First, I also agree with Doug, Larry & others that a correct load is very much system dependent in which listening room is also a main factor. Though in theory for a cart with 25-ohm "actual" internal impedance(sometimes 25 ohms is just a nominal value +/- a few %), 200 to 300 ohms resistor loading seems a reasonable point to start with. With 0.8mV output, an SUT(with 25-35 ohms transformer loading?)/head amp may not be as neccessary as LOMC.
Second, if another Benz Ace M user says he found 300 ohms is the best, you have to see his system whether it is similar or totally different from yours. There would be a large sonic deviation between the one uses 1000w solid state mono blocks for his giant multi-ways floor standing and the other uses 8-15w tube amp for a Fortex 8" full-range speakers.
Third, different cart manufacturers seem to have different approaches for their productions. So it is always better to have several impedance resistor loadings, in your case, say, 200, 400, 600, 800, 1000, 47k ohms, etc.
Dan
Second, if another Benz Ace M user says he found 300 ohms is the best, you have to see his system whether it is similar or totally different from yours. There would be a large sonic deviation between the one uses 1000w solid state mono blocks for his giant multi-ways floor standing and the other uses 8-15w tube amp for a Fortex 8" full-range speakers.
Third, different cart manufacturers seem to have different approaches for their productions. So it is always better to have several impedance resistor loadings, in your case, say, 200, 400, 600, 800, 1000, 47k ohms, etc.
Dan