The cartridge may be riding too high in the rear (VTA).
If so, you then would lower the tonearm height.
An easy test for this (if you don't have a thicker mat) is to place an an LP under the one you are playing, which effectively lowers the rear of the cartridge when playing the record.
Probably best to check/reset the tracking force if you have a scale.
Adjusting the arm height on my old SME arm is a PITA so I use a second "shim" mat for super thin LP's (which are typically 70's imports from Europe).
Not a big deal as they are but a very small percentage of my LP library.
DeKay
If so, you then would lower the tonearm height.
An easy test for this (if you don't have a thicker mat) is to place an an LP under the one you are playing, which effectively lowers the rear of the cartridge when playing the record.
Probably best to check/reset the tracking force if you have a scale.
Adjusting the arm height on my old SME arm is a PITA so I use a second "shim" mat for super thin LP's (which are typically 70's imports from Europe).
Not a big deal as they are but a very small percentage of my LP library.
DeKay