The KSG-4500 needs the KPG-21D along with KPT-50 programmer (could use the KPT-20 if you can find 1). The KPT-50 has 2 cables, 1 plugs into the mic jack and the other 1 plugs into a connector the inside of the unit (KPT-50 can program the EEPROM on its own, but this requires you to remove the prom, more work). If you open the front lid of the unit and mounted to the back of the lid by the speaker is the board you want to plug the other cable into (look at the pic attached). All the KSG-4500 is, is a TKB\R-720\820 with a 100W PA and LTR capable.
Last edited by Luis_R; 09-26-2010 at 10:48 AM..