The higher the output V on a HU( w/an amp with equal or greater input V ) can yield a more precise and sensitive adjustment - but yeah your only trying to match the two in the long run ( since all or most amps/HUs are different ), higher Vs just give you more headroom to work with.
My question is why hasn't anybody ( company ) made a set of balanced outputs/inputs for hardware?! Is that what alpine has done? I have a ALP 4V HU to ALP V12 amp that is switchable nom/4V but is the HU always pumping out 4Vs?..anyway they should just make everything digital coaxial RCA so theres no "levels/clipping" to worry about~ yah know!
