Yes, The higher the preout of HU, greter the clearity & lower the noise levels. |
But it also counts on the hardware specs of Preout, like 7200MK II has gold plated pre-outs which creates very less disortion.
gold plated connectors is good as far as corrosion is concerned gold remains immune to it. you might not be surprised if i say 100 percent of electronics are soldered which is nothing but metals known as lead and tin.
100 percent of all circuit boards in any electronic component consist of copper circuits and conductors.
so gold plate on outside adds negligible to nothing in overall quality of a component but the corrosion ,gold plating remains clean and conductive for longer duration and of course aesthetic part also cannot be overlooked.
higher the preout of HU, greter the clearity & lower the noise levels.-apparently or practically it sounds right but the grass greener on side is not always safe.
what if the amps were designed for lower level of sound signals (high sensitivity).
what if high voltage preout is is throwing high levels of noise also.
truth is there is nothing much relations between high pre-out or lower noise.
fortunately all those exhorbitant head unit have faithful high level preout.
but basically noise and clarity begins from the source of sound itself like cd,usb,dvd,radio or whatever. if the initial source had some issues it will be multiplied or amplified proprtionately.
but if the head unit had no proper or good noise handelling no matter how high the preout is the noise will be evident.
the notorious ones to add noise and distortions are digital to analog convertor if they are not much reliable one included in any given circuitory not even god can help for good results.
then comes the sound enhancements like bass treble boosters, equalizers, surround and such they all add up noise and considerably if not well designed.
and the list goes on from preout to amps to speakers.
just for the sake : amps have generall gain of amplification of 30db or 30 times.
so if you apply with 2 volts of audio signal from preout it would provide 60 volts to speakers.
if those 2 volts had 0.1%,1.0%,10% of noise ( which is common figures general audio components ) they too would be amplified as 0.06,0.6,6 volts respectively with the said 60 volts from amplifier.
and did you know amplifier itself have noise figure of same levels which would be amplified adding to the pre out signals.
that makes the overall noise to double as 0.12,1.2,12 volts respectively,
if we consider the highest noise 12 volts into 4ohms speakers
12/4= 3.0 ampere(voltage/resistance =current)
12x3=36watts( voltage x current=power)
36 watts is definitely audible and loud enough for human ears.
ps: that was all about noise, and distortions are even worse which add up with the sound along with noise. if not carefully considered while selecting components, hope you understood where it leads.