Bill, that looks to me like an excellent suggestion. You appear to be referring to the "KAB PreconLP Inverse RIAA Level Converter." It appears to be a purely passive device, using resistors and capacitors to divide down the signal level and also provide inverse RIAA equalization.
The only slight caveat I see is that when inputting to the preamp's LOMC inputs I would make sure that loading is set to 100 ohms, as opposed to a value that is much higher (e.g., thousands of ohms). Apparently the device relies on that loading, in conjunction with its own output impedance, to divide down what would otherwise be MM levels to LOMC levels.
In this case, though, even that concern is pretty much eliminated by the fact that the highest value load setting that is provided on the preamp for the LOMC inputs appears to be 470 ohms. That value would still reduce what would otherwise be MM levels by a substantial amount, probably something like 10 db (about a factor of 3 in voltage) according to my calculations.
Best regards,
-- Al
The only slight caveat I see is that when inputting to the preamp's LOMC inputs I would make sure that loading is set to 100 ohms, as opposed to a value that is much higher (e.g., thousands of ohms). Apparently the device relies on that loading, in conjunction with its own output impedance, to divide down what would otherwise be MM levels to LOMC levels.
In this case, though, even that concern is pretty much eliminated by the fact that the highest value load setting that is provided on the preamp for the LOMC inputs appears to be 470 ohms. That value would still reduce what would otherwise be MM levels by a substantial amount, probably something like 10 db (about a factor of 3 in voltage) according to my calculations.
Best regards,
-- Al