I have a Koetsu which is highly sensitive to setup. Suggest you check:
(1) VTA: try the cartridge tail down
(2) Azimuth: turn it a fraction of a degree and observe increase or decrease in distortion
(3) torque of mounting screws (I'm not kidding) with a torque screwdriver; uneven torque is worse than the wrong torque.
Good luck!
(1) VTA: try the cartridge tail down
(2) Azimuth: turn it a fraction of a degree and observe increase or decrease in distortion
(3) torque of mounting screws (I'm not kidding) with a torque screwdriver; uneven torque is worse than the wrong torque.
Good luck!