David, You want guesses? I got guesses.
First
"Within" seems to me like typical translated Japanese, for who the hell knows what. ;)
Second
Whether the transformer is physically inside or outside a preamp is obviously irrelevant. If it's between the cartridge and the first gain stage then the cartridge is driving a current-sensitive transformer rather than a voltage-sensitive gain stage. I gather the basic idea is to optimize the output of the cartridge for whatever it's driving. That does not necessarily mean you should use the same load as outboard tranny users of course. That would only be true if the turns ratio of our trannies was the same and the load presented by the following gain stage was the same. The fact that your tranny is internally wired might also be a factor, since the wire is likely to have different impedance than an external cable.
Third
Since most outboard 20dB tranny users seem to prefer a load around 40 ohms with either the 501 or 901, I'm guessing the EIFL "specification" of 20 ohms isn't simply referring to the load seen by the cartridge. I don't know of anyone who likes that low a load. The operative word in the above was, "guessing".
Interesting that some of your records sound more "dynamic" with a much higher load. By changing loads we can affect changes in the dynamics of different frequencies, but never in overall dynamics. If I raise the load on my 901 from our normal 38 ohms to 42 my HFs start to get too dynamic and the LFs begin to lose weight. Dropping the load to 35 or below has the opposite effect. I'll admit I've never tried 300.
"My guess is that if you load at 100 ohm you will be thrilled in most all circumstances. Whether small changes will result in big improvements probably depends upon your ear and your equipment." Since Peter_s is not running through any kind of tranny, I agree!
First
"Within" seems to me like typical translated Japanese, for who the hell knows what. ;)
Second
Whether the transformer is physically inside or outside a preamp is obviously irrelevant. If it's between the cartridge and the first gain stage then the cartridge is driving a current-sensitive transformer rather than a voltage-sensitive gain stage. I gather the basic idea is to optimize the output of the cartridge for whatever it's driving. That does not necessarily mean you should use the same load as outboard tranny users of course. That would only be true if the turns ratio of our trannies was the same and the load presented by the following gain stage was the same. The fact that your tranny is internally wired might also be a factor, since the wire is likely to have different impedance than an external cable.
Third
Since most outboard 20dB tranny users seem to prefer a load around 40 ohms with either the 501 or 901, I'm guessing the EIFL "specification" of 20 ohms isn't simply referring to the load seen by the cartridge. I don't know of anyone who likes that low a load. The operative word in the above was, "guessing".
Interesting that some of your records sound more "dynamic" with a much higher load. By changing loads we can affect changes in the dynamics of different frequencies, but never in overall dynamics. If I raise the load on my 901 from our normal 38 ohms to 42 my HFs start to get too dynamic and the LFs begin to lose weight. Dropping the load to 35 or below has the opposite effect. I'll admit I've never tried 300.
"My guess is that if you load at 100 ohm you will be thrilled in most all circumstances. Whether small changes will result in big improvements probably depends upon your ear and your equipment." Since Peter_s is not running through any kind of tranny, I agree!