Madfloyd. I upgraded to the Signature arm and never looked back. It was a very good upgrade which I would recommend. My room is an untreated living Room. If I have any problem with it, it would be its slight tendency towards brightness on some albums. I have noticed no undue brightness with the Sig arm. Tighter bass and more detail is what I heard. There is no more tendency towards brightness with the Sig arm than the standard arm. I have used a Dyna 20XL and a Benz Ebony L with great success.
As someone else has said, your problem is not the arm/cart match. I suspect a bad cartridge.
As someone else has said, your problem is not the arm/cart match. I suspect a bad cartridge.