For Mr Harley -- can the Pass XA100.5 handle Maggy 20.1 alone ???

 Was readying your review of the Pass XA 100.5
Does this amplifier produce enough current to push the Magnepan 20.1s alone or would it be better to biamp with a X350 or x600 on bass and XA on high/mids ??
How do you think this sound compares to the Ayre MXRs monos ?? 
I was able to listen to 20.1s with Ayre KXR pre & C5xeMP front end while interchanging the MXRs with Audio Research Ref 210 monos and McIntosh 501s.
The Ayre & ARs where both tremendous. I preferred the Ayre but the AR definatley had more bass.
How might the Pass XA compare ??
 
Thanks