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MM Phono Input impedance change 47k to 100k ohms

The well-written AudiogoNer Raul states that the Grace F9 Ruby MM cartridge is best matched with an input impedance of 100k ohms vs the standard 47k ohms. May be a dumb question, but is this a simple resistor swap that I might be able to handle or should I best take the preamp to a technician?
elunkenheimer

Showing 3 responses by mofimadness

mofimadness's avatar
mofimadness
5,622 posts
 
I agree with Al. I have sold, (I was a Grace dealer) and personally owned many various F9 cartridges and have found that in most cases, the 47K setting is perfect. I currently have several F9E's and have tried many different phono stages with them.

I have owned a couple different phono stages that allowed the 100k setting, but I always went back to 47K. IMHO, the 47K setting is just fine.

I've had a Grace F9E in my collection and system, non-stop for over 30 years now.
mofimadness's avatar
mofimadness
5,622 posts
 
I wish Almarg was around these days

+1...Miss that guy!
mofimadness's avatar
mofimadness
5,622 posts
 
@chakster...I just pulled out my dealer binder from Grace.  The literature for the F9E & F9E Ruby, state 47,000 as the recommend load.

The brochure that has the F9F/F9E/F9L/F9D/F9P all state a load of 30K-100K.

As I stated, I tried 100K a couple of times.  Liked it better at 47K.
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