You cartridge needs alignment, you need to adjust the Azimuth, the cantilevers perpendicular relationship to the record groove. Put a small mirror under the stylus tip and look for a perfectly straight line through the cantilever and its reflection. If there's a bend in the reflection at the mirror, the azimuth is wrong. Some tonearms are designed to allow ease of azimuth adjustment; those that aren't require you to insert tiny shims between headshell and cartridge.Azimuth alignment is vital to correct left-right channel balance, and consequently to soundstaging and imaging. Azimuth can als be checked with a dual-trace oscilloscope and a test record. With each channel feeding one inpute of the 'scope, play the test record with a pure tone.Perfect azimuth alignment will produce identical amplitudes from both 'scope channels. If any of this in not understood, save yourself a problem and take the complete turntable arm and cartridge to your local high end shop and ask for their help. Good Luck, Rob