I decided to try to play a DVD on the computer and play the soundtrack through hi-fi No.2 via the headphone jack socket - well, I thought, the headphones work jes' fine, so this'll work. But no - well. yes, sort of. I can get the sound, but I also get a continuous crackling, sounding like the type of thing that unsuppressed electrical tools produced on your radio set in days of yore. Same result with both EAR 834 and Quad 44, regardless of which input I use. So, what's my problem, and can it be fixed?