Bypassing B&K AVR 507 Pre-amp.

I would like to move on to separates. As I can't afford to buy both amp and pre-amp at the same time, I would like to start with the pre-processor. My B&K 507 S2 receiver does not have pre-amp out or amp-in connections. If I were to start with a different pre-amp, could I use the 7.1 audio inputs on the 507 to input the signal from the pre-amp? Would the fact that these inputs do not have bass management be a problem?
Any info appreciated.
Rich