HHB Circle 5A, Руководство по обслуживанию

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Version 1d: 01.99
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Photograph of the amp module viewed from the inside
Tweeter level (HF level) reduction
Under normal operation, the two presets, one
for HF level and the other for bass level
should not be adjusted as these are individu-
ally set at the factory. It is not possible to
change these drive levels unless audio signal
analysis equipment is available.
As despatched, the tweeter control is normal-
ly fully clockwise (viewed from the perspec-
tive as shown above).
Imagining that one of the arms of the preset’s
X is pointing to 5 c’clock (fully clockwise).
Turning this arm anticlockwise until it points
to 1 o’clock (i.e nearly half way anti clock-
wise) reduces the tweeter level by 1dB; turn-
ing the arm until it points to 12 o’clock
reduces the tweeter by 1.5dB and turning
fully anticlockwise reduces the tweeter level
by approx. 2.5dB, a very noticeable reduction
across the tweeter’s operating range.
Be sure to return the preset adjuster to the
original level or to make a note on the outside
of the module that the Circle 5a is no longer
standard.
DO NOT ADJUST THE BASS LEVEL
ADJUSTER as this is individually calibrated,
and as shipped will be set and sealed to a
unique position.