the only problem with that is you need permission from the radio station.. has to do with the rebroadcast lic required to tranmit lic material.. years ago some law student down in Dallas sued (class action) 12 major corps for that and won.. since that very few companies ignore the fcc on that one.. that is why on hold music sounds so great.. canned torture as best.. one step below elevetors..
but any music source with a headset jack will work, impendence matching transformer, the box is between 2 and 8 ohms out, a trunk card is 600 ohms
john poole
bellsouth business
columbia,sc