Better Music Builder VM-92U User manual

®
Professional UHF Wireless Microphone System
VM-92U
Operating Instructions
Passionate about Music
www.BetterMusicBuilder.com
Thank you for purchasing this unit. To
make full and effective use of this unit,
please read this Owner's Manual
carefully before operating it. Please
retain this manual for future reference.
KARAOKE
POWER
AF RF
CH01:752.20 mh z
RE CE IV ER - B L CD
64 SELECTABLE WIRELESS SYSTEM
AF RF
CH01:763.20 mh z
UP
DOW N
VOLUME
MIN MAX
UP
DOW N
VOLUME
MIN MAX
Better Music Builder
®
UHF DUAL CHANNEL RECEIVER VM-92U
RE CE IV ER - B L CDRE CE IV ER - A L CD
UHF
UHF MIC WIRELESS SYSTEM VM-92U
Better Music Builder
®
24
8 13.10
CH MHZ
32 CHANNEL SELECTABLE
UHF
Frequency
Selectable
64

CONTENTS
INTRODUCTION...............................................................................2
RECEIVER SPECIFICATION..................................................................3
THE SYSTEM INCLUDES THE FOLLOWING PARTS................................. 4
SETTING UP YOUR RECEIVER..............................................................4
RECEIVER LCD PANEL DESCRIPTION.................................................... 5
HOW TO SELECT FREQUENCIES?...................................................... 5
HOW TO ADJUST RECEIVER SETTINGS................................................6
HOW TO CONNECT AUDIO OUT.....................................................7
DC-POWER CONNECTION...............................................................8
HANDHELD TRANSMITTER DESCRIPTION............................................. 9
HAND-HELD TRANSMITTER LCD PANEL DESCRIPTION..........................10
HOW TO INSERT HAND-HELD TRANSMITTER’S BATTERIES................... 11
HOW TO SET UP HAND-HELD TRANSMITTER..................................... 12
TECHNICAL SPECIFICATION............................................................ 13
VM-92U FCC FREQUENCY 750 MHz and 800 MHz............... 14
FREQUENCY SCAN GROUPS FOR BAND C & BAND D.......................15
US UHF WIRELESS OPERATING FREQUENCIES............................. 16~17
TROUBLESHOOTING...................................................................... 18
WARRANTY & PRECAUTION............................................................ 19
INTRODUCTION
Professional UHF Wireless Microphone is the third generation of UHF wireless
microphone designed by the engineering team of Better Music Builder.
Better Music Builder VM-92U wireless microphone is a design for high value
with one receiver and two hand-held microphones whose cone was made of
aluminum. Each microphone has 32 built-in UHF frequencies for selection. The
receiver has a LCD screen in the panel, so you can look up the detailed
information from it. The audio out has a XLR balanced for each channel and also
has unbalanced mixed channels out.
SYSTEM CHARACTERISTICS
1. Equipped with the latest wireless technology and UHF dual-channel with one
receiver to picks up weak signals and prevents signal interference.
2. Clear LCD screen that can allow you to check AF (Audio Frequency) and RF
(Radio Frequency) signal levels.
3. One receiver has two built-in units (Receiver A and Receiver B).
4. Easy to select channels with pre-set frequencies.
5. Each microphone has 32 channels. There are a total of 64 frequencies in
two microphones.
6. Easy and convenient mounting for portable rack.
7. Adjustable antennas for different angles to receive better signals.
2

