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Measuring instruments
The amplifiers of the
LAX
range are designed specifically for induc-
tive sound transmission and are used in particular in dedicated audio
systems for hearing-aid wearers. Most modern hearing aids have a
two-position switch, the positions being marked “M” and “T”. Position
“M” is for “normal” listening through the microphone. Position “T” (Te-
lecoil) is for inductive sound reception, through a special coil built into
the hearing aid.
The output from the current amplifier feeds a loop made of suitably
insulated normal copper wire positioned on the perimeter within which
to broadcast sound. The current running through the loop generates
a variable magnetic field in the room that is “induced” in the coil of
the hearing aid. As a rule, this magnetic field is sufficiently strong to
enable the person to move about freely, still enjoying a comfortable
level of reception.
The main advantage of this system is that the sound reaches the user
in an undistorted manner free from any ambient noise, echo or rever-
beration, and is therefore perfectly intelligible. The use of induction
systems for hearing-aid wearers is becoming increasingly widespread
in public places such as theatres, churches, banks, schools and offi-
ces etc., and there are also effective and increasingly numerous hou-
sehold applications, with connections to the television set, the radios,
the telephone and/or the door-phone.
MODEL
LAX200
LAX450
LAX800
LAX50
Audio inputs
3, XLR (2 balanced microphones, 1 MIC/LINE selectable) - Phantom 15 V selectable
2 micro (jack mono 3,5 mm) with phantom 4,5 V
Sensitivity
-50 dB (MIC), -10 dB (LINE)
-50 dB
Impedance of loop
from 0,1 Ω to 1 Ω
RMS current
2 A (@ 1 KHz)
3 A (@ 1 KHz)
4 A (@ 1 KHz)
1,5 A (@ 1 KHz)
Mains power supply
230 Vac – 50/60 Hz
Consumption
100 VA max
180 VA max
300 VA max
20 VA max
Dimensions (W x H x D)
430 x 44 x 220 mm
91 x 170 x 33 mm
19" rack mounting
Optional 27/4555 backets (1U)
-
Weight
3,7 kg
4 kg
4,3 kg
0,6 kg
LAX50
Current amplifier up to 50 mq
LAX200
Current amplifier up to 200 mq
LAX450
Current amplifier up to 450 mq
LAX800
Current amplifier up to 800 mq
Accessories
LACF01
Feeder cable, 50 m
LACL10
Loop feeder cable, 100 m
LAC50
Induction coil for counters or tables (LAX50)
LALT01
Scotch tape for LACF01, 50 m
LAL01
Loop present stickers (10 pcs.)
LAM50
Tie clip microphone (LAX50)
LASC100
SCART adaptor for TV (LAX200/450/800)
LASC50
SCART adaptor for TV (LAX50)
LATR100
Interface for 100 V line (LAX200/450/800)
LATR50
Interface for 100 V line (LAX50)
LASFM01
Magnetic-field measuring instrument
This instrument enables accurate measurement
of the magnetic field inside the area covered by
the current loop and therefore control of the in-
stallation and regular maintenance.
LARX01
Sample receiver
This enables reception and control of the pro-
gramme being transmitted by means of the ma-
gnetic induction system. It is supplied complete
with headphones.
LAX range
|
Current amplifiers
Systems for hearing-aid wearers