LY International PB-2811P User manual

PRE AMPLIFIER PB-2811P
USER MANUAL
LY International Electronics Co Ltd
Http://www.lyintlcorp.com/
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Thank you for purchasing the Pre Amplifier.
Please carefully follow the instructions in this ma nual to ensure long,
trouble-free use of the equipment.
Accessories
AC power cord .................................................... 1
User manual ....................................................... 1
Audio cable ........................................................1
Warranty card .....................................................1
Safety Precautions
The lightning flash with arrowhead
symbol, wit hin an e quilateral triangle, is
intended to alert the user to the presence
of uninsulated "dangerous voltage" within
the product's enclosure that may be of
suff icient magnitude to constitute a risk
of elect ric shoc k to p ersons.
The exclamation point within an
equilateral triangle is intended to alert
the user to the presence of important
operating and maintenance (servicing)
instructions in the literature
accompanying the ap pliance.
• Before installation or use, be sure to carefully read all the instructions in this section
for correct and safe operation.
• Be sure to follow a ll the precautionary instructions in t his sec tion, which contain
imp ortant warnings and/o r cautions regardin g safety.
• After reading, keep this manual handy for future reference.
Indicates a potentially hazardous situation which ,
if mishandled, could result in moderate or minor
personal injury, and/or property damage.
CAUTION
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1.This equipment has passed the strict inspection, however, you should turn
off the power, pull out the power plug when discover some following anomalies
in case, and contact the dealer.
A.If smelled smoke and peculiar smell which set out from the equipment.
B.If water or any metal immerge or fall into the equipment.
C.If the equipment fell or the shell damaged.
D.If the power cable damaged.
E.If the equipment failed.
F.If the equipment distorted badly.
2.This equipment contains high voltage components, please do not arbitrarily
open, so as not to cause fire or electric shock, if need to maintain, please
contact dealer or professionals to handle
3.Do not lay liquid container or metal on the equipment top, if they fall into the
equipment, it may cause fire or electric shock
4.Do not fall metal or flammable object into the ventilation slot, so as not to
cause fire or electric shock. Do not touch the power plug when thundering
and fulmination, so as not to cause injury of electric shock .
5.Do not lay heavy object on the equipment top, so as to avoid falling or
damage, and even cause injury to persons or damage to equipment and
property, in addition, heavy object falling itself may cause injury or damage.
Operation Notes
6.If found voice distortion situation, please do not operate this equipment for long
time, this is also a fault alarm message, if use unceasingly ,it may cause
overheating and fire.
7.To clean equipment, please contact with the dealer, if the dust accumulated in
the equipment for long time, it may cause fire or damage.
8.Lay this equipment on a stable location, and make a appropriate treatment to
prevent falling, otherwise it may cause the equipment falling, and cause injury
to persons or damage to equipment and property.
9.So as to avoid the inner temperature to rise, the equipment should be 10
centimeter far from the barrier.
PRE AMPLIFIER PB-2811P PRE AMPLIFIER PB-2811P

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Descriptions & Features
The Rack-mount Pre Amplifier is designed for background
music/paging and public address system installations,
these units are exceptional values, loaded with features,
and are easy to install in a variety of system designs.
The PA Pre Amplifier supports power amplifiers to work,
features muting function.that MIC1 overrides MIC2,
MIC3,AUX1,AUX2 with 0~30dB dB attenuation.
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5 MIC inputs, 3 AUX inputs, 2 EMC input,4 AUX outputs.
Individual volume controller for MIC & AUX inputs.
MASTER volume controller ,BASS and TREBLE tone controller.
EMC1,2 have priority over all inputs except MIC1.
Built in SIREN circuitry with pushbutton on front panel for an orderly emergency
evacuation of people and conducting a fire or an emergency drill manually
Connecting Alam Panel for emergency broadcasting automaticlly
Built in CHIME circuitry with pushbutton on front panel for attracting listeners’
attention prior to speaking.
4 signal outputs for connecting 4 units of power amplifiers.
Connection Illustration
CD P la yer
Paging Micropho ne
CO M100vPOWER A MP LIFIER
(350W/4 50 W/ 650W)
Pre A mplifier
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Built in SIREN circuitry with pushbutton on front panel for an orderly
emergency evacuation of people and conducting a fire or
an emergency drill manually
Connecting Alam Panel for emergency broadcasting automaticlly
Built in CHIME circuitry with pushbutton on front panel for attracting
listeners’ attention prior to speaking.
4 signal outputs for connecting 4 units of power amplifiers.
Note:
PRE AMPLIFIER PB-2811P PRE AMPLIFIER PB-2811P

Front panel
Rear panel
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PRE AMPLIFIER PB-2811P PRE AMPLIFIER PB-2811P
Power Indicator Signal Indicator Chime Music
Siren Music Power Switch Master Volume
Bass Control Treble Control AUX3 Volume
AUX2 Volume AUX1 Volume MIC5 Input
6
MIC4 Volume MIC3 Volume MIC2 Volume
MIC1 Volume MIC1 Input
6
MIC2 Input MIC3 Input MIC4 Input
MIC5 Input E InputMC1 EMC2 Input
AUX1 Input AUX2 Input AUX3 Input
Four Signal Outputs AC Power Supply
Specifications
Model PB-2811P
MIC Input MIC 1,2,3,4,5: 18mV/600 ohms, Unbalanced
AUX Input AUX 1,2,3: 200mV/10k ohms, Unbalanced
EMC Input EMC 1,2: 1.5V/10k ohms, Unbalanced
Tone BASS:±10dB at 100Hz,TREBLE:±10dB at 10KHz
Frequency Response 20Hz - 20KHz
S/N Ratio MIC 1,2: 70dB; AUX 1,2,3: 80dB
THD Less than 0.1%
Muting Function
MIC 1 overrides other input signals with 0-30 dB
attenuation,EMC1,2 overrides all inputs except
LED Indicators POWER
Protection AC fuse
Power Requirements AC220V±10%,50/60Hz
Power Consumption 50W
Dimensions (W×D×H) 483(W)×366(D)×89(H)mm
Weight 7.5Kg