This morning while arriving at ISS1 site to check on the systems, RASS was running but I automatically noticed that it did not sound "normal." I walked around the enclosure to get a better listen to the speakers and I feel that I heard at least 2 of them have a crunchy static noise. The speakers I thought I heard doing this (if going clockwise starting at the surround closest to the gate) was the 2nd and 4th speakers. At around 0910 I turned off the system and set the software config to only run RASS. I then unplugged all but one speaker to start troubleshooting this sound. The speaker I started with was #2. When I turned it on it sounded pretty normal, even though I thought this was possibly a bad one. Next I tried speaker #3. It seemed that I was hearing a noise caused by vibration. I did notice the speaker was moving around a bit when messing with the plug and that a nut had come off of one of the rods, and I had placed the bucket on the ground next to the surround. I tightened up everything and moved the bucket away, and the noise I was hearing seemed to not be noticeable anymore. When I went to try the speaker #4 instantly I heard the crunchy static noise and it went on for a little while but then seemed to fade. I had planned to change this speaker, after checking the last one. Speaker #1 did the same but the static cleared pretty quick. I restarted the software and then the static did not come back. I retested speaker #3 to see if the speaker was for sure bad and the static was not there. This static seems to be intermittent, or maybe went away after re-seating all the plugs. I decided to plug in all the speakers and take another listen and it sounded normal again and no static was present. I held off on replacing any speakers since this is intermittent at the moment. Either re-seating the plugs helped or it is a little colder this morning, and possibly that could be affecting the speakers? If we do end up having two bad speakers we do have two spares in the trailer. I will keep monitoring the speakers a little more closely due to this.
Bill let me know if you are seeing anything in the data that would constitute changing any speakers sooner.