RISK OF ELECTRIC SHOCK
DO NOT OPEN
Taking apart or modifying the
receiver may lead to electric shock,
fire, or damage to the receiver and
will void your warranty.
DC-POWER
DC 14~16V 600mA
UNBALANCED
Receiver A & B
MIXED OUTPUT
0 36120071023-92 3
ANTENNA-B ANTENNA-A
Model No. VM-92U (UHF Microphone)
CALIFORNIA, UNITED STATES OF AMERICA
COMMENTS? E-MAIL: [email protected]
www.BetterMusicBuilder.com
ENGINEERED AND DESIGN IN U.S.A.
FCC: 74.861
SERIAL NO.
Better Music Builder
®
Channel B Channel A
UHF
POWER
Better Music Builder
®
64 SELECTABLE WIRELESS SYSTEM
UP
DOW N
AF RF
CH01:763.20 mhz
DUAL CHANNEL RECEIVER VM-92U
UP
DOW N
AF RF
CH01:752.20 mhz
RECEIVER - A LCD VOLUME
MIN MAX
RECEIVER - B LCD VOLUME
MIN MAXMIN MAX
21 43
13121110 14 15
5 6 87 9
3
RECEIVER SPECIFICATION
A. NAMES & FUNCTION:
Front Panel:
1. Power button On/Off.
2. Receiver A LCD screen: Channel A with 32 Built-In Channels with
different UHF frequencies.
3. “ ▼ ” DOWN button selects different frequency & model settings (Receiver A)
4. “ ▲ ” UP button selects different frequency & model settings (Receiver A)
5. Volume control (Receiver A)
6. Receiver B LCD screen: Channel A with 32 Built-In Channels with
different UHF frequencies.
7. “ ▼ ” DOWN button selects different frequency & model settings (Receiver B)
8. “ ▲ ” UP button selects different frequency & model settings (Receiver B)
9. Volume control (Receiver B)
Rear Panel:
10. Receiver Antenna Input-B. (Receiver B) BNC Socket.
11. Channel B XLR 3M socket balanced audio output 50Hz~15kHz +/-3dB.
12. Receiver A & B 1/4-inch (6.3 mm) jack socket unbalanced audio output,
mixed channel A & B.
13. Channel A XLR balanced audio output 50Hz~15kHz +/-3dB.
14. Power supply dock with removable IEC cable 14~16V 600mA.
15. Receiver Antenna Input-A. (Receiver A) BNC Socket.

4
ANTENNA-B
THE SYSTEM INCLUDES THE FOLLOWING PARTS
The package comes with one receiver, two transmitters, one DC power adaptor,
one audio cable, two 9V batteries, and two antennas.
SETTING UP YOUR RECEIVER
1.Screw the antennas (BNC socket) into the rear panel of the receiver in a
vertical 90° angle and turn it in clockwise to lock it.
You can adjust the antennas to angle differently for adjusting signal strengths.
2.Insert the DC adaptor into the power socket of the rear panel the power supply
must comply the requirement of the system.
3.To turn on, turn Volume to the minimum. After turning on the “POWER” button,
“PRO-MIC” would immediately appear in the LCD screen. Then, it takes about
five seconds for ready to use.
4.Adjust the settings to your liking (See the description for the LCD or control
panel).
5.To turn off, press and hold the power button until the power light turn off. Then
power will automatically shut off.
DC Power
Adaptor: 1 Unit
Audio Cable (for mixed out): 1 Unit 9V Battery: 2 Units
9 V
ALKALINE
BATTERY
9 V
ALKALINE
BATTERY
UHF
POWER
Better Music Builder
®
64 SELECTABLE WIRELESS SYSTEM
UP
DOW N
AF RF
CH01:763.20 mhz
DUAL CHANNEL RECEIVER VM-92U
UP
DOW N
AF RF
CH01:752.20 mhz
RECEIVER - A LCD VOLUME
MIN MAX
RECEIVER - B LCD VOLUME
MIN MAXMIN MAX
Receiver: 1 Set
Receiving
Antenna:
2 Units
8.43 inches
21.4 cm
Hand-held Transmitter: 2 Set
32 CHANNEL SELECTABLE
UHF
UHF MIC WIRELESS SYSTEM VM-92U
Better Music Builder
®

