This
feature reports the amount of signal the cartridge will provide to
succeed the pre-amp. The tension varies with the speed, so it is
accustomed to refer it at a certain speed, being common the value of
3.54 cm/sec.
In
general the minimum value for current high-fidelity equipment that must
provide a needle is 3 millivolts; Under that tension it is necessary to
use a preamplifier or transformer to adjust the appropriate level of
input to the preamplifier stage.
Between
the limits of 3 and 7 millivolts the output is acceptable, being the
differences of that tension the cause that in the same preamp it is
necessary to modify the control of gain (volume) according to the type
of cartridge that used in order to obtain the same acoustic level.
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