Integrating sub with KAV-300i

I'm thinking of replacing my Counterpoint amp and pre-amp with a Krell KAV-300i. I have a Velodyne ULD-15II and would like a little info on how it would hook up to the Krell. Presently, pre-out goes to the Velodyne amp and then from the Velodyne out to the amplifier. How does this work on an integrated amp?
If the Krell has a pre-out, main in jumper (most do), it can be hooked up the same way. Alternatively, if the Velo has high level inputs, it can be driven from the speaker outs of the Krell and then looped back to your mains.