HELVIA ZEUS 404X, Руководство пользователя, Страница: 10 / 40

ZEUS X Series
4-CH Power Amplifiers with Crossover
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It is suggested not to obstruct them.
5. Operation Mode Selectors
These are three-position switches that allows you the selection of BRIDGE, STE -
REO or PARALLEL operation modes for the two amplifier sections (CH1 / CH2 -
CH3 / CH4).
6. Link Switch CH3/CH1
By putting this switch in the ON position, you can configure the amplifier with 1
input and 4 outputs in PARALLEL MODE and with 1 input and 2 outputs in BRIDGE
MODE. In both cases CH1 must be the input signal. The volume adjustment for
the outputs will be made via CH1 and CH3 level controls.
7. Ground/Lift Switch
The ground/lift switch eliminates unwanted hum and buzz by interrupting the
ground loops between equipment, preventing current flow along the cable shield
between two devices.
8. Gain Sensitivity Selector
This 3-position switch allows you to select the sensitivity of the input signal so that
you always have an adequate margin (Headroom) between the nominal level of a
signal and the maximum level that the amplifier can handle correctly before satu -
ration occurs with consequent signal reduction. This selector allows to choose, as
the input sensitivity, 0,775V, 1,4V or 2,5V.
9. Limiter Switches
These switches are used to activate (ON - Green LED ON) or disable (OFF- Red
LED ON) the protection of the input compression circuit. This protection function
is used to reduce the possibility that one or both of the channels (CH1 / CH2 -
CH3 / CH4) are clipping or overloaded and therefore to avoid damage to the
power amplifier in case of malfunction of the input device (Mixer, CD Player, etc.).
10. Filter And Frequency Sections
These sections are provided by a three-positions switch, three LED and a knob in
order to select the filter type and cutoff frequency corresponding to each channel.
When the switch is in OFF position (Green LED ON), it means that not any filter is