If part of your question is how to get proper loading/matching for these cartridges:
1.) The low output should be run with the pre-amp set to the MC position for the phono input.
2.) Most high output MC carts were designed to mimic standard MM carts in terms of output level and load requirements - so try that one with the pre-amps phono input set to MM.
Assuming that your high output MC is actually high output (MM signal levels) - you don't want to run it into a MC input because you'll probably electrically overload the phono input - this will sound really awful. Years ago i had a customer repeatedly bring in his table/arm/cart complaining about mistracking - which we could never reproduce on the service bench setup. Finally visited his home and noticed he was running into a MC input with a high output MC - he thought he was getting more power because he didn't have to turn his V/C up as much in the MC input - but on louder passages the distortion was truly awful because of overloading the input.Switched to MM input and all was well.
1.) The low output should be run with the pre-amp set to the MC position for the phono input.
2.) Most high output MC carts were designed to mimic standard MM carts in terms of output level and load requirements - so try that one with the pre-amps phono input set to MM.
Assuming that your high output MC is actually high output (MM signal levels) - you don't want to run it into a MC input because you'll probably electrically overload the phono input - this will sound really awful. Years ago i had a customer repeatedly bring in his table/arm/cart complaining about mistracking - which we could never reproduce on the service bench setup. Finally visited his home and noticed he was running into a MC input with a high output MC - he thought he was getting more power because he didn't have to turn his V/C up as much in the MC input - but on louder passages the distortion was truly awful because of overloading the input.Switched to MM input and all was well.