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Message: <blockquote data-quote="HCCA" data-source="post: 2299252" data-attributes="member: 571196">Sorry, wrong! Induced noise has to overcome, or "push through" the signal voltage to be able to be reproduced. If you think that signal voltage has only to do with level matching you have little or no education of electronic theory. The higher the output voltage, the more difficult it is for radiated noise to enter the signal path. BTW, what do you call a "band-aid fix??? If I were to use fiber optic connections in the system...Is that a band aid fix, or a better way of doing business??? Can you induce radiated noise across a fiber optic cable? Neat trick if you can. I'd pay to see that one!"if you have noise, higher preouts is just a bandaid for what is wrong in the system" .....Just what is it that is "wrong" with a system that picks up noise, if not high output impedance/low output voltage? Yes, you can route the signal wires away fron the power wires. Yes, you can use good grounding. Yes, you can match your signal levels. And, when you still have induced noise in the system....what then??? An output impedance of 4 ohms, and a signal voltage of 5 volts...such as the M88 Pioneer unit (old school) will reject said noise. There CANNOT be radiated noise in a system with a HIGHER output voltage than said radiated noise! A higher output impedance allows noise a better chance of being picked up....almost like a magnet. A low 5 ohms, or less, output impedance will be more difficult for noise to be picked up...much, much more difficult (vs. 250-1000 ohm).No, you will not "see" a constant 4 volts in program material. You will, however, have a higher signal voltage than any radiated noise. A signal voltage of .025 volts is no match for radiated noise of .5 volt of alternator whine!!! 4 volts of signal will push out that .5 volt, even if it dips to .5 volt on regular musical passsages. Repeating what I've said before, how do you get around clipped output from any unit without a switching power supply (which you will ALWAYS have)???? This clipping will be evident to even the most neophite novice. Said clipping will damage drivers at max volume, if amplified in an average high powered system.Not that it's necessary, but I have 2-double master degreed engineers who agree with me. Names Richard Clark &amp; David Navone. I also worked on guidance systems for aircraft in the military, and two years of car stereo competition under my belt....whach you got???</blockquote>

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