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General_Failure posted:Because I don't know what to search for I don't know the answer to this. What are the dimensions of the really old and the newer standard stereos? I want to figure out what I can fit in the Niva. I'm not overly sure but the tape deck that's in it looks like the newer size one but I can't be sure until I take a ruler to it. Well i dont know if im really understanding your question as far as 'newer' standard stereos but here's DIN: http://en.wikipedia.org/wiki/ISO_7736
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Apr 25, 2013 16:02
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So that S4 situation got me to wondering about the relative merit of bothering to figure out what is going on pre-amp instead of just doing line level converters from the factory amp output. My line of thinking is i dont see a problem with using line level inputs as long as that signal is worth a crap, i.e. not noisy and not going into distortion/clipping. And THAT got me to wondering what kind of resistance a high-level input is? I.e., is the high level input on an amp such a high resistance that there is not much current coming out of the amp producing the signal, and it will never be working hard? Because, i see the typical situation where you T off of the factory rear speaker circuit to a sub amp, to be different because there is still a speaker load on that circuit and you can still crank it up to where the factory amp sounds like poo poo, and that will affect the other amp. But if there is no speaker on that circuit and the high level input on the next amp is a high resistance, i would think that signal should stay relatively clean? Thoughts on this?
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May 10, 2013 23:40
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Rhyno posted:Theres's a Kenwood deck on Crutchfield for under $90 that looks like it will get the job done but I'm really out of the car audio scene these days. No link? Having to find it myself:  HehLowclock posted:Usually amps have high enough input impedance that they might as well not be there to whatever they're connected to. Nothing close to what you find on something like an opamp, but I think the lowest stated input impedance I remember seeing on a car amp is something like 15k ohms. The speaker being there shouldn't really make any audible difference in the end unless you've got the gains set wrong. That's kind of what i figured. I probably would have figured this out myself at some point if i ever used high level inputs but i never seem to get those connectors when i scrounge used amps.. 
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May 12, 2013 21:49
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