Руководство Пользователя для Electrovoice 205-4t
DESCRIPTION
Especially designed for permanent installations, the CPS2T power amplifier offers performance-consi-
stent and reliable operation of PA-systems with 2 individual loudspeaker lines, each. Therefore, power
amplifier is most suitable for company intercom, alarm and background music transmission installations
in offices and commercial areas, congregation and sport centers, schools, houses of worship, hotels,
hospitals, shopping malls and super markets, cruise ships, and other similar applications.
stent and reliable operation of PA-systems with 2 individual loudspeaker lines, each. Therefore, power
amplifier is most suitable for company intercom, alarm and background music transmission installations
in offices and commercial areas, congregation and sport centers, schools, houses of worship, hotels,
hospitals, shopping malls and super markets, cruise ships, and other similar applications.
The CPS2T incorporates two high-performance output transformers. Next to 100 V, 70 V, and 25 V floating
outputs, the direct outputs provide the possibility to also drive loudspeaker systems with low-impedance
down to a minimum of 4 ohms. Simultaneous operation of low-impedance speaker systems and floating
loudspeaker lines on a single output channel of the power amplifiers is possible as well.
outputs, the direct outputs provide the possibility to also drive loudspeaker systems with low-impedance
down to a minimum of 4 ohms. Simultaneous operation of low-impedance speaker systems and floating
loudspeaker lines on a single output channel of the power amplifiers is possible as well.
The integrated 45 Hz High-pass filter with 18 dB/oct. slope protects the connected loudspeaker lines from
unwanted ultra-low frequencies.
unwanted ultra-low frequencies.
Comparator circuitry constantly monitors the input and output signals of the power amplifiers and activates
their internal limiters whenever non-linear operation is encountered which reliably protects the connected
loudspeaker systems against overload conditions and clipping, saturation of the output transformers, and
overvoltage at the outputs. The employed comprehensive dimensioned power supply units with low-in-
terference toroidal transformers ensure that the stated nominal performance specifications are accom-
plished, even in most demanding and critical installations. Since the CPS2T do not employ
V/I-Foldback-Limiter circuits, operation on complex loads up to ±90° phase angles is possible without a
problem.
their internal limiters whenever non-linear operation is encountered which reliably protects the connected
loudspeaker systems against overload conditions and clipping, saturation of the output transformers, and
overvoltage at the outputs. The employed comprehensive dimensioned power supply units with low-in-
terference toroidal transformers ensure that the stated nominal performance specifications are accom-
plished, even in most demanding and critical installations. Since the CPS2T do not employ
V/I-Foldback-Limiter circuits, operation on complex loads up to ±90° phase angles is possible without a
problem.
Quick optical information on the power amplifiers’ momentary operational status is provided through easily
readable LED indicators, individually showing whether a channel is ready for operation, a signal is present
at the output, if any of the limiter circuits and/or one of the protection circuits has been activated.
readable LED indicators, individually showing whether a channel is ready for operation, a signal is present
at the output, if any of the limiter circuits and/or one of the protection circuits has been activated.
The inputs are electronically balanced and carried out as XLRF-type and as binding post clamping
connectors as well. Parallel linking the two connector types at the input provides the possibility to utilize
the carried-through signals to feed additional power amplifiers, without the necessity for special split-cab-
les. Both inputs can be optionally retrofitted with input transformers. Through Input Routing switches it is
possible to configure the CPS2T for stereo, parallel-monaural, or bridged-mode operation.
connectors as well. Parallel linking the two connector types at the input provides the possibility to utilize
the carried-through signals to feed additional power amplifiers, without the necessity for special split-cab-
les. Both inputs can be optionally retrofitted with input transformers. Through Input Routing switches it is
possible to configure the CPS2T for stereo, parallel-monaural, or bridged-mode operation.
The dB-scaled level controls – extremely precise and good to operate potentiometers – are located on
the rear of the appliances. A Ground-Lift switch, which helps eliminating ground noise loops by separating
the amplifier circuit ground from the common ground of the enclosure, is also to be found on the rear
panels. Conveniently connecting the loudspeaker lines to the power amplifiers is provided through a
binding post strip, where all voltages – 25 V, 70 V, 100 V – and the low-impedance output are present on
individual screw-clamp connectors. The rear panel service mains switches allow turning the power
amplifiers’ power on directly. Using the provided power remote input, remote-start is also possible.
the rear of the appliances. A Ground-Lift switch, which helps eliminating ground noise loops by separating
the amplifier circuit ground from the common ground of the enclosure, is also to be found on the rear
panels. Conveniently connecting the loudspeaker lines to the power amplifiers is provided through a
binding post strip, where all voltages – 25 V, 70 V, 100 V – and the low-impedance output are present on
individual screw-clamp connectors. The rear panel service mains switches allow turning the power
amplifiers’ power on directly. Using the provided power remote input, remote-start is also possible.
Consistent thermal stability of the power amplifiers is obtained through extremely silent running fans which
are automatically switched stepwise depending on the amplifiers’ operation mode. The front-to-rear air
circulation guarantees trouble-free operation in rack-shelf enclosures of any size.
are automatically switched stepwise depending on the amplifiers’ operation mode. The front-to-rear air
circulation guarantees trouble-free operation in rack-shelf enclosures of any size.
Several other features of the CPS2T are revealed within this owner’s manual. Therefore, please take the
time to carefully and entirely read the provided information.
time to carefully and entirely read the provided information.
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