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Message: <blockquote data-quote="keep_hope_alive" data-source="post: 8238213" data-attributes="member: 576029">small voltages have poor signal-to-noise ratios.  figure with a 100mV signal you have to max out the gain in order to get the same signal that a 4V signal would with gain at minimum.  lower amplifier gain = less noise.you want gain as soon as you can get it - i.e. at the head unit.  then try to keep reducing gain at each piece (crossover/eq/amp).  the result will be minimal noise (assuming the head unit is of good quality).otherwise, you can get additional gain out of a crossover/eq to treat it as a line driver - but you still want it to get the highest signal possible as soon as possible.  I consider 2V as a minimum head unit output.</blockquote>

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