Jameswei,
Don't know where you learnt your electronics but a phono cartridge is a PASSIVE device. It has nothing in it but a wound coil of wire & some magnets. It CANNOT put out any current whatsoever even if it tried to! All it can put out is a VOLTAGE. As already stated by Herman, the VOLTAGE put out by the cartridge is FIXED! Nothing under the Sun can make it increase (it can decrease as the cart. ages & the magnets decrease in their strength but this would happen over several yrs, maybe 10s of yrs).
If the volume is increasing by decreasing the resistance @ the phono pre, I suspect that the resistance (in the input stage of the phono pre) is part of an electronic ckt. that is sets the voltage gain of that ckt. Decreasing it could increase the gain of that ckt. Hence the volume increase. If I have wrongly assumed this & the resistance you are talking about is the resistance you add/take-away externally, then there should be NO change in volume i.e. It doesn't make any sense that the volume changes w/ change in ext. resistance.
Hope that this clarifies.
Buscis2: Cool! I accept you output voltage numbers of the Koetsu. I only GUESSED at the output level as I have no pesonal experience w/ this part. cartridge. I would suspect that 60dB total gain would be sufficient but if your experience shows 64dB is better, then, so be it. I suppose that achieving 325mVrms @ the phono pre is a "magic" number to get max. gain from the pre onwards (to the speakers)?? i.e. it is the max. input to the line-stage of the preamp?
Don't know where you learnt your electronics but a phono cartridge is a PASSIVE device. It has nothing in it but a wound coil of wire & some magnets. It CANNOT put out any current whatsoever even if it tried to! All it can put out is a VOLTAGE. As already stated by Herman, the VOLTAGE put out by the cartridge is FIXED! Nothing under the Sun can make it increase (it can decrease as the cart. ages & the magnets decrease in their strength but this would happen over several yrs, maybe 10s of yrs).
If the volume is increasing by decreasing the resistance @ the phono pre, I suspect that the resistance (in the input stage of the phono pre) is part of an electronic ckt. that is sets the voltage gain of that ckt. Decreasing it could increase the gain of that ckt. Hence the volume increase. If I have wrongly assumed this & the resistance you are talking about is the resistance you add/take-away externally, then there should be NO change in volume i.e. It doesn't make any sense that the volume changes w/ change in ext. resistance.
Hope that this clarifies.
Buscis2: Cool! I accept you output voltage numbers of the Koetsu. I only GUESSED at the output level as I have no pesonal experience w/ this part. cartridge. I would suspect that 60dB total gain would be sufficient but if your experience shows 64dB is better, then, so be it. I suppose that achieving 325mVrms @ the phono pre is a "magic" number to get max. gain from the pre onwards (to the speakers)?? i.e. it is the max. input to the line-stage of the preamp?