Hi all, I have the Zen 84C+ connected to ERR (8ohms), via Styx cables.  Just bought a pair of Tekton OB4.5's (4ohms), with a matched pair of Tekton 8" Subwoofers with a single amp in one base wired to the other.

I also have the CSP2+ with an RCA for Sub.

Do I connect the subs into the CSP2+?

And how can I connect the OB4.5's (4ohm) to the Zen at the same time as the ERR's (8ohm)?  

If I want to hear one set of speakers without the other, do I need to disconnect at the amp all the time?  Or is there a speaker switching box you recommend?

Thanks in advance!

Cheers, Z