Thanks. I'm going back and forth between 10 and 30 ohms to hear the difference in just those two now. BTW, what about cable impedance? Do I just measure it with an ohmmeter and it adds in series with the cartridge impedance? I'm thinking I will need at least 30 ohms when you take a cable into account, though it may be even more. If I remember correctly, the cables connected to my cartridge via a Wheaton Triplanar tonearm are Cardas phono cables.