just so you know, it is 4volt and 2volt //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif
the 4 is just better. all the way around better. better signal, clarity, everything.
think of it as an amp. which is better: a 500rms Fosgate or a 250RMS fosgate? Answer: the 500. why, just because it is more of a good thing.
**i am not taking into account money and all other variables. a 2volt can sound as good as a 4volt if different brands/setup right/etc...