I just set up my BHK 300s, and they seemed to work properly at first. Then all of a sudden sound cut out on one of them. The front panel light on the front is steady blue. The tube heaters appear to be on, the LED in the tube bay is on (red). However no sound is coming out. At one point the sound came back for a few brief moments and then cut back out.
The setup was Bridge II > Direct Stream DAC > BHK 300 > KEF Blade II for cabling I use Straight Wire Expressivo Balanced, and Expressivo Grande Speaker Wire
I swapped out the BHK 300s and both channels worked fine.
Any insight would be helpful as I have not seen any faults codes or anything. May have heard some relay clicks, but not really sure.