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Advice on MM/MC phono pre-amp please.

I have a Rega Planar 25 with a Dynavector 20X-H high output moving coil cartridge. I just bought an Accuphase Integrated amp with switchable MM/MC Phono. The Rega plays through either one, however it is much louder through the MC.
The Manual for the Accuphase says that the input impedance is 47 kilohms when switched to MM. It is 100 ohms when switched to MC.
The Manual for the Dynavector says recommended load is 47 Kohms / 30 Ohms.
Obviously the MM stage is the perfect match at 47 ohms.
My question is can the MC be used with this cartridge, and what damage (if any) can occur as a result?
Sorry for the long post.
Thanks in Advance.
muzikat

Showing 1 response by eldartford

eldartford
4,262 posts
 
Improper (not as designed) loading of the pickup will probably affect its sonic qualities (eg: frequency response) as well as volume. There is no risk of damage.

I have not seen the schematic of the Accuphase amplifier, but I don't think you can always assume that the MC input involves an extra stage of electronics. I have a Tandberg 3008A preamp with MC and MM inputs. It has two completely separate phono preamp stages, with identical circuit topography but different component values as necessary to yield high and low gain performance as appropriate.
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