I just got an amp Arcam 8R without manual and I was wondering if I can use it with 3 amps Marantz MA-500 to get a 5 ch setup. The other question is if I can use the Arcam 8R just as a preamplifier to drive 2 amps MA-500 in a two channel stereo setup. Since I do not have the manual for the 8R any other info regarding the above questions would be very much appreciated. Thanks in advance for your help. Raul.