I emailed Peter. He said
"The outputs of each stereo amp could be run in parallel (red to red, black to black) offering somewhat more current per channel. The input signal would be split using a "Y" splitter in from the preamp. It's not really a monoblock but it's the only option for the Aleph 30. The Aleph 60 is already a monoblock design."
Guess that answers it.
Thanks for your replies!