Louroe Electronics ASK-4 # 304-C Specsheet

ASK-4® # 304-C

AUDIO MONITORING SYSTEM

INSTALLATION AND OPERATING INSTRUCTIONS

ASK-4® # 304-C (LE-376)

ASK-4® #304-C is a four zone audio monitoring system designed for direct connection to a DVR, PC soundcard or IP Network Camera. Model IF-4 Inter-

face Adapter (usually mounted near the recording device) receives the wiring from the Verifact™ C Microphone, supplies power and drives the audio signals
into the DVR, IP Network Camera, Video Server or PC Soundcard.

Distance between the Verifact™ B Microphone and Model IF-4 Interface Adapter may be up to 1,000 ft.(305m) using recommended wiring. Each output of

the IF-4 has an audio level control to increase or decrease the level of audio output going to the receiving device. The microphones are designed to be used
in high ceiling applications. The standard length of the cable is 3’.

KIT CONTENT
PRD #

(4) Verifact™ C Microphone
(LE-072)

Description

Line Level, Electret condenser microphone with preamp. Picks up normal sounds within 30’ circle. May be located Up to

1000’ from IF-4 Interface Adapter.

Model IF-4
(LE-288)

AD-1 (LE-242)

(4) Single RCA Cable

(4) RCA to 3.5mm Mono

Adapter

VERIFACT™ “C” (LE-072)

Type

Output Line Level 0 dB @ 1KΩ,

Frequency Response 40 Hz to 15 kHz ± 1 dB

Current Drain

Supply voltage 12Vdc

Dimensions

Weight (shipping)

4 Zone Audio Interface Adapter. Provides power and gain and to microphones.

listed AC ADAPTER. Supplies 12 Vdc to IF-4 and Verifact “C” Microophones.

For connection to DVR, VCR, etc

For connection to an IP Camera with a Adaptor 3.5mm mono audio input

Electrect Condenser

unbalanced

4 mA

4”Dia x 1 ½”H

0.12 Lbs (0.05kg)

VERIFACT™ “C” (LE-072)

Mic Input

Terminal
Block

IF-4 (LE-288)

Input Impedance

Output Signal

Power Supply

Dimensions

Weight (shipping) 2 Lbs (0.9kg)

6955 VALJEAN AVE. VAN NUYS, CA 91406 PH: 818-994-6489 | FAX: [phone] | [e-mail] | WWW.LOUROE.COM

1KΩ

0 dB@600Ω

12Vdc, 500 mA

6 1/8”L x 4 5/8”W x 1 3/8”H

Audio Indicator

Audio Out 1

Audio Out 2

Audio Out 3

Audio Out 4

AUDIO OUTPUTS

IF-4

MIC INPUTS

Volume Control

Mic Input

Terminal
Block

Power LED

12Vdc Power Jack

INTERCONNECTION DIAGRAM

IF-4

WIRING REQUIREMENTS

Both the Verifact™ “C” Microphone and IF-4 Interface.

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

wire.

NOTE: Unshielded cable is not satisfactory for audio systems

ASK-4® # 304-C

AUDIO MONITORING SYSTEM

INSTALLATION AND OPERATING INSTRUCTIONS

VERIFACT™ “C” (LE-072)

PLUG IDENTIFICATION

One bands stereo

RCA PLUG 3.5 MONO

One Band MONO

IF-4 (LE-288)

Two bands stereo

3.5MM STEREO

Two Band STEREO

1 2 3 4

+12 Vdc

MIC INPUTS

AUDIO OUTPUTS

MIC Input

A B C A B C A B C A B C

Audio Output Control

A B C

Terminal block Identier

for Microphone

(A) Red - 12Vdc power
(B) Black - Audio Output

(C) Bare - Ground

AD-1 AC Adapter
12V/12Vdc, 500mA

RCA Connection Cable

RCA Audio Input

RCA to 3.5mm MONO

OR OR

12 34

AUDIO IN

DVR WITH RCA TYPE AUDIO INPUTS VIDEO SERVER

IP NETWORK CAMERA

6955 VALJEAN AVE. VAN NUYS, CA 91406 PH: 818-994-6489 | FAX: [phone] | [e-mail] | WWW.LOUROE.COM

ASK-4® # 304-C

AUDIO MONITORING SYSTEM

INSTALLATION AND OPERATING INSTRUCTIONS

INSTALLATION INSTRUCTIONS

WIRING CONNECTIONS

Located at the bottom of the Verifact™ “C” microphone is a 3-pin termi-

nal block marked A, B, and C.

A Red 12Vdc power

B Black Audio output of microphone

C Bare Ground (common)

After all microphones have been connected, bring the other end of the

cable to the IF-4 location and connect each microphone to the corre-

sponding terminal block of the unit matching A to A, B to B, and C to C.

Be sure to properly match wire colors. If using cable from other manu-

facturers, color code may vary.

APPLYING POWER TO THE IF-4

Included with the IF-4 is a power supply (120V/12Vdc). Connect the

small end of the 90° female plug into the 12Vdc jack, located on the

input side. Then connect the two-prong large end into a standard
110/120V electrical outlet.

