I am not sure this can be done. The pre out is a Tape output and IIRC it is not attenuated, but on order you can have it attenuated as well. So in theory you could use it do drive a power amp but it may have a different output level than the internal "output" of the preamp stage to the power amp gain stage. The reason is that the design is fully balanced, and the unbalanced outputs have usually half of the output voltage ot the balanced ones.
philpot1001 said:
just out of interest, can the Ab-integrated amp be bi amped with the power unit, or is the power unit only intended for use with the pre-amp?
I can see an RCA output on the integrated but its not clear if thats just a standard RCA or if its possible to use it to connect to the power amp.