@ Almarg/Herman........
Well, a couple things are certain here.
1) first and foremost, it was classless to get personal and call names with Herman. My sincere apologies on that.
2) I've become completely lost in what has been said by me, by others. What hasn't been said, yadda yadda yadda. I know I have a habit of letting my thoughts move faster than my fingers and too often key words such as "maximum", "maybe", etc etc. get left out and totally screw up the intended meaning.
3) I've fallen prey to remembering particular specs incorrectly and assuming the numbers were correct without going back and verifying by actual math.
4) I just don't care anymore.
Herman, you asked me to stop. At first I was acting on emotion and didn't want to. But I calmed down and decided to stop. But I keep coming back to read more about horns and keep seeing new posts directed at me. Posts filled with animosity, deservedly so. To a point. Is it okay to state at this time that you've more than made your point? I'm stopping. Done. I made a few mistakes along the way. You're not the idiot I too quickly assumed. Admitted. Done.
One last attempt at an amiable contribution on BAT amplifier power.......
Um, well, you guys figured out where the 26dB gain number came from. The 400W was a partial guestimate based on (incorrect) memory, partially from a chart taken from an older Music Fidelity paper. Had nothing to do with actually running the numbers, not knowing actual input sensitivity.
I could have sworn a VK-600 was the same as a pair of VK-250 in one chasis. Nope, remembered that wrong too. Slight differences there.
But I found this for you guys to chew on and play with. (since it seems you're kind of 'into' figuring this out.)
BAT has an old page of specs that can still be accessed directly. http://www.balanced.com/products/amp/specs.O.shtml
Obviously the simple act of paralleling doesn't DOUBLE (definitely wrong there) but the power does go up. Interesting.......
Compare the charts for the VK-250 and VK-250M. Same gain. Same input sensitivity. 50W difference at 8ohm. Note also the VK-500 and VK-1000. Same gain. Same input sensitivity. 100W difference at 8ohms.
I point these out for you to play with because I KNOW (no really, I mean I REALLY know this time) that the only difference in these two comparisons is the internal paralleling of the inputs and outputs. No switches to be flipped. No changing rails. In fact you could take either stereo unit and convert it to mono without ever opening the chasis.
FWIW