Turn ON/OFF power switch, located behind green power LED to ON
position. The green LED will illuminate, indicating power to the system.
The system will now provide audio to the DVR, Soundcard Module, IP
Network Camera, etc.

AUDIO LEVEL ADJUSTMENT

Located on the input side are potentiometers (round, with adjustment

arrow) for each microphone. This is for adjusting the audio gain and to
prevent overdriving or underdriving the audio signal.

CHOOSE YOUR SETTING

DVR/VCR - RECORDING INSTRUCTIONS
Connections between IF-4 and DVR (or other audio receiving de-

vice). Connect the rca outputs of the IF-4 to the corresponding audio
inputs of the receiving device. RCA and RCA to 3.5mm mono adapters
are included in the kit.

IP NETWORK CAMERA INSTRUCTIONS
Connection between IF-4 and an IP Network camera, DVR, Video

Server with 3.5Mm mono type audio connections. To make connection
to ip network camera, plug the rca to 3.5Mm mono cable with adaptor

(supplied) into the rca audio out jack located on the output side of if-

4, connect other end of cable (3.5mm) to the camera’s audio in jack.

NOTE

SENSITIVITY SWITCH OF MICROPHONE

For special installations that require less microphone sensitivity, a sen­sitivity switch has been added to the microphone pre-amp (PC board)

and has two positions - N and L: N represents normal sensitivity (0dB
output into 1KΩ) L represents low sensitivity (-6dB output into 1 KΩ).

NOTE: Louroe Verifact™ microphones are always shipped with the
sensitivity switch in normal (N) position. Do not change unless re­quired. To make an adjustment, use a small screwdriver and move
slide switch from N to L. Sensitivity switch is located on the backside
of Verifact™ “C” Microphone.

The adjustment arrows are shipped in the straight-up position. Turn

slowly counterclockwise to lower the gain, and clockwise to increase.

This will provide the desired level of audio signal into the Audio Re-

ceiving Device (DVR, Soundcard Module, etc.). A full turn clockwise

increases the gain to 10dB. A full turn counterclockwise will decrease
the gain 30dB.

AUDIO TEST SWITCH

The purpose of this switch is to indicate the presence of audio and to
assure the user that the IF-4 is driving the audio signals into the au-

dio input of receiving device (DVR, IP Network Camera, Video Server,
Soundcard module, etc.)

Located on the audio output side of IF-4 is a DIP switch labeled Audio
Test Switch. To the left of the switch is a red LED marked Audio Indi­cator.

For testing:

1. Select a zone that has a microphone connected to the microphone
terminal block. IF-4 utilizes pins 1-4.

2. Push pin to the ON position. The red LED will illuminate, indicating

audio is present. With short bursts of audio, the LED will icker
and with continuous ow of audio LED illumination is constant.

Only one microphone can be tested at a time

NOTE: When testing is complete, all pins of the DIP switch must be
in the OFF (down) position.

6955 VALJEAN AVE. VAN NUYS, CA 91406 PH: 818-994-6489 | FAX: [phone] | [e-mail] | WWW.LOUROE.COM

ASK-4® # 304-C

AUDIO MONITORING SYSTEM

INSTALLATION AND OPERATING INSTRUCTIONS

WARRANTY

LOUROE ELECTRONICS® warrants that at the time of shipment products
manufactured by LOUROE ELECTRONICS® to be free of defects in mate-

rial 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 notication by LOUROE ELEC­TRONICS®.

This warranty does not extend to any Louroe product that has been sub-

jected to improper or incorrect installation, misuse, accident, or in violation
of installation instructions provided by LOUROE ELECTRONICS®.

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

best way.

ABOUT LOUROE ELECTRONICS

Located in Van Nuys, California and 32 years young, Louroe Electronics™
has been the world leading Audio Manufacturer. Our continued growth
has resulted from providing innovative products, receiving high customer
satisfaction, maintaining strict devotion to quality standards and following
the law in Federal, State and Municipal Jurisdiction.

Our “Verifact” line of amplied microphones, complementing base stations,
and communication accessories, provide line level output to interface with

various digital electronics. Our products are compatible with a wide range

of digital video recorders, video cassette recorder, Internet Protocol Net­work video systems, video servers and computer based recorders.

We are recognized worldwide for our variety of audio monitoring technol­ogy. Our products are used in over twenty countries and are utilized in both
the private sector and government applications. We currently serve the

needs of law enforcement, security, health care, entertainment, hospitality

and retail industries and many more.

At Louroe Electronics we maintain rigorous standards to ensure our

products provide reliability, durability and excellent performance for our
customers’ needs. We are proud to continue designing, engineering and
manufacturing at our headquarters base in Van Nuys, California.

IMPORTANT NOTICE

When this equipment is used as part of an audio moni-

toring system, the law requires that the public be given
notice of AUDIO MONITORING ON THE PREMISES. A

decal notice is included with each microphone shipped.

FEDERAL LAW REFERENCES:
Federal Regulations, US Code, Title 18. Crime and
Criminal Procedure, Sec 2510.

MADE IN U.S.A

WORLD LEADER IN AUDIO MONITORING TECHNOLOGY

6955 VALJEAN AVE. VAN NUYS, CA 91406 PH: 818-994-6489 | FAX: [phone]|

[e-mail] | WWW.LOUROE.COM