I'm also confused as I was told that the 400s would remain as is in the lineup. Now, if they are upgraded to 400SV; what makes them different than the DMA-500? ; I have a thought.
The DMA-500s are almost at the end of their limited production run (as ack stated); So, the 400SV will remain as the flagship mono going forward with some but not all of the 500 tech for a price between the current 400 and 500 offerings. (My guess )
Again without an updated and descriptive spectral website its tough for the consumer just looking at a model #. But, looks like the amp line up will be .
DMA-240
DMA-280
DMA-300SV (Replacing the RS)
DMA-400SV (Replacing the RS)
DMA-500 AR ( Limited Edition w/possible differences than the 400SV but, we don't know for sure yet
Pre amps
DMC-30SC ( A single ended only version of the SV technology based DMC-30SV (Balanced pre amp)
Source
SDR-4000SV CD Player based on the SV output stage.
And in the Spectral fans dreams... An SV based phono stage and the SDR-5000 DAC based on SV technology
Hey its good to dream right?