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15' interconnect ok? - Page 2

post #16 of 18
2/5/05 at 5:26am
What value are you using as your inductance?

Also, the effects of capacitance are not just limited to HF roll-off. They can cause many output stages to oscillate or perform suboptimally.
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post #17 of 18
2/8/05 at 12:27am
e-dawg, to be honest, I don't remember. That run was in my previous house, feeding source info to the garage. I do the same now, but the runs are only about 30 ft. I don't think I have ever had a component go unstable, what does it sound like?

I did discover a problem with my 16 ft cables. I was getting a minor hum from the speakers. Some of it was ground loops (always a danger with distributed components). Even after I chased that down, a slight hum persisted. It was not loud, but if I got within a couple of feet of the midrange driver (with the music off) I could hear it. Naturally I could not rest until it was killed Moving the preamp closer and going to shorter analog cables got rid of it (now the digital cable is 40 ft and makes a pass outside the house). As best I can tell I am picking up something from the very large transformers in my amps. Since the cables go straight to the high gain amps with no attenuation, anything that gets into the cable will show up. With an integrated amp it would have gone unnoticed. Now I have to figure out a better solution. Programming a remote for the 902 looks like the solution for the time being.



gerG
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post #18 of 18
2/8/05 at 2:09am
Quote:
Originally Posted by jefemeister
It's generally frowned upon to have ferrites on an analog cable. I've never tired it, but it supposedly will limit the dynamics of the music. That seems to be the popular opinion anyway.
it eliminates noise in higher frequencies, in the mhz range. i doubt even anybody here would be able to tell

though as e_dawg said, it wouldn't help emi, though emi is easier to take care of by simply moving away from the source.
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