Sirius XM is running a promotion during which you can get a
FREE receiver with a home kit to hook to your Russound or other home audio component. (Of course you do need to add a subscription to the service.)
I was going to add the Russound ST2-XM tuner but this option is FREE!
The offer is available to both new and existing customers. Check out the details here
https://shop.siriusxm.com/radios/?intcmp=SHOP-HP-PROMO1.
I added the Onyx EZ receiver (shown below) to my Russound CAV 6.6 and it's great. You can also control the Onyx EZ using an IR Blaster from the Russound unit and have complete control from Indigo. (Note that you do need to "teach" the Russound the remote control codes from the Onyx EZ remote.)
If anyone would like further details just let me know and I'll post them.