LY International PB 1500 User manual

1
Public Address Amplifiers
PB 1500
PB 2000
PB 2500
Before operating, please read this manual completely!
FEATURES
 Transformer isolated 100V, 70V and 4 Ohms speaker outputs.
 5 LED indicator for status display.
 XLR socket and 6.35mm jack for link convenient.
 Output circuit shorting protection & display.
 Series amplifiers of high output power available.
O W N E R ’ S M AN U AL

2
AMPLIFIER FRONT VIEW
1. AC power switch(1 is power on and the
“power LED” is on )
2. POWER LED indicator
3. CLIP LED indicator (Please reduce
the gain to prevent severely clipped
waveforms reaching the loudspeakers)
4. SIGNAL LED indicator (Output level)
5. PROT LED indicator (DC or
output circuit shorted indicator)
6. TEMP LED indicator
(high temperature indicator)
7. Unit’s fan exhaust window
8. Volume (input attenuator)
AMPLIFIER REAR VIEW and CONNECTIONS
1. fan intake window
2. COM. output
3. 4-16 output
4. 70V output
5. 100V output
6. 220V AC fuse
7. XLR input
8. 6.35mm socket input
9. 6.35mm socket link
10. XLR link
11. 220VAC power cord
4SP98Pre-5
m
3
Another Amp.
PROFESSIONAL AMPLIFIER
TO REDUCE THE RISK OF FIRE OR
ELECTRIC SHOCK.DO NOT EXPOSE
THIS EQUIPMENT TO RAIN OR
MOISTURE.
DSPPA Acoustic Technology Co.,Ltd.
为了减少火灾或触电的危险,
不要将设备放在能被雨淋或潮湿的地方。
SER.
NO.
COM
INPUT LINK
AUDIO OUTPUTS
4-16Ω70V
~220 Hz/8A
100V F A
DSPPA
F A
MP2500
F8AL
MP2000
F6AL
MP1500
F10AL
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION!
1 32 4 65
Pre-amp.
MP9811P
Another Amp.
MP series
1110
9
87
or or
Pre-amplifier PB-9811P Another Amplifier

3
OPERATING PRECAUTIONS
1. Make sure the AC mains voltage is correct and is the same as that printed on
the rear of the amplifier. Damage caused by connecting the amplifier to
improper AC voltage is not covered by the three-year US warranty.
2. Make sure the power switch is off before making any input or output
connections. It is always a good idea to have the gain controls turned down
during power-up to prevent speaker damage if there is a high signal level at
the inputs.
3. If the PROT Led goes on steadily while power has been turned on and signal
has been fed, there must a trouble of output shorted. Please turn it off and
correct the trouble then turn it on again.
CONNECTING INPUTS
Input connections are made via either the
3-pin XLR-type connectors (Figure 1 ) or
6.35mm sockets on the rear side of the amplifier.
CONNECTING OUTPUTS
Output terminals are on the rear panel. Load can be connected using banana plugs or
spade lugs. A black binding post is considered “COM”, while the three red binding posts
are considered “hot”.
Usually make use of “fixed voltage” (70V or 100V) output, while the each loudspeaker
should use a separate transformer and the total power of connecting loudspeakers should be
less than rated power of amplifier.
Loudspeaker which close to the amplifier also make use of “fixed resistance” (4Ω)
output, while the total resistance of connecting loudspeakers should accord with 4-16Ω.
Note:
When connecting loudspeakers, it is better to use one pair of output terminals only.
Never connect the “hot” terminals together.
ground signal
1
2
3
Figure 1 3-pin XLR-type connectors

4
SPECIFICATIONS
MODEL PB1500 PB2000 PB2500
Max. Rated Power 350W 450W 650W
Input sensitivity 0dBV
S/N Ratio >80dB
Damping Factor 200:1
Input CMRR greater than 90dB.
Frequency Response 50Hz-15kHz (±3dB)
THD into 4/1kHz <0.3%
Slew Rate >15V/microsecond
Indicators “power”, “clip”, “signal”, “port”, and “temp” LEDs.
Protection Power turn on-turn off,
High temperature, DC voltage & Output Circuit Shorting.
Power Requirement AC220-240V/50-60Hz
Power Consumption 700W 850W 1000W
Outer Packing Size (mm) (L×W×H)530440195
Unit Size (mm) (L×W×H) 48338088
Gross Weight 17kg 19.5kg 20.5kg
Net Weight 14.5kg 17kg 18kg
Specifications are subject to change without notice.
CAUTION
● When the “Power switcher” is off, please pull out the power cord from the socket.
Please keep the equipment out of water.
● To reduce the risk of electric shock, do not remove the cover.
● No user parts inside. Refer servicing to qualified service personnel.
LY International Electronics Co. Ltd.