LY International Electronics P.B. Series User manual

1
OWNER’S MANUAL
Before operating, please read this manual completely.
P.B. SERIES
Powerful Public
Address Amplifiers
PB6002
PB7002
PB8002
FEATURES
1 Transformer isolated 100V, 70V and 4 Ohms speaker outputs.
2 5 LED indicator for status display.
3 XLR socket and 6.3mm jack for link convenient .
4 Output short- circuit protection & display.
5 Various models of very powerful output available.

2
AMPLIFIER FRONT VIEW
1. AC power switch(power indicator lighting
as ON state)
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. Volume (input attenuator)
8. Unit’s fan exhaust window
AMPLIFIER REAR VIEW AND CONNECTIONS
1. fan intake window
2. 100V output
3. 70V output
4. 4-16 output
5. COM. output
6. AC( low voltage ) fuse
7. XLR input
8. 6.3mm socket input
9. 6.3mm socket link
10. XLR link
11. 220VAC power cord
1 2 3 4 5 6 7 8
1 2 3 4 5 , 6
7 8 9 10 11
Pre-amp.
PB2181P
Another Amp.
PB-series
or
or

3
OPERATING PRECAUTIONS
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. 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.
CONNECTING INPUTS
Input connections are made via either the 3-pin
XLR-type connectors (Figure1) or 6.3mm sockets
on the rear side of the amplifier.
CONNECTING OUTPUTS
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”, and the voltage is 38V（different
from the model）, 70V, and 100V.
Note:
Never connect the“hot”terminals together.
When connecting load（speakers）, it is better to use one pair of output terminals only.
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.
ground signal
1
2
3
Figure 1 3-pin XLR-type connectors

4
SPECIFICATIONS
MODEL
PB6002 PB7002 PB8002
Max. Rated Power 1000W 1500W 2000W
Input sensitivity 1.2V
S/N Ratio More than 90dB
Damping Factor 200:1
Input CMRR More than 90dB
Frequency Response 80Hz-15kHz ±3dB
THD into 4/1kHz <0.3%
Slew Rate >15V/microsecond
Cooling 220V AC Fan.
Indicators “power”, “clip”, “signal”, “prot”, and
“temp” LEDs.
Protection Power turn on-turn off,
High temperature, DC voltage & O
utput
Circuit Shorting.
Power Requirement AC220-240V / 50-60Hz
Power Consumption 1800W 2600W 3500W
Dimensions 132483480mm
Gross Weight 34.5kg 40.5kg 42kg
Net Weight 31kg 37kg 38.5kg
Specifications are subject to change without notice.
CAUTION
● Do not put the vase full of water and similar things on the machine.
● Please pull out the plug from the outlet when the machine is OFF state.
● To reduce the risk of electric shock, do not remove the unit’s cover.
No user parts are inside. For services, refer to a qualified service person.
LY INTERNATIONAL ELECTRONICS CO. LTD