I bought a BHA-1 in February 2017 – it was a low s/n demo model. I was happy with the sound, but I soon noticed a crackling when adjusting volume.
So two weeks ago I sent it into Bryston to have the pot checked out (and LED colour changed since it was there anyway). It was not until they sent it back to me that I found out they could hear nothing wrong with it which is worrisome to me because there was a very audible crackling.
I was prepared to let it rest since Mike assured me that they gave it a cleaning and the crackling was gone, but now there is a constant buzzing in my headphones especially in high gain. I have it in the low gain setting, but the buzz is still audible. I don't recall a buzzing before I sent it to them.
To make matters stranger the buzzing disappears when I increase the volume knob to about 11 o'clock. All of this is of course with no music playing.
Perhaps I simply did not notice the buzzing before, but I'm sure things were dead silent – is it common to have a buzzing? The buzzing doesn't increase in volume when I adjust the knob except as I said it disappears at about 11 o'clock and increases when I put the volume to zero.
This is all rather disappointing but somewhat moot since I'd rather not send it off again.
