Cartridge output matching to phono stage.

it's a very simple arithmetics.
all you have to do is use the following formula to transfer gain from dB to times:

1. 20Log(times gain) = dB gain

2. times gain = 10^(dB gain/20)

"^" sign in the formula bellow represents power of an argument 10 in our case.

thus if your phonostage has a gain of 60dB than using second formula you should bring 10 to the power of three 10^3 = 1000 times i.e. 60dB = 1000 times.

You should always multiply the gain by your cartridge output and get an output voltage arround 500mV or higher.
A phonostage with 60dB gain can be used with the cartridges as low as 0.5mV on the output or higher. A phonostage with 40dB of gain(100times) can only be used with 5mV or higher etc...

I suggest to pick up phono that have at least 50dB of gain.

Sometimes it's enough(depending on the preamp sencitivity) to have the output of your phonostage 200mV or even bellow but that you will have to check on the preamp specification.
For low gain or zero gain or even passive preamps hold up to 500mV or higher.

Marakanetz, Thanks for the responce, but now I am confused. For example, I have a Conrad-Johnson PV10B tube phono stage at 48.5 dB of gain. The cartridge I wish to purchase is a Benz Glider at 0.8 mV. When I multiply gain by voltgage I get 38.8, well below 500mV. What am I doing wrong?

Regards,
Lou

You're getting some number approx 10^2*sqrt(10) which gives you approx 300 times and doing wrong nothing. So you're getting an approx output voltage of 240mV. Now you should check specs of your preamp in terms of input sencitivity which has to be bellow 240mV and moderate gain of 10...15dB. Otherwise I would pickup a high output version of the same cartridge for its maximum performance.

Happy Listening,
Mara.