No mention is made of program. Ears clamp with very loud levels.
Inner radii are less dynamic due to lower velocity. Is there a resonance at the outer edge that disappears toward the spindle?
Speaker and amplifiers change with temperature. How old is the MC402? Was it left on all the time and in need of a recap? Does it need a bias adjust? See http://ielogical.com/Audio/WinterBlues.php
Cartridge alignment would be the last place I'd look given the O/P's question.
Inner radii are less dynamic due to lower velocity. Is there a resonance at the outer edge that disappears toward the spindle?
Speaker and amplifiers change with temperature. How old is the MC402? Was it left on all the time and in need of a recap? Does it need a bias adjust? See http://ielogical.com/Audio/WinterBlues.php
Cartridge alignment would be the last place I'd look given the O/P's question.