Not the answer you were hoping for probably, but some necks just do that. Is it hissing only for octave A or does it continue when you player higher and higher notes. When I have encountered it, it is specific to A2 which mostly has to do with the pip being located at just the right node. Do a search on pip placement to read up on other commentary.
I have noticed that the hissing can be lessened if the pad does not raise as far off the pip. Others may know of different remedies. I have heard of some, but won't repeat them here because I've not tried them myself.
I have noticed that the hissing can be lessened if the pad does not raise as far off the pip. Others may know of different remedies. I have heard of some, but won't repeat them here because I've not tried them myself.
