View Full Version : loading vintage MM with 100K ohm resistance
Wakefield Turntables
29-05-2024, 19:31
Can someone please explain to me why this seems a good idea when loading vintage MM's? I've seen several threads recommending this with claims that the cartridge "comes alive"? I'm sceptical but I would like other forum members explanations, comments on the subject. Many thanks guys.
I think it depends on the cartridge and the resistance of its coils.
It is usually assumed that the cartridge should be loaded with between 5 to 10x the coil resistance. This implies a transfer loss of 0.8dB to 0.4dB respectively.
If however you load the cartridge with a lower impedance, not only will the transfer loss be high, it will be heavily damped. This is perhaps why some suggest using a cartridge load of 100 kOhm.
Interestingly the Quad 33 preamp used a 68 kOhm load, and Shure themselves suggest a maximum load of no more than 70k.
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