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Message: <blockquote data-quote="keep_hope_alive" data-source="post: 7764877" data-attributes="member: 576029">you can see the gain knob starts at 6V and ends at 0.2V.  that is to correspond with the HU preout voltage from the HU.  some factors to consider are what volume level you use on the HU.  a 4V HU only achieves that at full tilt with a 0dB recorded signal (which is fairly common anymore).   but if you only use 3/4 volume, you won't ever get that output from the HU.to be safe, you can start with the input sensitivity at the level of the HU output. that is conservative.  you may find it's louder than you want and you can turn it down.   if you find you want more output, then you carefully proceed with meters, scopes, or calculations to determine what the actual HU output voltage will be and what unclipped power you can achieve.</blockquote>

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