Re: Eclipse 7100?
The preout voltage alone will not make it sound better.
I have the CD7000, last year's model. It's a nice sounding HU with alot of tuning options.
Crutchfield has a good amount of information, as well as a copy of the owner's manual that you can download.
2010 Nissan Maxima SV Premium with OEM DVD/Navigation HU
AudioControl: DQ-61, 6XS
Hertz: Mille ML 280
Scan-Speak: Revelator 18W/4531G00
Audiomobile: MASS 2012 S24
Boston Acoustics: GT-475, GT-2200