XM radio question..

[AtifSajid]

If I buy the home reciever and want to connect to say 4 more external speakers, what else do I need?

[quickdodge®]

All you need is Sirius Satellite..
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Lolol, j/k, but siriously....lolol, j/k, again. If you have AUX ports on the home reciever, or a place for ext. speakers, all you need is the extra speakers, IIRC. Later, QD.