Recently (last several wks) have noted that the usual setting of 28-30 volume level is not providing sound loud enough...Specific examples were with channel 18 (FOX) during NASCAR racing programs. It was also inconsistent during this evening's Dancing with the Stars...TV program on channel 8 (ABC).
So....during shows, we have to run (increase) the volume setting to up near 45+ at times to hear proper volume..and then intermittently the volume will return proper at approx. 30 setting.