preamp volt question

hi, as i mentioned a week or so ago that i was looking for a dvd player for my car. well today i saw this nice alpine IVA-D105 but it has only 2 volt preouts now if i go with that instead of the pioneer avh7600dvd like how big of a difference will there be with 5volts compared to the IVA-D105 2 volt preamp volts. the amps that when my system will be are: 2 alpine pdx-4.100 , 1 alpine pdx-1.1000. ( and yes i choose to do a alpine system cause i was having a problem getting us amps.

the only problem you may have is the lower voltages may be more susceptible to engine noise. Most people that do the alpine headunits get around this by running the h701 processor and doing fiber between them.