Hafler GX2800, Руководство пользователя

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PHASE
The Phase switch will select either 0° (normal polarity) or 180° (inverted polarity) for the corresponding output signal.
CD HORN EQUALIZATION
This adjustable high-frequency shelving circuit can be used to compensate for the roll-off of constant directivity (CD)
horns. At the +10dB setting, the gain increases with frequency to about +3dB at 3kHz, and finally to +12dB at 20kHz.
BIAMP/STEREO SWITCH
Turn amplifier off before operating this switch. This switch is located on the rear panel and selects either:
Stereo mode- 2 input signals and 2 output signals.
Biamp mode- 1 input signal and 2 output signals.
Biamp mode is useful if a mono signal needs to be distributed to speakers of differing impedance or power level. The load
switch for each channel can be selected for the appropriate load, and the level controls can be adjusted individually for
each channel.
See diagrams
The Stereo/Biamp switch is defeated whenever the front panel Stereo/Mono switch is in the Mono position. In this case, the
Stereo/mono switch overrides the Stereo/Biamp switch, and the amplifier operates in mono mode.
LEVEL CONTROLS
The gain for each channel can be controlled individually using the front panel level control. The controls have 32 detented
positions that are calibrated in dB. The maximum gain position is marked as the "0 dB" position, and the lower gain posi-
tions indicate the amount of attenuation relative to the maximum gain position in dB. Minimum gain position is marked as
“Off” and represents over 100dB of attenuation relative to the maximum gain position.
The CH B level control is used for all Bridged Mono configurations, and 100V and 70V modes (Except for GX2800 Dual
70V mode).each channel. See diagrams
The Stereo/Biamp switch is defeated whenever the front panel Stereo/Mono switch is in the Mono position. In this case, the
Stereo/mono switch overrides the Stereo/Biamp switch, and the amplifier operates in mono mode.
STEREO/MONO 70V 100V SWITCH
Turn amplifier off before operating this switch. This switch will override the Stereo/Biamp switch.
This Stereo/Mono 70V 100V switch is located on the front panel and selects either:
Stereo mode- 2 input signals and 2 output signals.
Mono, 70V, 100V mode- 1 input signal and 1 bridged output signal.
Mono mode uses the CH B input connector and level control only. The output load should be connected across the red ter-
minals of the output connectors. Set both load switches equal to 1/2 the load value. For example, after connecting a 4
Ω
load across the red terminals, set both load switches to 2
Ω
. The rated power into the mono load will be double the rating
for a stereo load. See diagram
+10dB
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