parallel?
True. However if you're a purist and are going to use these for a
stereo, then splitting the amps into two amps each with separate power
supplies will give better performance. ANd also if you're fitting the
xformer into a rack, then two may have a lower profile than one.
Oh, one other thing. If you're gonna plug this into the regular wall
outlet, then having two separate transformers may allow you to use two
different outlets so that you don't overload a single outlet. But then,
if you're going to need that much power, you should have a special power
outlet installed.