Hi Dave,
Excellent. That's a fairly sharp filter, but it never entirely eliminates the problem, plus the filter may also sharply attenuate low bass below 30 Hz (pipe organ, bass drum, etc) if your speakers are capable of response in that region. Although, except for special "audiophile" LPs that were half-speed mastered, not many vinyl discs contained musical content of import below 30 Hz. It was too difficult to cut and limited playback time of the LP because the groove excursions were so large. Besides, cheap phono cartridges couldn't track such grooves without major distortion.
Regards,
