Ok, so I've got a Pioneer Deh-P520 HU, and have been considering getting a Pioneer Deh-P430 HU (I think it looks better, plus it has plastic buttons vs. rubber buttons) and selling off the P520 for a few bucks. However, the only difference I noticed between the two is that the P430 has 2v preouts, and the P520 has 4v preouts.
So I got to thinking, what exactly is that extra 2v doing? Am I going to lose anything going down to 2v from 4v? Or is the 4v preout just a marketing gimmick from Pioneer?
Also, has anyone used an Alpine MRD-F752 amp? I've got an MRV-F450 now, and may be able to get the other VERY cheap, but am unsure whether to keep it or just sell it off for a quick buck. It would be used on 1 set of Pioneer TS-D170R's, 1 set Pioneer TS-D690R's, and an Infinity 1030W in a 1 cu ft enclosure.
Thanks for any thoughts/comments!