BZB Gear BG-AMPC40 User manual

BG-AMPC40
40 Watt Power Amplifier
All Rights Reserved
User Manual

40 Watt Power Amplifier
Preface
Read this user manual carefully before using the product. Pictures shown in this
manual are for reference only. Different models and specifications are subject to real
product.
This manual is only for operation instruction, please contact the local distributor for
maintenance assistance. In the constant effort to improve the product, we reserve the
right to make functions or parameters changes without notice or obligation. Please refer
to the dealers for the latest details.
FCC Statement
This equipment generates, uses and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause harmful interference
to radio communications. It has been tested and found to comply with the limits for a
Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed
to provide reasonable protection against harmful interference in a commercial
installation.
Operation of this equipment in a residential area is likely to cause interference, in which
case the user at their own expense will be required to take whatever measures may be
necessary to correct the interference.
Any changes or modifications not expressly approved by the manufacture would void
the user’s authority to operate the equipment.

40 Watt Power Amplifier
SAFETY PRECAUTIONS
To ensur e t h e b e s t from the product, p l e a s e r ead all instruct i o n s c a r efully before usi n g
the device. Save this manual for future reference.
l Unpack the equipment carefully and save the original box and packing material for
possible future shipment.
l Follow basic safety precautions to reduce the risk of fire, electrical shock and injury
to persons.
l Do not dismantle the housing or modify the module. It may result in electrical shock
or burn.
l Using supplies or parts not meeting the specifications of product may cause
damage, deterioration or malfunction.
l Refer all servicing to qualified service personnel.
l To prev e n t f i re or shock hazard, d o n o t e x p o s e the unit to rai n , m o i s ture or install
this product near water.
l Do not put any heavy items on the extension cable in case of extrusion.
l Do not remove the housing of the device as opening or removing housing may
expose you to dangerous voltage or other hazards.
l Install the device in a place with fine ventilation to avoid damage caused by
overheating.
l Keep the module away from liquids.
l Spillage into the housing may result in fire, electrical shock, or equipment damage.
If an object or liquid falls or spills on to the housing, unplug the module immediately.
l Do not twist or pull by force ends of the optical cable. It can cause malfunction.
l Do not use liquid or aerosol cleaners to clean this unit. Always unplug the power to
the device before cleaning.
l Unplug the power cord when left unused for a long period of time.
l Information on disposal for scrapped devices: do not burn or mix with general
household waste, and please treat them as normal electrical wastes.

40 Watt Power Amplifier
Table of Contents
1. Product Introduction .................................................................................................... 1
1.1 Features ............................................................................................................. 1
1.2 Package Contents ............................................................................................. 2
2. Panel Description ........................................................................................................ 2
2.1 Front Panel ........................................................................................................ 2
2.2 Rear Panel ......................................................................................................... 3
3. System Connection ..................................................................................................... 4
3.1 Usage Precautions ............................................................................................ 4
3.2 System Diagram ................................................................................................ 4
3.3 Audio Connection ............................................................................................... 4
3.3.1 Audio Output ............................................................................................ 4
3.3.2 Audio Inputs ............................................................................................. 5
3.4 System Applications ........................................................................................... 6
4. System Operation ....................................................................................................... 7
4.1 Operation of Front Panel ................................................................................... 7
4.1.1 Audio switching ........................................................................................ 7
4.1.2 Volume/EQ controlling ............................................................................. 7
4.2 Operation of IR Remote ..................................................................................... 8
4.3 Operation of Control Software ........................................................................... 9
4.3.1 Connection with Computer ...................................................................... 9
4.3.2 RS232 Control Software .......................................................................... 9
4.3.3 Running Environment ............................................................................ 10
4.3.4 Function Settings ................................................................................... 10
4.3.5 RS232 Communication Commands ....................................................... 11
5. Specifications ............................................................................................................ 13
6. Panel Drawing ........................................................................................................... 14
7. Troubleshooting and Maintenance ............................................................................ 15
8. Tech Support ............................................................................................................. 15
9. Warranty ................................................................................................................... 16
10. Mission Statement .................................................................................................. 16

40 Watt Power Amplifier
1
1. Product Introduction
The BG-AMPC40 is a 40 Watt power amplifier (Class-D) with output alternatively at
70V or 100V. It has 2 stereo inputs (1x3.5mm jack for line in, 2xRCA for L&R), 1 digital
input, and 1 balanced MIC. It is integrated with powerful functions including ducking
function, EQ control, MIC mixer, etc. MIC input supports 3 levels with condenser MIC,
dynamic MIC, and line audio input.
As for power amplifier, we have typical voltages at 70V and 100V for different countries.
The amplifier is designed to integrate with both voltages to meet different requirements.
1.1 Features
l Mono audio output at 40Watt.
l Switchable between 70V and 100V.
l Ducking function.
l 16 ID codes for controlling multiple amplifiers.
l 3-level MIC input, supports condenser microphone, dynamic microphone, and
wireless microphone.
l MIC port can support balance/unbalance signal as well as external noise
suppression.
l Two stereo audio inputs and one digital audio input. Selectable by button, IR
remote, and RS232.
l Volume/Bass/Treble controlled by buttons, IR remote, and RS232.
l Fast switching speed for good performance.
l Convection cooler; fan is not needed.
l LED indicator for power and working status.
l Antistatic case design to provide protection for long-term and stable performance.