5
RECEIVER LCD PANEL DESCRIPTION
After turning on the “POWER” button, LCD screen will light up as below:
1. RF (radio frequency) Indicator
2. AF (audio frequency) Indicator
3. Current Channel/Frequency Display: current value depends on your setting.
If there is static or no sound coming out of your speakers, than
there may be a frequency interruption from another system, change your
frequency to match your transmitter’s (microphone) frequency.
HOW TO SELECT FREQUENCIES?
The manufacturer has already pre-set a particular frequency for each channel.
To select the frequency, you can use either Receiver A or Receiver B and press
the upper button for selection. Selection for frequency at either Receiver A or
Receiver B will work.
NOTE
2
1
3
AF RF
CH01:752.20 mh z
AF RF
CH01:763.20 mh z
RECEIVER - B LCD
AF RF
CH01:752.20 mh z
RECEIVER - A LCD

6
HOW TO ADJUST RECEIVER SETTINGS
To adjust your receiver’s channel/frequency by pressing the “ ▲ ” UP or “ ▼
” DOWN button to select your frequency.
Turn “VOLUME” button to adjust your vocal volume.
We recommend setting the volume to the maximum, then control it from
the mixer.
If you or anyone do any damage on any part of the receiver either
accidentally or intentionally, we have the right to void your warranty.
NOTE
NOTE
UHF DUAL CHANNEL RECEIVER VM-92U
UP
DOWN
AF RF
CH08:758.30 mh z
RECEIVER - A LCD VOLUME
MIN MAXMIN MAX
UHF DUAL CHANNEL RECEIVER VM-92U
UP
DOWN
AF RF
CH08:758.30 mh z
RECEIVER - A LCD VOLUME
MIN MAXMIN MAX
UHF DUAL CHANNEL RECEIVER VM-92U
UP
DOWN
AF RF
CH08:758.30 mh z
RECEIVER - A LCD VOLUME
MIN MAXMIN MAX

RISK OF ELECTRIC SHOCK
DO NOT OPEN
Taking apart or modifying the
receiver may lead to electric shock,
fire, or damage to the receiver and
will void your warranty.
DC-POWER
DC 14~16V 600mA
UNBALANCED
Receiver A & B
MIXED OUTPUT
0
36120071023-92
3
Model No. VM-92U (UHF Microphone)
CALIFORNIA, UNITED STATES OF AMERICA
COMMENTS? E-MAIL: [email protected]
www.BetterMusicBuilder.com
ENGINEERED AND DESIGN IN U.S.A.
FCC: 74.861
SERIAL NO.
Better Music Builder
®
Channel B Channel A
ANTENNA-B ANTENNA-A
RISK OF ELECTRIC SHOCK
DO NOT OPEN
Taking apart or modifying the
receiver may lead to electric shock,
fire, or damage to the receiver and
will void your warranty.
DC-POWER
DC 14~16V 600mA
UNBALANCED
Receiver A & B
MIXED OUTPUT
0
36120071023-92
3
Model No. VM-92U (UHF Microphone)
CALIFORNIA, UNITED STATES OF AMERICA
COMMENTS? E-MAIL: [email protected]
www.BetterMusicBuilder.com
ENGINEERED AND DESIGN IN U.S.A.
FCC: 74.861
SERIAL NO.
Better Music Builder
®
Channel B Channel A
ANTENNA-B ANTENNA-A
7
HOW TO CONNECT AUDIO OUT
There are three different connectors as shown in the following diagram:
• Connector 1 is a channel B XLR-balanced audio out
• Connector 2 is a mixed audio output (Channel A and Channel B)
• Connector 3 is a channel A XLR-balanced audio out
Connector 1 (Channel B) is a balanced XLR audio signal. If you connect B to the
mixer or amplifier, then you can control the microphone effect on MIC. B only.
Connector 2 is an unbalanced 1/4 audio signal. If you connect to Connect 2
(1/4), both MIC. A and MIC. B will mix together to produce the same signal. If
you want to produce different effects on MIC. A and MIC. B, you need to
connect to XLR (Connector 1), which is equivalent to channel B, and XLR
(Connector 3), which is equivalent to channel A. You can also adjust different
echo or mic. tone effects on each microphone (i.e. MIC. A and MIC. B).
Connector 3 (Channel A) is a balanced XLR audio signal. If you connect A to the
mixer or amplifier, then you can control the microphone effect on MIC. A only.
UHF WIRELESS SYSTEM DIAGRAM
Audio Mixer Amplifier or a Karaoke Unit Input terminal
XLR
Balance Input
XLR
Balance Input
XLR
Balance Input
XLR
Balance Input
1/4"
Unbalance Input
1/4"
Unbalance Input
1/4"
Unbalance Input 1/4"
Unbalance Input
Rear View
NOTE
Channel A Hand-held Transmitter
32 CHANNEL SELECTABLE
Channel B Hand-held Transmitter
32 CHANNEL SELECTABLE
Connector 1
(XLR Balanced)
1Connector 2
(Mixed A & B)
2Connector 3
(XLR Balanced)
3
Balance Connection

