Class-A may not be the right thing for you if the amps are on all the time, they will generate a lot of heat (they are not proper Class-A if they don't).
But there must be something wrong if a 350W Jeff Rowland amp isn't enough. I would try other options, remember that the Krell only gives you a 3db upgrade.
But there must be something wrong if a 350W Jeff Rowland amp isn't enough. I would try other options, remember that the Krell only gives you a 3db upgrade.