Importance of impedance matching cartridge with phono stage?

Why i suggested you search the archives.
The original suggestion that cartridges with output below 0.4 would work with 100 ohm load was probably based on the assumption that such cartridges typically have an internal resistance at or below about 10 ohms.  You want a ratio of about 1:10 or >10 between those two values. However there are exceptions. Denon for example; their DL103 has a high internal resistance yet low output and would not be well suited to your Gryphon. And finally you need to know that your phono section has sufficient gain for these low output MCs. Don’t buy a high output MC for this setup.

Okay, thanks All.  I think that answers the question sufficiently and the 10:1 or greater ratio makes sense.

Hi Nyev! I’ve been trying to find out how the phono module is installed. I picked up the newer version (used) for my Diablo and the former owner has been very helpful, but knowing that you installed your own I was hoping that you could help me out. Thanks!!!
Kevin O’Driscoll 

Dear  @kevinodriscoll : I think that the best for you is to contact directly to Gryphon:

https://gryphon-audio.dk/contact/


Regards and enjoy the MUSIC NOT DISTORTIONS,
R.

Hi Kevin,
My dealer gave me a piece of paper with the instructions on it when I bought the Diablo.  Unfortunately I can't seem to find it, otherwise I'd take a picture and post it.
Suggest you ask a dealer.  Even if you didn't buy it from a store I'm sure you can find one that will send you the instructions.

The install process was simple but I neglected to set the jumpers correctly on the Diablo main board and there was some popping noise on the phono channel.  Was a simple oversight on my part.  When I corrected the jumpers the problem was fixed. 

If you have the DAC module installed, you will need to remove that first to install the phono module, and then reinstall the DAC.  So if you have the DAC, you will need the instructions for installing that too.  Again it's very simple, but with the DAC getting the angle right to maneuver it in is just slightly tricky, but it's nothing too bad.
Since my dealer was encouraging me to do the install myself, and I felt that I was capable of doing it, I did get my dealer to state, in writing, that they would honor my warranty if I caused damage to the Diablo or modules during the install.  They had no problem doing that and other than that one issue with the jumpers it went smoothly.