RISK OF ELECTRIC SHOCK
DO NOT OPEN
Taking apart or modifying the
receiver may lead to electric shock,
fire, or damage to the receiver and
will void your warranty.
DC-POWER
DC 14~16V 600mA
UNBALANCED
Receiver A & B
MIXED OUTPUT
0 36120071023-92 3
Model No. VM-92U (UHF Microphone)
CALIFORNIA, UNITED STATES OF AMERICA
COMMENTS? E-MAIL: [email protected]
www.BetterMusicBuilder.com
ENGINEERED AND DESIGN IN U.S.A.
FCC: 74.861
SERIAL NO.
Better Music Builder
®
Channel B Channel A
ANTENNA-B ANTENNA-A
8
DC-POWER CONNECTION
If you use 220V to 240V, you must make sure to use a right adaptor,
otherwise, it would damage your system. Our warranty does not cover this.
OPTIONAL: 19” RACK MOUNT KIT
If you want to put the system onto a mount-kit, please follow the below
diagram. Our design has this special feature to allow it to mount on a DJ rack.
It is removable.
Rear View
120V DC 14~16V 600mA adaptor
NOTE
19 inches
7 inches
13.8 inches
Antenna is adjustable.
POWER
AF RF
CH01:752.20 mh z
REC EI VE R - B LCD
64 SELECTABLE WIRELESS SYSTEM
AF RF
CH01:763.20 mh z
UP
DOWN
VOLUME
MIN M AX
UP
DOWN
VOLUME
MIN M AX
Better Music Builder
®
UHF DUAL CHANNEL RECEIVER VM-92U
REC EI VE R - B LCDREC EI VE R - A LCD
Rack mount kit is not included.

32 CHANNEL SELECTABLE
9
HAND-HELD TRANSMITTER (Wireless Mic.) DESCRIPTION
NAMES & FUNCTION:
Uncover Looking of the Handheld Transmitter:
1. Condenser and grille.
2. LCD digital display.
3. “ ▲ ” or “ ▼ ” buttons: Adjustment buttons to select Channel/Frequency.
4. Battery dock: insert 1x9V battery or rechargeable battery into the battery slot,
putting battery’s polarity on different ends may damage system and your
warranty may be terminated if damage does occur because of it.
5. Power switch: To turn on press and hold the power button located on the
bottom cap of the transmitter for 2-3 seconds, until the LCD screen is on. To
turn off press and hold the power button until LCD screen is off.
5
POWER
4
9 V
ALKALINE
BATTERY
321
32 CHANNEL SELECTABLE

