Which is "better" 2v, or 4v? Im looking at buying an Alpine CDM-9823 unit for my 95 talon, but I'm not sure as to whether I should spend another 150 bucks and just get the CDA-9830...(the CDA-9825 doesn't fit)
4V is better. 2V won't necessarily generate audible noise in your system, but it's more likely to. Also, with 4V allows your gains to be set lower, meaning the noise floor is lower b/c the amp doesn't generate noise into the system by turning the gain up.