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HEADPHONE AMPLIFIERS
High quality,push-pull headphone
amplifiers are employed with an
output level (PS Series) nom.1W
rms @ 200 Ohm and (BASIC Series)
400 mW @ 200 Ohms.The
complete system offers a frequency
response (BASIC Series) 200 Hz to
13 KHZ (PRO SERIES) 200 Hz to 15
KHz with a dynamic range of 80 db.
Special proprietary frequency
contouring circuitry ensures high
intelligibility for voice and
communications.
SIDE TONE
Every user station has a side tone
trimmer for each channel.It is used
to adjust the level of the users voice
as heard over his own headset or
loudspeaker.
POWER SUPPLIES
All the power supplies are of the
switch mode type. In case of short
circuits, faulty wirings, or dangerous
thermal conditions the PSU will stay
unharmed,will reduce power,and
eventually shut down.Once the
faulty condition has been removed,
the power supply will automatically
reset and full power will be
restored.
TALK
TALK buttons with green LED
indicator enable the user to talk to
one channel only or more channels
simultaneously.The TALK buttons of
the PRO SERIES are latching or
momentary (latching when only
pushed quickly - momentary when
holding for longer than 2 seconds).
CALL
The combined visual and audio call
system covers light and/or sound
sensitive environments. CALL
buttons enable the user to generate
a call signal to each channel
separately.An incoming or outgoing
call signal is indicated by a large red
LED. If a CALL button is held for
more than 2 seconds, the internal
audio BUZZER is activated.The
volume of the BUZZER sound can
be trimmed or muted.
AUX INPUT
An electronically balanced auxiliary
input on the master stations and
multi-channel power supplies, feeds
auditorium program onto the
intercom line.The inputs of the
BASIC Series can be switched
between line or 30V phantom
powered mic level.The PRO Series
has a line input with a ‘ground lift’
switch.
BASIC SERIES FEATURES
■ Strong ABS beltpacks for light weight and durability
■ Unique visual and audible call system with volume trimmers
■ Powering for dynamic or electret headset mics as standard
■ Separate TALK- and CALL functions with large LED indicators
■ Auto resetting switch mode power supplies for 110/240 V mains
■ Proprietary frequency correction for high intelligibility
■ Automatic headset detection
■ Auxiliary program input
PRO SERIES FEATURES
■ Latching or momentary TALK buttons
■ One, two, four and six channel user stations
■ Strong ABS beltpacks for light weight or strong aluminium beltpacks for
durability
■ Separate CALL and TALK functions with large LED indicators
■ Unique visual and audible call system with volume trimmers
■ Remote mic mute and buzzer (audible call) mute
■ Powering for dynamic or electret headset mics as standard
■ Headphone volume and dynamic range exceeds normal industry
standards
■ Extended frequency response and proprietary frequency correction for
high intelligibility
■ Individual side tone and buzzer volume trimmers at each user station
■ Auto resetting switch mode power supplies
■ Auxiliary program inputs
■ Electronic switching
■ Automatic headset detection
■ Optional binaural headset operation for multichannel-stations
■ DC input
■ System Link
BASIC & PRO SERIES
FEATURES
HEADSETS
Headsets with dynamic or electret
microphones can be connected as
standard.The mic gain can be
adjusted internally to suit all
possible input levels.A headset
detection circuitry ensures the mic
pre-amp is only active when a
headset is connected.
Headset/Speaker volume controls
enable the user to listen to the
communication signal at any
required level and,at multi-channel
stations, at any required balance.
(11 pages)
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