10
01
806.20
CH MHZ
HAND-HELD TRANSMITTER LCD PANEL DESCRIPTION
After turning on the “POWER” button, LCD screen will light up as below:
1. Display Channel/Frequency: Current value depends on your setting.
2. “ ▲ ” or “ ▼ ” buttons: Adjustment buttons to select Channel/Frequency.
3. Battery Status: Indicates charge remaining in transmitter batteries.
BATTERY STATUS
INTERCHANGEABLE MICROPHONE HEAD
12
3
You can order the replacement parts (such as
the microphone head as shown in the above
figure) from any of our authorized dealers.
NOTE
Interchangeable
microphone head
2
1
Indicates a full battery on the transmitter.
Indicates a low battery on the transmitter. When it
shows a low battery as shown on the left, you need
to change the battery or recharge the battery
immediately.
Full Battery
Low Battery
01
806.20
CH MHZ
01
806.20
CH MHZ
32 CHANNEL SELECTABLE

11
HOW TO INSERT HAND-HELD TRANSMITTER’S BATTERIES
1. Twist open battery cover. Use one hand to hold onto the top of your
transmitter, use the other hand to twist out your transmitter’s handle.
2. Use one hand to hold onto the top of your transmitter, with your other
hand slide one 9V battery into battery slot. Be careful not to drop
transmitter while inserting battery.
Make sure that you insert the battery at the right electric poles, as shown in
picture.
3. Twist back battery cover.
9 V
ALKALINE
BATTERY
32 CHANNEL SELECTABLE
32 CHANNEL SELECTABLE
9 V
ALKALINE
BATTERY
32 CHANNEL SELECTABLE
32 CHANNEL SELECTABLE

12
POWER
HOW TO TURN ON AND OFF HAND-HELD TRANSMITTER
Press and hold power button to turn on/off your transmitter. When on
transmitter’s LCD screen will have display, when off transmitter’s LCD screen
will be off.
Press Power button to select display options as follows:
• Display Channel/Frequency
HOW TO CHANGE HAND-HELD TRANSMITTER SETTINGS
Selecting Transmitter’s Channel/Frequency
1. Press the “ ▲ ” UP & “ ▼ ” DOWN buttons to select
Channel/Frequency.
2. 32-selectable channels/frequencies for high
communication efficiency.
3. Please make sure to match the same
channel/frequency as that of the receiver.
After pressing the button for three seconds, the transmitter should turn on.
If the transmitter is still off, please check the battery. It may very low.
You need to change the battery or recharge it immediately.
NOTE
Please use ball pen to
select the frequencies. Do
not use screw driver. If
the selector is damaged
with improper use,
warranty will be voided
automatically.
NOTE
32 CHANNEL SELECTABLE

13
TECHNICAL SPECIFICATION
A. SYSTEM FEATURE:
1. Channel: 64
2. Frequency Range: 780MHz~850MHz (Selectable)
3. Frequency Stabilization: < ±30ppm
4. Dynamic Range: More than 90dB
5. Total Harmonic Distortion: Less than 0.5%
6. Audio Frequency Response: 40Hz~15KHz ±3dB
7. Audio Output Level: Balance Output: 0~±400mV
Unbalance Output: 0~±200mV
8. Receiver Dimensions (WxHxD): 13.8x1.8x7.2 (inches)/35x4.5x18.3 (cm)
9. Handheld Transmitter Dimensions (WxH): 1.97x10 (inches)/5x25.5 (cm)
10. Net Weight: 6.6 lbs / 3.1 kg
11. Shipping Weight: 7.6 lbs / 3.4 kg
B. TECHNOLOGICAL FEATURE OF THE TRANSMITTER:
1. Transmitter Power: 8.5mW
2. Max Deviation: ±25KHz
3. Adjustment Mode: FM, F3F
4. Spurious Emission: > 40dB (with carrier)
5. Continuous Using: 6 hour (GP) 1604s 9V battery
6. Battery: 9V Battery
7. Noise Control: perfectness circuit for eliminating noises
C. TECHNOLOGICAL FEATURE OF THE RECEIVER:
1. Signal/Noise Ratio: More than 90dB
2. Image & Spurious Rejection: More than 80dB
3. Border Upon Channel Rejection: More than 80dB
4. Receiving Sensitivity: Less than 10dBuV
5. DE-Emphasis: 50us
6. DC-Power: 14~16V DC
7. Work Current: 600mA
THIS SYSTEM INCLUDES THE FOLLOWING
Receiver: 1 Set
Handheld Transmitter: 2 Sets
9V Battery: 2 Units
Antenna: 2 Units
DC-Power adaptor: 1 Unit
Audio Connecting Cable: 1 Unit
Instructional Manual: 1 PC

