LY International Electronics PB-220PII User manual

1
PA SERIES
Mixing Classroom Amplifier PB-220PII
O W N E R ’ S M AN U AL
Before operating, please read this manual carefully.
FEATURES
 Small-sized amplifier with built-in MIC, suitable for broadcasting on the sites such as
classroom, meeting room, and hall.
 Flush-mount wall installation.
 Priority input function, switching on the closed amplifier when emergency power signal input.
 2 MIC inputs, 2 AUX inputs.
 100V priority signal input.
 Individual volume control for input channels.
 Treble and Bass control.
 Overheating and short circuit protection.

2
FRONT PANEL (view without turnover cover)
1. Spare MIC
2. Power Indicator
3. Bass Control Button
4. LED Meter
5. Treble Control Button
6. MIC 1 Volume Control
7. MIC 2 Volume Control 19
8. Line Input Volume Control 20
9. AUX.1 Volume Control 21
10. AUX.2 Volume Control 22
11. Power Switch23
REAR and SIDE PANEL
1. Nail Hole for Hanging 2. Fuse 3. 24V Priority Input Terminal
4. Output Terminal 5. AC220V Power Line. 6. 100V Priority Signal Input Jack
7. MIC 1 & 2 Input Jack 8. Aux.1 & 2 Input Jack
1
2
3
4
5
6
7
8
9
10
11
1
2
3
4
5
6
7
8

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CONNECTIONS
OPERATION AND NOTICE
 Connecting with MP9820 Switching Power，this amplifier on off status can be switched on
when DC24V Priority Power input. It can accept the 100V Priority Audio signal from the
Control Station, which overrides the MIC and AUX input signal. The effect of this muting
function will be decided by the100V signal’s intensity, not by its volume.
 The Spare MIC on front panel is the standby MIC of MIC 1. Its volume can be adjusted by
the volume control of MIC 1.
 The turnover cover can be opened by an accessory key. 1~2 microphone can be put inside.
 The total load power should be less than the rated power of this amplifier for its protection
and safety.
 All the wire should be in good condition.
 Don’t put this unit in the wet, unventilated, overheating environment or at the place near to
the heat source.
STEPS of WALL HANGING
1. Stick two nails on the wall.
(Their positions should refer to
the two nail hole of the amplifier.)
2. Connect all wires with the amplifier,
then hang it on the nails.
To PB9820S
Switching Power
（optional） Mic.1
100V priority
signal from the
control station
（optional）
Aux input 1
Mic.2
Aux input 2
To Speaker
Nail hole
N
ail hole 3
Nail hole
2
Notice：All COM terminals are ground; the polarities of them can’t be connected by contraries
while connection.
Guard against
theft hole

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SPECIFICATIONS
Rated output 20W（4Ω load）
Output Mode 4～8Ω rated output
MIC 1，2: ≥3 mV, unbalanced
AUX1，2: 10 kΩ, ≥350 mV, unbalanced
Input Sensitivity
LINE IN：≥30V，
Priority Power
Source
DC 24±2V
LINE IN, MIC: 150 Hz ~ 15 kHz
Frequency
response AUX: 20 Hz ~ 20 kHz
Distortion < 0.5% at 1 kHz , 1 / 3 rated power
Mic 1，2 : ≤5 mV
The ratio of
Signal to Noise AUX1，2 : ≤3 mV
BASS: ±10 dB at 100 Hz
Tone TREBLE: ±10 dB at 10 kHz
Capability of fuse
AC FUSE（F1A）×1
Power
Requirements
AC 198~242 V / 50 ~ 60 Hz
Power
Consumption
40W
Dimensions 250×220×80 mm3
Gross weight /
Net weight
2kg /1.2kg
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.
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