I just had a nice long chat today with Darren Censullo, of Avatar Acoustics, the US distributor of AMR. Darren said that the SE upgrade should be available in the US at the end of the month or in a few weeks, putting it in April sometime. The price has not been set yet, primarily due to AMR still ironing out production costs for the capacitor portion of the upgrade. The upgrade will be available as a retrofit into our existing DP-777s. Customers may either ship their units to Avatar to have them install the upgrade, or buy a kit for those who are handy to install themselves at home. Some soldering skills will be needed for the caps. The digital board and tubes will be essentially plug-n-play. The upgrade comes in three parts:
1.) New output caps. This is a design proprietary to AMR. Darren said they might use copper foil and paper and oil, and a wood case (!). He didn't sound sure about the internal materials though. The old caps will have to de-soldered and gently rolled on the board to break the adhesive. The new ones must be staked down with something similar before soldering.
2.) NOS GE5670s tubes (same as WE 396A) will be provided. The pin-out of the 5670 is different from the existing tube's pin-out, so there will be adapter sockets included which Darren says will have some "noise filtering" components built inside them. The tubes also have a different diameter so they will include new copper shields and damping rings. These tubes will be available separately for those that don't want the other two upgrades.
3.) The biggest change will be a new Redbook four "core" digital processor card that will replace the existing "daughter" card. Note: the processor upgrade ONLY affects Redbook; the existing HD section remains unchanged. (However, HD playback will, of course, be impacted by the new caps and tubes, as will Redbook.) The existing 777 design uses the last-generation multi-bit DAC from Philips, the UDA1305. These weren't quite up to the original TDA1541A (Crown versions or not) in performance, but close. The new board will have four UDA1305 units running in some sort of averaging or combining technique along with Philip's Dynamic Element Matching to tweak performance to higher levels, approaching, if not equaling TDA1541A Double Crown performance.
I inquired about DSD. Not this go-'round. The MK II unit will be designed for DSD and DXD, but won't be available for at least another year. It will be a far more extensive mod.