14
VM-92U FCC FREQUENCY 750 MHz and 800 MHz
Receiver A
Frequency
752.200 MHz
752.500 MHz
752.800 MHz
753.100 MHz
753.400 MHz
753.700 MHz
754.000 MHz
754.300 MHz
754.600 MHz
754.900 MHz
755.200 MHz
755.500 MHz
755.800 MHz
756.100 MHz
756.400 MHz
756.700 MHz
757.000 MHz
757.300 MHz
757.600 MHz
757.900 MHz
758.200 MHz
758.500 MHz
758.800 MHz
759.100 MHz
759.400 MHz
759.700 MHz
760.000 MHz
760.300 MHz
760.600 MHz
760.900 MHz
761.200 MHz
761.500 MHz
Channel
Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
Receiver B
Frequency
775.200 MHz
775.500 MHz
775.800 MHz
776.100 MHz
776.400 MHz
776.700 MHz
777.000 MHz
777.300 MHz
777.600 MHz
777.900 MHz
778.200 MHz
778.500 MHz
778.800 MHz
779.100 MHz
779.400 MHz
779.700 MHz
780.000 MHz
780.300 MHz
780.600 MHz
780.900 MHz
781.200 MHz
781.500 MHz
781.800 MHz
782.100 MHz
782.400 MHz
782.700 MHz
783.000 MHz
783.300 MHz
783.600 MHz
783.900 MHz
784.200 MHz
784.500 MHz
Receiver A
Frequency
763.200 MHz
763.500 MHz
763.800 MHz
764.100 MHz
764.400 MHz
764.700 MHz
765.000 MHz
765.300 MHz
765.600 MHz
765.900 MHz
766.200 MHz
766.500 MHz
766.800 MHz
767.100 MHz
767.400 MHz
767.700 MHz
768.000 MHz
768.300 MHz
768.600 MHz
768.900 MHz
769.200 MHz
769.500 MHz
769.800 MHz
770.100 MHz
770.400 MHz
770.700 MHz
771.000 MHz
771.300 MHz
771.600 MHz
771.900 MHz
772.200 MHz
772.500 MHz
Channel
Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
Receiver B
Frequency
787.200 MHz
787.500 MHz
787.800 MHz
788.100 MHz
788.400 MHz
788.700 MHz
789.000 MHz
789.300 MHz
789.600 MHz
789.900 MHz
790.200 MHz
790.500 MHz
790.800 MHz
791.100 MHz
791.400 MHz
791.700 MHz
792.000 MHz
792.300 MHz
792.600 MHz
792.900 MHz
793.200 MHz
793.500 MHz
793.800 MHz
794.100 MHz
794.400 MHz
794.700 MHz
795.000 MHz
795.300 MHz
795.600 MHz
795.900 MHz
796.200 MHz
796.500 MHz
Group A Group B

