I just bought a PLX 3002 to replace my Carvin DMC1000 power amp. I've noticed posts in this forum about guys not being able to drive their PLX's to full volume with preamps that don't put out a certain voltage (usually Tech 21 Sansamps, which I also use). Why is it that the input sensitivity of the PLX series goes up as you move to the higher models whereas the Carvin DCM series all have the same input sensitivity (1.000 volts at 4 ohms)? It seems like a law of diminishing returns: as you get an amplifier with more power available, the harder it is to drive it with your preamp! I guess there's a modification available to bring the sensitivity down to .775 or so, is this something you can do yourself or any repair shop can handle? Other than this potential issue, I think this amp should be quite a step up from the Carvin.