Louroe Electronics AMT-600 Specsheet

LL

OUROEOUROE

EE

6955 VALJEAN AVE, VAN NUYS, CA 91406

LEC TRON ICSLEC TRON ICS

PH: [phone] / FAX: [phone]

[e-mail] / www.louroe.com

INSTALLATION AND OPERATING INSTRUCTIONS

AMT-600

AUDIO LINE DRIVER

DESCRIPTION:

Model AMT-600 Line Driver is part of an audio monitoring system when used for
transmitting audio over such mediums as:

Fiber optics
Telephone wire
rf transmitters
Video Modulators that accept audio input

The AMT-600 supplies 12 Vdc power to the Louroe microphone and receives the audio
signals picked up by the microphone. It amplifies the signals to 0dB @ 600W,

balanced, for input over desired transmission (fiber, video modulators, etc). A built-in
LED illuminates and flickers when the correct balance is maintained. A power supply
(120Vac/12Vdc) is included with the AMT-600. An AMT-600 is required for each Louroe
Microphone.

WIRING REQUIREMENTS

2 Conductor shielded cable, 22
gauge with a 24 gauge drain wire

NOTE: Unshielded cable is not

satisfactory for audio systems

West Penn 452 or equivalent

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INSTALLATION AND OPERATING INSTRUCTIONS

DESCRIPTION OF FUNCTIONS

[1]

[5]

FIGURE 1

[2]

[3]

AA

BB

CC

[4]

[1] - Mic Output Adjust Adjusts the level of microphone audio output. Rotate pot

clockwise to increase the level of audio output; counterclockwise
to decrease. The LED indicator lights and holds a steady low
flicker when the level of audio reaches 0dB.

[2] - Mic Input Terminal Block Connects to remote microphone. Terminal “A” supplies 12Vdc to

the microphone. Terminal “B” accepts audio from microphone.
Terminal “C” is system ground.

[3] - Power Jack Plug 12Vdc adapter (included) to power up the unit and the remote

microphone.

[4] - 0dB Indicator Indicates audio output level (0dB when illuminated and with a

steady low flicker).

[5] - Mic Output Terminal Block Connects to the audio input of the interface equipment (fiber optic

transmitter, video modulator, etc). Provides balanced 600W
audio output.

LOUROE ELECTRONICS, 6955 VALJEAN AVE., VAN NUYS, CA 91406 [phone] FAX [phone]

www.louroe.com / [e-mail]

PAGE 2 OF 5

amt 600(pdf) 704

INSTALLATION AND OPERATING INSTRUCTIONS

WIRING REQUIREMENTS

2 Conductor shielded cable, 22
gauge with a 24 gauge drain wire

NOTE: Unshielded cable is not

satisfactory for audio systems

West Penn 452 or equivalent

WIRING CONNECTION:

Louroe microphone to input side of AMT-600 Line Driver

Using recommended wiring, connect one end to the Louroe microphone terminal block
marked A, B, C as follows:

Red wire to terminal A (12Vdc power) +
Black wire to terminal B (Audio Out)

Bare wire to terminal C (ground) -
Run other end of recommended wiring to the input side of AMT-600 and to its terminal
block (Mic In) marked A, B, C.

Connect red wire to terminal A

Connect black wire to terminal B

Connect bare wire to terminal C

Output side of AMT-600 Line Driver to input of transmission
medium (fiber transmitter, video modulator, etc.)

On the output side of AMT-600 is a 2-pin terminal block marked Mic Out. It is a balanced
output so polarity of the 2-pin terminal block can be interchanged. Still using
recommended 2 conductor shielded cable, connect to Mic Out terminal block as follows:

Red and black wire to Mic Out terminal block (either pin)

Bare wire goes to terminal C of Mic In side of AMT-600

(see wiring connection diagram figure 2)

NOTE: For wiring connection from Output Side of AMT-600 to Audio In of transmission

medium (fiber optics, video modulator, rf transmission, etc.) Please refer to the
specific manufacturer’s installation instructions for that medium.

LOUROE ELECTRONICS, 6955 VALJEAN AVE., VAN NUYS, CA 91406 [phone] FAX [phone]

www.louroe.com / [e-mail]

PAGE 3 OF 5

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Figure 2

12 VDC
SUPPLY

INSTALLATION AND OPERATING INSTRUCTIONS

INTERCONNECTION DIAGRAM

Terminal Block of Louroe Verifact
Microphone
(Models A, B, C, D, E, K or L-DT)

IM

C

I

N

A

B

C

WEST PENN 452 CABLE

2 Conductor shielded, 22 gauge

RED

BLACK

BARE

12 Vdc

C

B

OUTPUT

A

MIC IN

with a 24 gauge drain wire

MIC ADJUST

AMT-600

AUDIO LINE DRIVER

LINE D RIVER

0 dB INDIC ATOR

CONNECTS TO GROUND (BARE)