15
Band C
Band C Scan Group 1 Band C Scan Group 2 Band C Scan Group 3
TV Ch. Frequency – MHz * TV Ch. Frequency – MHz * TV Ch. Frequency – MHz *
25 (None) 0 25 541.500 1 25 541.500 1
26 542.750 26 542.750 26 542.125
26 545.500 26 544.375 26 543.500
26 547.125 26 544.750 26 544.000
26 547.375 4 26 545.750 26 546.250 4
27 549.750 26 547.500 5 27 548.250
27 550.375 27 (None) 0 27 549.750 2
27 550.625 3 28 554.250 28 555.750
28 557.250 28 556.125 28 556.625
28 557.500 28 557.500 28 558.250
28 559.250 28 559.375 4 28 559.375 4
28 559.500 4 29 560.000 29 560.125
29 562.000 29 561.875 29 561.500
29 563.375 29 562.250 29 564.000
29 563.625 3 29 563.250 29 564.250 4
30 566.000 29 565.500 5 30 566.125 1
30 566.250 2 30 566.000 1
Band D
Band D Scan Group 1 Band D Scan Group 2 Band D Scan Group 3
TV Ch. Frequency – MHz * TV Ch. Frequency – MHz * TV Ch. Frequency – MHz *
44 655.500 1 44 655.875 1 44 655.500
45 658.000 45 656.250 44 655.750 2
45 658.375 45 658.500 45 656.625
45 659.250 45 659.750 45 658.500
45 659.500 45 660.000 45 658.750
45 661.500 5 45 660.500 5 45 659.500 4
46 662.375 46 664.375 46 662.750
46 662.750 2 46 665.500 2 46 665.250 2
47 669.625 47 671.625 47 671.250
47 671.750 2 47 672.000 2 47 672.375
48 674.750 48 674.000 47 673.125 3
48 675.750 48 674.500 48 674.125
48 676.125 48 675.750 48 674.500
48 678.000 48 676.750 48 675.375
48 678.250 48 678.250 5 48 678.625
48 679.500 6 49 680.250 1 48 679.125 5
49 (None) 0 49 (None) 0
* Number of wireless frequencies in TV Channel.
FREQUENCY SCAN GROUPS FOR BAND C & BAND D

16
Band C: 541.500 - 566.375 MHz
TV Ch.
25 --- --- --- --- 541.500 541.625 541.750 541.875
26 542.000 542.125 542.250 542.375 542.500 542.625 542.750 542.875
26 543.000 543.125 543.250 543.375 543.500 543.625 543.750 543.875
26 544.000 544.125 544.250 544.375 544.500 544.625 544.750 544.875
26 545.000 545.125 545.250 545.375 545.500 545.625 545.750 545.875
26 546.000 546.125 546.250 546.375 546.500 546.625 546.750 546.875
26 547.000 547.125 547.250 547.375 547.500 547.625 547.750 547.875
27 548.000 548.125 548.250 548.375 548.500 548.625 548.750 548.875
27 549.000 549.125 549.250 549.375 549.500 549.625 549.750 549.875
27 550.000 550.125 550.250 550.375 550.500 550.625 550.750 550.875
27 551.000 551.125 551.250 551.375 551.500 551.625 551.750 551.875
27 552.000 552.125 552.250 552.375 552.500 552.625 552.750 552.875
27 553.000 553.125 553.250 553.375 553.500 553.625 553.750 553.875
28 554.000 554.125 554.250 554.375 554.500 554.625 554.750 554.875
28 555.000 555.125 555.250 555.375 555.500 555.625 555.750 555.875
28 556.000 556.125 556.250 556.375 556.500 556.625 556.750 556.875
28 557.000 557.125 557.250 557.375 557.500 557.625 557.750 557.875
28 558.000 558.125 558.250 558.375 558.500 558.625 558.750 558.875
28 559.000 559.125 559.250 559.375 559.500 559.625 559.750 559.875
29 560.000 560.125 560.250 560.375 560.500 560.625 560.750 560.875
29 561.000 561.125 561.250 561.375 561.500 561.625 561.750 561.875
29 562.000 562.125 562.250 562.375 562.500 562.62 5562.750 562.875
29 563.000 563.125 563.250 563.375 563.500 563.625 563.750 563.875
29 564.000 564.125 564.250 564.375 564.500 564.625 564.750 564.875
29 565.000 565.125 565.250 565.375 565.500 565.625 565.750 565.875
30 566.000 566.125 566.250 566.375 --- --- --- ---
US UHF WIRELESS OPERATING FREQUENCIES
Avoid using same frequencies as TV channels or other radio signals for better performance.

