Ideas for Biamp with mc611 and mc275?

So I have been thinking about biamping with two MC601s and one MC275. My pre is the c2300 that has two outputs and my speakers are set up for biwiring. 
 

Would this work or would I need two Mc275? How do I control the gain differences?  The c2300 allows adjustments of gain for each input but I’m not sure it does for each output. 

@stephens770 so would something like this work as resister to match the gain on both amps?

https://www.sescom.com/products/view/product/productslug/sescom-ses-mkp-39-dual-channel-volume-control-with-dual-xlr-io