I'm curious if anyone has experienced similar issue, and if you have any troubleshooting help- otherwise it may come down to a warranty issue.
I'm currently running a BDA-3 DAC > Audio Research SP14 > Bryston 4B3 > B&W 804 d3.
Within the last week there is a high pitched buzz coming from the mid/tweeter of the speakers when I turn on the amp- I can hear it from about a foot away. When amp was new it was dead quiet. I of course went through the normal steps, unhooking everything, balanced vs se, plugging amp into power conditioner instead of directly to wall (I always run it directly to wall circuit), moving to different location (office), unplugging every other componenet connected to that circuit and all have the same buzz coming from the amp--even with no input cables plugged in.
What I'm worried about is a potential issue with the BDA-3 that may have caused it. I recently started using the HDMI input from an Apple TV to stream music and watch movies through, and whenever the HDMI would lose signal, switch signal, or the apple tv would turn off, there would be a Thump in the speakers (I figure it is a flaw in the BDA-3, as it happens across HDMI sources blu-ray, xbox, Apple tv, but does not happen on any other inputs if signal is lost or changed). This went on for a week or so while my wife was at home listening to music and watching shows, etc. I finally just plugged the HDMI source directly to the TV and used the Optical out from the TV with no thump issues. Needless to say I won't be using the HDMI input or outputs anymore on the BDA-3.
What do you guys think. Has my BDA-3 gone bad? Did it mess up my 4B3? I seriously love the sound these bryston units make, but this is certainly frustrating! I'll hit up Bryston directly but I would like to see if anyone else has similar issues or potential solutions. Thank you