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Cartridge Impedance

I just bought a phono pre-amp that allows me to adjust the impedance of a MC cartridge. I was using 100ohms. Now I want to experiment.
Could someone tell me the effect the trebles will have if I lower or raise the suggested impedance. For example, If I raise the impedance will the highs be more prominent or less prominent? 
Thank you.
128x128jmh128
terry9
2,211 posts
 
More prominent.
benjie
326 posts
 
A higher ohm setting will increase the treble and decrease the bass, a lower ohm setting will decrease the treble and increase the bass. There is no correct setting it's a matter of personal taste.
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kingbarbuda
513 posts
 
I don’t have a MC cartridge. But I do have an Ortofon 2M Black. I also have a phono Preamp that allows for changing the capacitance. Ortofon recommends a capacitance of 150-300pF. I asked Ortofon, given the above range, what is the best capacitance setting to choose and why? Here is the answer I received:
”For MM cartridges, the capacitance of the input of the amplifier should more or less match the value of the MM cartridge. The higher the capacitive value of the input of the phono stage, the duller the sound will be. The lower the capacitance of the phono input, the brighter the sound gets. A mismatch results either in dark dull sound or an overbright, distorted signal. The capacitance of the phono cable should be taken into account when matching a MM cartridge to the phono stage as the capacitance of the cable adds to the capacitance of the phono input.”
terry9
2,211 posts
 
I suspect that the OP is talking about resistance.
jmh128's avatar
jmh128 OP
16 posts
 
I was talking about adjusting the impedance setting on my phono pre-amp.
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