The upcoming KRELL KSA i400 amp was measured recently with the following numbers according to my dealer.
- 400 Class A at 8 Ohm
- 800 (400 Class A) at 4 Ohm
- 1600 at 2 Ohm
- 2200 (I think) at 1 Ohm
When I had my Thiel CS3.7 (until 2 months ago) I used the CODA #8 and the KRELL DUO 175XD. Both amps were able to work in the 2 Ohm region. I could definitely hear the difference compared to an amp that could not deliver continuous power at the 2 Ohm region. I felt it was in the area of bass weight at all volume levels.
All that gear is now sold (KRELL sold today).