Hello, Generally speaking I have had no surprising level changes. If, however, I plug heaphone or another source into the phones jack, the level will drop, and the measuring scale is different from that which we have with the speakers. Could this be the reason? Joe G. On Thu, 24 Apr 2008 12:52:02 -0400, Schlank, Alan wrote: >Hi, >Why is it that when changing the volume I sometimes hear levels in the >teens and other times up around the fifties? It seems to me that the >volume readings should be consistent across applications. >Alan >Alan Schlank >508 Test Engineer >508 Engineering Division >Office of Enterprise Development >Alan.schlank@xxxxxx >phone: 202-461-5200 >http://www.va.gov/accessible/