To audio input of transmission
medium: fiber optics,
modulator, telephone wire, rf
transmitter

REFER TO THE SPECIFIC
MANUFACTURER’S INSTALLATION
INSTRUCTIONS for audio connection

MIC OUT

ELEC TRONICS

LOUROE

RED

BLACK

AMT-600 Remote Station

BARE WIRE CONNECTS TO TERMINAL C
OF INPUT SIDE OF AMT-600

AMT-600

SHIELDED AUDIO CABLE

WEST PENN 452

BLACK

RED

LOUROE ELECTRONICS, 6955 VALJEAN AVE., VAN NUYS, CA 91406 [phone] FAX [phone]

www.louroe.com / [e-mail]

PAGE 4 OF 5

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INSTALLATION AND OPERATING INSTRUCTIONS

OPERATION AND TEST

After all wiring connections are complete, apply 12Vdc power to the power jack located
on the AMT-600, using the 120 Vac/12Vdc power supply (included). This will phantom
power the Louroe microphone.

Setting the 0dB output level

Located on the output side of the AMT-600 is a red LED marked 0dB indicator. To obtain
the correct level, create some audio activity at the microphone area by talking, playing a
radio, etc. Located on the input side of the AMT-600 is a Mic Output adjust pot. Slowly
rotate clockwise to increase the level of audio output. When the red LED reaches a
steady low flicker, this indicates the audio level has reached 0dB each time it flickers. If
while rotating the pot clockwise the LED illuminates a steady glow (no flickering), this
indicates the audio level has exceeded 0dB. Slowly rotate counterclockwise to obtain the
desired level, indicated by a steady low flicker.

CHECKING THE LISTENING LEVEL AT THE AMPLIFIED OUTPUT

If the AMT-600 Line Driver is being interfaced with fiber optic transmission, rf transmitters
or telephone wire, there is usually a Louroe audio base station at the head-end for
providing audio. Adjust the volume control for the desired level.

If the AMT-600 Line Driver is being interfaced with a video modulator, check for
satisfactory audio output from the amplifier(CCTV with audio, etc.) TV set by adjusting the
volume control.

IMPORTANT NOTE

If the audio base station at the head-end is a Louroe Sound Activated Alarming Base
Station (models ALA-4, ALA-8, DG-12II or DG-25III), make sure the 0db setting at the
AMT-600 will allow the base station to be triggered if a sound exceeding the set threshold
level occurs (scream, breaking glass, etc.)

SPECIFICATIONS

Input sensitivity

Output impedance
Frequency response

Maximum output voltage
Power supply voltage

Dimensions
Weight, net

-10dB
600 balanced line

400 Hz to 10 kHz 1 dB

4 Vrms
12Vdc, 500 mA

6 1/8”L x 4 5/8”W x 1 7/8”H

6.6 oz.(0.19 Kg)

LOUROE ELECTRONICS, 6955 VALJEAN AVE., VAN NUYS, CA 91406 [phone] FAX [phone]

www.louroe.com / [e-mail]

PAGE 5 OF 5

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NOTES

LOUROE ELECTRONICS, 6955 VALJEAN AVE., VAN NUYS, CA 91406 [phone] FAX [phone]

www.louroe.com / [e-mail]

amt 600(pdf) 704

IMPORTANT NOTICE

When this equipment is used as part of an
audio monitoring system, the law requires
that the public be given notice of AUDIO
MONITORING ON THE PREMISES. A
deca l notice is incl uded w ith ea ch
microphone shipped.

Federal Law References:
Federal Regulations, US Code, Title 18.
Crime and Criminal Procedure, Sec 2510.

AUDIO

MONITORING

On

These Premises

OUROE

L

LECTRONICS

E

LOUROE ELECTRONICS warrants that at the time of shipment products manufactured by LOUROE ELECTRONICS to be free of defects in material and workmanship.
Should a defect appear within one year (12 months) from date of shipment, LOUROE ELECTRONICS will, at its sole discretion, repair or replace the defective equipment.
This equipment shall not be accepted for repair or return without prior notification by LOUROE ELECTRONICS.

This warranty does not extend to any Louroe product that has been subjected to improper or incorrect installation, misuse, accident, or in violation of installation
instructions provided by LOUROE ELECTRONICS.

WARRANTY

Returned shipments to LOUROE ELECTRONICS shall be at customer’s expense. LOUROE ELECTRONICS will return the equipment prepaid via best way.

LOUROE ELECTRONICS, 6955 VALJEAN AVE., VAN NUYS, CA 91406 [phone] FAX [phone]

www.louroe.com / [e-mail]

amt 600(pdf) 704

LL

OUROEOUROE

EE

LECTR ONICSLECTR ONICS

MANUFACTURED

IN THE

LOUROE ELECTRONICS 6955 VALJEAN AVENUE, VAN NUYS, CA 91406 TEL [phone] FAX [phone]

Website: www.louroe.com Email: [e-mail]