[pongiverse]

rca input, hum is present with my dac connected or not. hum is also present through both balanced and se outputs

Do you have all of them connect at the same time? You can only use one input at a time.

 

[cerebralwaves]

Do you have all of them connect at the same time? You can only use one input at a time.

No, just one dac connected to rca input. And I test headphones one at a time.

Is there any audible hum in your unit?

 

[pongiverse]

No, just one dac connected to rca input. And I test headphones one at a time.

Is there any audible hum in your unit?

Had hum when connected to RCA, but was able to fix it by flipping the AC plug

 

[cerebralwaves]

Had hum when connected to RCA, but was able to fix it by flipping the AC plug

hmmm okay glad you got yours figured out! I may try to take mine back again then, if you're able to get it to no audible hum.

 

[drroman66]

When I purchased

Do you have all of them connect at the same time? You can only use one input at a time.

When I purchased my unit from a local dealer, I also had this same problem. I took my unit back to my dealer and replicated what I was hearing for them. They ordered new tubes for me which resolved my problem.