No knob required. Just check it doesn't fall over and stays on the shelf. If so, you have a balanced amp. If not, chances are it lacks weight throughout the frequency range. You could try turning it up. or upside down.
My friend is deaf in one ear, 25 and says he can't pass the driving test because they only have stereo headphones. I didn't know they had an audio part of the test now.
Read these "rules" AND introduce
yourself before your first post
Being true to what the artists intended
(opinion / entertainment piece)
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