Thanks Steve, I’m happy to help. I hope it works for your FT 450d. Yes you may share the interface with others. Frankly, I’m somewhat surprised That MFJ hadn’t come up with it by now. I’m using my ft4

#audio

Also, adjust the FT450 menu mic settings. MIC GAIN= LOW ... MIC GAIN NOR sounds Hotter with audio processing included..... MIC GAIN HIGH is to hot do not use. and MIC EQ= #4 This setting depends on in

Direct connection from RSS TX Out audio to the FT450D front panel RJ45 microphone jack would cause distorted audio overload when the PTT closed to TX. making it unusable. I bought the MFJ 5706MD cable

#audio