hi bodfish
yes, i found the following reference on the arcam site; http://www.arcam.co.uk/advice-and-support/faq/solo-movie.htm
Is it possible to Bi-Amp the Solo Movie?
The Arcam Solo 5.1 has a rear panel set of discrete 5.1 pre outs which can be connected to Arcam power amplifiers (such as the P35) for Bi-Amping. However, if you are not using rear channels in your system it is also possible to internally re-route the rear speaker power amplifiers for Bi-Amping the front channels. This is performed by a simple adjustment within the software (See Handbook page 19 - Powered Surround Configuration) for details.