I recently bought a BHK 250 amp and I am having a mysterious noise issue that so far I haven’t been able to get a handle on.
- With no inputs connected some amount of hiss is audible with the both channels of the 250
- If I connect my Directstream DAC, BHK Preamp, or both, noise doubles
- With the DS and BHK Pre in series the preamp volume will amplify the noise coming from the DS (presumably it originates at the beginning of the chain, even when no inputs are connected to the DS or BHK Pre)
- If I connect the DS, BHK Pre, or both, and turn one off or put the Pre in Standby, all noise goes away (it becomes quieter than BHK 250 with no inputs).
This issue did not exist with my previous amp in the same chain, with the same cables, etc.
I’m using balanced cables, Audioquest Colorado XLR, and Shunyata Alpha NR power chords that are connected either to a Shunyata PS8 or a PS Audio P15.
If anybody has some insights, the would surely help. Thanks.