Dave,
I ran my Nautilus 804 with a BAT VK-200, 100W into 8 Ohms.
No problem there, power for anything with plenty to spare, and with pretty big rooms. I think that BAT power is very conservative [felt more like 150W].
I also ran them with a Classe CA-101 prior, also @ 100W into 8 Ohms.
No problem there either, a little strained at higher output, but all good.
The Rowland I had was a Concentra II @ 150W, not the 250W Concerto.
I had really high hopes for the Concentra II, but ...
I ran my Nautilus 804 with a BAT VK-200, 100W into 8 Ohms.
No problem there, power for anything with plenty to spare, and with pretty big rooms. I think that BAT power is very conservative [felt more like 150W].
I also ran them with a Classe CA-101 prior, also @ 100W into 8 Ohms.
No problem there either, a little strained at higher output, but all good.
The Rowland I had was a Concentra II @ 150W, not the 250W Concerto.
I had really high hopes for the Concentra II, but ...