40 Watt Power Amplifier
2
1.2 Package Contents
l 1x BG-AMPC40 40 Watt Power Amplifier
l 2x Mounting ears with 4 Screws
l 4x Plastic Cushions
l 2x Pluggable Terminal Blocks
l 1x RS232 Cable
l 1x Power Adapter (DC 24V 2.71A)
l 1x User manual
Note: Please contact your distributor immediately if any damage or defect in the
components is found.
2. Panel Description
2.1 Front Panel
No.
Name
Function
①
Audio Input
Selection
To sel e c t t he i np u t a u d i o so u r c e , after choosing the audio
source, the corresponding LED indicator will be on. No.1 is
for dual mono audio input (2 RCA connectors for L&R), No.2
is for stereo audio input (3.5mm mini jack), and No.3 is for
digital fiber audio input.
②
Audio
Control
Adjust the volume of the MIC, Line, or the level of Bass and
Treble with this button
③
Volume
Adjustment
To t u r n u p / d o w n o r m u t e th e co r r e s po n d i n g au d i o .
▽
: Turn down the volume
△
: Turn up the volume
MUTE: Mute the output
123

40 Watt Power Amplifier
3
2.2 Rear Panel
No.
Name
Function
①
Power
Indicator
Turns red when power on.
②
Microphone
input port
3-pole captive screw connector for microphone input, the dial
switch on the right side is to select the micro input including
48V (for condenser microphone), MIC (for dynamic
microphone), and LINE (for line audio).
③
Audio Inputs
3.5mm mini jack for stereo audio input. It can be connected
with audio source devices (e.g., DVD player).
④
ID Code
16 codes range from 0 to F (hexadecimal). Works together
with the PC control software.
⑤
IR
To connect w i t h th e IR r ec e i v er. Works together with the IR
remote.
⑥
Power Port
To connect w i t h th e po w e r a d a p t er (D C 2 4 V ) .
⑦
L+R RCA
Dual-mono audio input, which can be connected with audio
source device such as a PC.
⑧
Digital Audio
Input
Fiber connector for digital audio input (PCM format only). It
can be connected with a device with fiber port, such as Blu-
ray player.
⑨
RS232
3-pole captive screw connector for serial control. It can be
connected with PC (use a 3-pole captive to 9 pin female D
connector and serial control software) to control the amplifier.
⑩
Audio Output
To connect w i t h au d i o ou t p u t d e v i ce s su c h a s sp e a k e r s ( to
select 70V or 100V depends on the input voltage of the
speakers). COM is for grounding (GND).
678910
12345

40 Watt Power Amplifier
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3. System Connection
3.1 Usage Precautions
l Make sure all components and accessories are included before installation.
l System should be installed in a clean environment with proper temperature and
humidity.
l All of the power switches, plugs, sockets, and power cords should be insulated and
safe.
l All devices should be connected before powering on.
3.2 System Diagram
Figure 3 System Diagram
3.3 Audio Connection
3.3.1 Audio Output
The amplifier supports mono audio output, and the output voltage is 70V or alterative
100V. With its dual-purpose design, it can be applied in different areas. The end COM
is for grounding. The amplifier outputs a mono audio signal with a rated power at 40
Watts and can be connected with several speakers in parallel wiring. Total p o w e r must
MIC
PC 1
Blu-ray
DVD
Speaker
Speaker
Speaker
Speaker
PC
(100V/10W)
(100V/10W)
(100V/10W)
(100V/10W)
IR Remote
IR Receiver

40 Watt Power Amplifier
5
not be more than 40Watt.
The following figure shows how to connect with the speakers. Here we take the
100V/10W speakers for each as example.
Figure 4 Audio Output Connection
3.3.2 Audio Inputs
The amplifier provides 2 stereo audio inputs: one microphone input and one digital fiber
audio input. The following figure shows the audio input ports.
Figure 5 Audio Input Ports
Ø 48V phantom power input
When the switch turns to “48V” (it has high input impedance and high sensitivity in this
mode), the MIC input will provide a 48V phantom power. This is usually used for
powering condenser microphones. Connection is: “+” connects to positive, “-” connects
to negative, and “ ” to ground.
Note: In this mode, only condenser microphones can be connected.
COM 70V 100V
Speaker Speaker Speaker Speaker
(100V/10W)
(100V/10W)
(100V/10W)
(100V/10W)
Switch to select the MIC input mode,
includes MIC (dynamic microphone), 48V
(condenser microphone), and LINE
(normal audio or wireless microphone).

40 Watt Power Amplifier
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Ø MIC input
When the switch turns to “MIC” (it has wide frequency response in this mode), the
microphone input is used for connecting dynamic microphones. There are two different
connections:
a) Unbalanced connection:
“+” and “” connect to ground and “-” connects to signal.
“-” and “” connect to ground and “+” connects to signal.
b) Balanced connection: “+” connects to positive, “-” connects to negative, and “ ”
connects to ground.
Ø LINE input
When the switch turns to “LINE” (it has wide frequency response in this mode), the
microphone input is used for connecting normal audio or wireless microphone outputs.
There are two different connections:
a) Unbalanced connection:
“+” and “” connect to ground and “-” connects to signal.
“-” and “” connect to ground and “+” connects to signal.
b) Balanced connection: “+” connects to positive, “-” connects to negative, and “ ”
connects to ground.
Ø Digital Audio Input
The amplifier features a TOSLINK input to connect with digital audio source device.
With this connection the audio signal can be transmitted more reliably and can be
transmitted over a long distance without distortion.
Note: This digital audio input can support/decode PCM format signal only.
3.4 System Applications
The amplifier can be applied in different settings such as classrooms, small meeting
rooms, lecture halls, bars, and hotels.