runnning mains lead alongside interconnect cable.  Crossing is OK,
especially if at right angles.  Also, never run speaker lead alongside
interconnect cable.  Mains lead and speaker lead interact less but it's still
worth avoiding close parallel runs if possible.  Mains lead length doesn't
matter much.  Arguably, for power amplifiers the shorter it is the better, but
then you should also be paying attention to the house wiring to the socket from
the consumer unit.

Nick