Dwmdc: At the risk of providing you with information that is not completely on point, I run a pair of 803s's with an mC402/c45 and get good results. I believe the C45 and C46 are fairly similar sonically in a two channel system with the respective filters switched out. The 402 has plenty of power left over. Although the 803d is slightly harder to drive than the s due to the additional low end driver, it should not be an issue. I was looking across the 803 - 802 range and the 402 drove the 802D's with no problem in numerous tests reaching peak spl levels of 110 db - a level right at the brink of destruction for this type of speaker - at least if sustained for more than a minimum period of time. As to sound - the b&w sound is going to swamp out the differences in most amplifiers (unless you go to a really 'tubey' (i.e. poorly designed) tube amp.) In my opinion the filter options of the c46 is a nice feature - while there are many recordings out there that sound good at hi spl's and need no filtering, there are also those that can benefit from the addition of preamp filters.
