Batboard

I have set up 6 XPR5350 mobile radios for a recording system at one of our local airports. Basically i have 1 mobile for every channel that will be recorded. I have used pin 9 and 10 which is the spker+ and spker- to be hooked to the recording system. My question is the system works but the volume has to be up about half way for it to record. Is there anyway i can mute the front speaker so the audio does not come blasting out of the mobile? Or should i be using pin 14 which is rx audio and ground would hat make a difference? I am just trying to mute the audio coming from the front of the mobile with the audio only going through the back to the recording equipment......

Thanks

John

Pin 14 is the only answer for this. Volume can be turned off on the radio and you'll have nice, clear, crisp filtered audio.