My question is not about a BH amp, but I am posting here looking for some help. Pls bear with me, I m new to this forum and tube amps.
I recently got a Wooaudio WA2 amp, new from wooaudio, and i am using it with Beyer T1 and few other cans.
It does hum through the headphones when volume is at 11' clock and hum only becomes louder from there.
i did some testing to isolate the device in the chain that is causing this problem. I found that when nothing is connected to amp(except power), there is no hum.
However when i connect a DAC, there is hum thru headphones. Even with DAC turned off, there is hum(i tried output of Schiit Modi, Emotiva DC1, line out of Fiio X3ii - each of them powered off and not even connected to my laptop). RCA cables i am using are from Schiit and Emotiva, so i think they are good quality.
I tried different power cable, wall sockets, even took the amp to friend's apartment for testing, and the result has been same.
I have been using Schiit Magni, JDS O2, few speaker amps from Emotiva for more than a year - none of them have any hum issues.
I contacted Wooaudio and was told to upgrade cables, dac to resolve the hum problem. But I think the cables, dac are not the reason.
On other note, one of the 6080 tubes i received, i think is faulty. It gives out hiss on one of the cups on headphone, even at zero volume. When i switch 6080 tubes on the amp from left to right, hiss also switches on headphones
My question - What could be the reason for this dreaded hum? i'd appreciate any help in resolving this. This is my first tube amp, and i havn't been able to enjoy it due to all these problems.