They should to sound warm and romantic ("tubelike"). In case of my SPU 85 Anniversary I find the sound is not overly warm or romantic. It is rather neutral with great speed and bass. Tracking is not so good though... I wonder though why there are so many admirers of the Ortofon SPU line. The cartridges are heavy and tracking ability is poor (despite of the high VTF of >3.5-4.0!), so why do those people choose for the SPU?
Chris
Chris