12
… owners of high-effectivity headphones will rarely set the volume
control higher than 9 o'clock in order to exclude hearing damage, while
... the maximum setting may still be too soft for low-efficiency
headphones, but
… all users expect highest quality at lowest noise and distortion.
Thus, the
circuitry
must adapt itself as the headphone won't !
WE CALL THE SOLUTION TO THIS PROBLEM
PRE-GAIN
The alignment between amplifier and headphone is provided by the
preamp stage, which can boost or attenuate the input signal in four
steps of 6dB each. For this purpose, two switching devices are located
on the rear panel for left and right channel individually.
CAUTION !!
The switch settings should be altered under the following conditions
only:
-
The unit must be switched OFF
-
the "VOLUME" control must be set to minimum
-
left and right channel should ALWAYS be set the same
-
never increase the setting by more than ONE step per
channel at a time.
Summary of Contents for HPA V90
Page 1: ...1 HEADPHONE AMPLIFIER HPA V90 USER s MANUAL ...
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