look at it like this! With a 2 volt signal going to your amp is like running 50 foot of rca cables to your amp. And running 5 volt preouts would be like running 10 foot of rca cables to your amp.
To start, that's not even a good example.
The levels of current are so small at preamp levels that voltage drop as a result of the wire will be negligible at best.
All the headunit does is send a signal to the amp but how strong and clean the signal is depends on how clean the amp can deliver the output.
That statement doesn't even make any sense.
Why would the headunit's output depend on the amplifier's output //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif
But, since I think you were trying to say that the amp having a "clean" output depends on the "strength" and "cleanliness" of the signal from the headunit, let's examine that a minute.
Yes, the amplifier's output is dependent upon the strength of the input signal. But this is
EXACTLY what the gain knob on the amplifier is for ! To allow the amplifier to provide full power output with a wide range of input signals. The fact is that most amps on the market can make full power output with as little as .2 - .3V. So the 2V preamp output isn't an issue as far as the amplifier producing full output power, and the 5V is not any "better" here since the 2V is more than sufficient.
The
only way the signal strength is going to affect the "cleanliness" of the amplifier is if that amplifier is so poorly designed that it produces audible noise with a higher set gain due to the diminished SNR. However, at this stage in the game there are very few amps, even on the low end market, that this is really much of an issue with anymore. And really all it indicates is that you have a poorly designed amplifier that needs replaced as this is a fault of the amplifier, not the signal strength.
About the only things the input signal strength affects; the gain setting.
Lastly, a 5V signal is not inherently "cleaner" than a 2V signal. There's no inherent "cleanliness" or "sound" advantage to a 5V signal over a 2V signal.
All a amp does is boost the signal coming in so how strong and clean the signal is means alot as to how good your music will sound.
See above.
There is nothing that makes a 5V signal inherently "cleaner" or "better sounding" than a 2V signal.
And the
strength of the signal plays a very limited roll in the amplifier's output, primarily only dictating where the gain knob needs set. That's about all.
Now.....stop trying, you're wrong.