I have a TX-NR807 . I have only used this amp for a couple of hours (It has been in a box since new, 2 years). My main speakers are Soundlab electrostatics. The Onkyo does not drive these very innefficient speakers well. I am thinking of installing a Emotiva XPA-2 amp too drive these speakers using the pre outs of the Onkyo.Has anyone used this or similar? I would use the 12v trigger to start the Emotiva. Also can I then use the Onkyo mains to drive a different zone? Any ideas would be appreciated. Thanks Barry