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Optimum MM cartridge loading

I see that most phono preamps do not have an adjustment for 100K load, which is what some MM cartridges like (such as the Grace F9). I only see 47K on the phono preamps I have looked at. Also being able to set the capacitance would be helpful, at either 100 or 150pF. Are there any "affordable" phono preamps that have these adjustments built-in? If not, how can I go about adding the desired loading and capacitance to an existing phono preamp? My Musical Fidelity X-LPSv3 has neither of these adjustments on it. I am open to replacing it with a unit that provides adjustments.
tube540

Showing 2 responses by lewm

lewm
13,406 posts
 
I think the most cost-effective solution is the K&K audio TOTL phono stage, balanced version. For a bit extra you can have it with adjustable loading, and in my opinion, balanced phono is an advantage as well, for around $3K or less, in factory-assembled form, I think. Talk to Kevin Carter about your needs, and he can make it happen. (No affiliation.)

Further, if there's sufficient room on and in the chassis, it's no big deal to install adjustable loading for R and C yourself. The trade-off is said to be in terms of noise; the switch required for adjustment is going to introduce a very tiny amount of noise. I don't hear it even on my very high gain MC phono stage, so it really should not be a problem at the lower gain levels needed for MM.
lewm
13,406 posts
 
Good to know about the upcoming Liberty phono stage. And Raul points out the EAR 324, which I have also never heard, but it has a good reputation. (Because of its very flexible loading, I have long been curious about it.) Then there is the K&K Audio one I mentioned. Any of these three can be had for half or less than half of $6000, and is an excellent choice. (I think you'd have to buy the EAR 324 on the used market to get within $3K.)
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