2nd receiver to power rear surround channels

Hello,


I have a Yammy rx v2400 receiver that is about 3 years old. I am thinking about purchasing the new Yammy 1800 or Onkyo 805 for the new audio codecs and HDMI. I was wondering if I can use the old 2400 to power my surrounds and rear surrounds (4 speakers) and use the new receiver to just power the front three channels I read that a setup like this is possible and the benefit is that more power would be dedicated to the seven channels, and I won't have to get rid of my yammy 2400. Any thoughts on this? If this is possible, do I use the pre outs on the new receiver and connect them to the analog ins on the old receiver? Will I be able to apply post processing from the new receiver to the rear channels? How about speaker distance calibration from the new receiver?