HEAD UNITS AND SOUND QUALITY

Cheap, low voltage on the out puts are suspect in my book.
I dont hear any differences with set system in High output from my HU on music, above 3volts (gain amp 15-20%) and normally set from play BT/AUX output about 0,5volt from aux, and about 1 volt from USB (GAIN AMP set 55%) No diferences, Norrmally? Alpince cde 178bt
 
I’m not sure if we’re talking about the same thing. I referred to the hu voltage output being 3v-5v. This greatly affects sound quality having the higher output.
 
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nelpastel

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