Speaker Switch Relay

[Yobleduwop]

Has anyone ever tried making a speaker switch out of relays, but not one that just does the speakers, im making a dc-30 so i was thinking of a small relay system that lets you select between:
Full power
Half power
Half power Phase inverted speaker1
half power phase inverted speaker2
full power phase inverted speaker1
full power phase inverted speaker2

I'm thinking of putting this system in with a 2 pole 6 pos switch so that you can switch with on side and have and led indicate on the other side,
Thanks Joel