SENSITIVITY SWITCH OF VERIFACT™ “C” MICROPHONE
For special installations that require less microphone sensitivity or where there
is background noise, a sensitivity switch is mounted to the microphone pre-amp
(PC Board) and has two positions, N and L:
• N represents normal sensitivity (0dB ouput into 1kΩ)
• L represents low sensitivity (-6dB output into 1kΩ)
Louroe VERIFACT™ microphones are always shipped with the sensitivity switch
in normal (N) position. Do not change unless necessary. To change the sensitiv-
ity setting, use a small screwdriver and move slide switch from N to L position.
The switch is mounted on the back side of the microphone housing.
NOTE REGARDING INTERFACING ASK-4 KIT #101 WITH A DVR OR PC SOUNDCARD
The APR-1 Audio Base Station of ASK-4 Kit #101 is compatible with all commercial
DVR’s and PC Soundcards that accept line level input (0dB@600Ω). An RCA cable
is included with the kit for connecting Audio Out to Audio In of DVR. If DVR’s audio
input is a 3.5mm jack, an RCA to 3.5mm adapter (not supplied) must be attached to
the plug that connects to DVR’s Audio Input. Check with DVR’s specifications to
determine if the audio input requires a stereo or mono 3.5mm plug.
PC soundcards contain a standard 3.5mm stereo Audio Input or Line Input. Do not
use Mic Input of soundcard. Louroe microphones are line level (0dB@600Ω) and will
overdrive the Mic Input. Use “Audio Input” or Line Input” of the soundcard.
WIRING CONNECTIONS AND TEST
1. Starting with the microphone, connect RED wire to Pin A, BLACK wire to
Pin B and BARE wire to Pin C. Connect other end of cable to Terminal
Block on back panel of APR-1 Base Station matching RED wire to Pin A,
BLACK wire to Pin B and BARE wire to Pin C. Refer to drawing on page 2.
2. Plug AD-1 power supply (AC Adapter) into the Power Jack[10] located
on back panel of APR-1 first. Then connect 2- prong block into standard
110/120 AC wall receptacle or power strip.
3. Turn “ON” power to APR-1 by rotating the Power-Volume Knob[1] clock-
wise. The green PWR[2] LED will illuminate.
Adjust volume of audio by rotat-
ing the knob either clockwise to increase or counterclockwise to decrease.
Locate microphone so as not to create feedback with the APR-1. The further
the microphone is from the APR-1 the less feedback it generates. System
works best if there is an acoustical barrier between the microphone and
the
APR-1, such as a wall or room divider. If there is no wall or barrier,
microphone should be mounted at least 25 ft. from the APR-1 Base Station.
4. Plug headphone into the Headphone Jack[8]. Speaker[9] output is muted
and sound is transmitted through the headphone.
5. Using the dual RCA cable (supplied), connect DVR/VCR’s AUDIO OUT
jack to APR-1’s AUDIO IN Jack[11].
6. Connect DVR/VCR’s AUDIO IN jack to APR-1’s AUDIO OUT Jack[12]
7. Press “REC” on the recording device and record live audio for several minutes.
8. Press Push for Playback Switch[7] to “ON” position. Playback Indicator
LED[4] will illuminate yellow.
9. Press “PLAY” on the DVR/VCR to playback recorded audio from the APR-1.
10. Press Mute Switch[6] to mute audio heard on the speaker. Mute Indicator
LED[3] will light and no audio can be heard on the speaker on both live and
playback audio. When Mute Switch[6] is ON Playback Indicator LED[4]
will not light even when the Push for Playback Switch[7] is pushed in and
the audio is muted.
SPECIFICATIONS
VERIFACT™ “C” (LE-072)
Type
Electrect Condenser
Output
Line Level 0 dB @ 1KΩ,
unbalanced
Frequency Response
40 Hz to 15 kHz ± 1 dB
Current Drain
4 mA
Supply voltage
12Vdc
Dimensions
4”Dia x 1 ½”H
APR-1 (LE-146)
Input sensitivity (mic)
0.78V
Monitor output power
1W@8Ω
Audio line output impedance
600Ω or higher
Audio input impedance
10K
Freq. response
100 Hz to 10 kHz
Headphone impedance
8 to 600Ω
Universal power supply
12 Vdc, 500 mA
Dimensions
8 ¼”L x 5 ¾”W x 1 ⅜”H
Weight (shipping)
4 lbs. (1.8)Kg
INSTALLATION TIPS
1. Use overall shielded audio cable only. West Penn 452, Belden 8451
or equivalent.
UNSHIELDED CABLE IS NOT SATISFACTORY FOR
SOUND SYSTEMS.
2. When used in cashier’s booth, microphon should be installed
closer to the customer rather than the cash register, as the drawer
sound may dominate the recording. It should be installed clos-
est to the area that needs to be monitored and documented.
3. Avoid installing microphone near air vents, air conditioner, fans and
other equipment that generate high sound and air pressure.
4. If using a VCR, it may have both intermittent and constant speed
playback. See VCR’s manual on how to select constant speed.
5. The APR-1 and microphone should have a barrier or solid wall between
them in order to avoid audio feedback, especially when they are in
close proximity to each other up to 25’ (7.6 m).
WIRING CONNEC-
TIONS AND TEST
ASK-4
®
# 101-C
AUDIO MONITORING SYSTEM
INSTALLATION AND OPERATING INSTRUCTIONS
6955 VALJEAN AVE. VAN NUYS, CA 91406 PH: 818-994-6489 | FAX: 818-994-6485 | [email protected] | WWW.LOUROE.COM
6955 VALJEAN AVE. VAN NUYS, CA 91406 PH: 818-994-6489 | FAX: 818-994-6485 | [email protected] | WWW.LOUROE.COM
