Here's a picture of the XM Commander from the Crutchfield site. Notice the RCA output jacks.
http://www.crutchfield.com/cgi-bin/S-npmQBPT3HGO/ProdView.asp?s=0&cc=01&g=79800&id=morephotos&pi=4& i=209XMCMNDR&display=XL#morephotos
Klaus
"God made some men big and some men small, but Sam Colt made them all equal."