17
Band D: 655.500 - 680.375 MHz
TV Ch.
44 --- --- --- --- 655.500 655.625 655.750 655.875
45 656.000 656.125 656.250 656.375 656.500 656.625 656.750 656.875
45 657.000 657.125 657.250 657.375 657.500 657.625 657.750 657.875
45 658.000 658.125 658.250 658.375 658.500 658.625 658.750 658.875
45 659.000 659.125 659.250 659.375 659.500 659.625 659.750 659.875
45 660.000 660.125 660.250 660.375 660.500 660.625 660.750 660.875
45 661.000 661.125 661.250 661.375 661.500 661.625 661.750 661.875
46 662.000 662.125 662.250 662.375 662.500 662.625 662.750 662.875
46 663.000 663.125 663.250 663.375 663.500 663.625 663.750 663.875
46 664.000 664.125 664.250 664.375 664.500 664.625 664.750 664.875
46 665.000 665.125 665.250 665.375 665.500 665.625 665.750 665.875
46 666.000 666.125 666.250 666.375 666.500 666.625 666.750 666.875
46 667.000 667.125 667.250 667.375 667.500 667.625 667.750 667.875
47 668.000 668.125 668.250 668.375 668.500 668.625 668.750 668.875
47 669.000 669.125 669.250 669.375 669.500 669.625 669.750 669.875
47 670.000 670.125 670.250 670.375 670.500 670.625 670.750 670.875
47 671.000 671.125 671.250 671.375 671.500 671.625 671.750 671.875
47 672.000 672.125 672.250 672.375 672.500 672.625 672.750 672.875
47 673.000 673.125 673.250 673.375 673.500 673.625 673.750 673.875
48 674.000 674.125 674.250 674.375 674.500 674.625 674.750 674.875
48 675.000 675.125 675.250 675.375 675.500 675.625 675.750 675.875
48 676.000 676.125 676.250 676.375 676.500 676.625 676.750 676.875
48 677.000 677.125 677.250 677.375 677.500 677.625 677.750 677.875
48 678.000 678.125 678.250 678.375 678.500 678.625 678.750 678.875
48 679.000 679.125 679.250 679.375 679.500 679.625 679.750 679.875
49 680.000 680.125 680.250 680.375 --- --- --- ---
Avoid using same frequencies as TV channels or other radio signals for better performance.

18
TROUBLESHOOTING
1. SYMPTOM: RECEIVER HAS NO POWER.
If you press the power button on the receiver for more than 5 seconds, you
may use the wrong DC adaptor. There are two types of adaptor; AC adaptor
and DC adaptor.
2. SYMPTOM: NO SOUND
Before there was sound coming from the speaker, but now there is no sound.
Please check your cable connection or your battery.
When you change a new battery, but there is still no sound, the battery may
be placed in a wrong position inside the transmitter. Check the battery
position.
3. SYMPTOM: NOISE AND INTERFERENCE
If you hear some noises from your speaker, but the microphone is off, it means
that two same frequencies are being used within 200 feet. Therefore, we
recommend you changing to a different frequency.
When the hand-held microphone is off, the RF should not brink to the
maximum level in your receiver.
If you connect the receiver audio out to the mixer for more than 10 feet, we
recommend you changing it to a balanced cable (XLR to XLR). It would reduce
the noises.
4. SYMPTOM: POOR SIGNAL
Your receiver antenna is not connected properly. Therefore, we recommend
you extending the antennae to its maximum length.
Receiver is placed in the portable rack. When receiver and transmitter are
placed in different rooms made of concrete wall. This would cause poor
signal.
Your audio equipment is close to the police, fire or radio stations. In this case,
you need to change to a different frequency. The first step is to change to a
different frequency in the receiver. Then, change to a different frequency in the
transmitter.

19
WARRANTY
One-Year Limited Warranty for Home Use Equipment
Our one-year warranty applies to speakers, amplifiers, mixers and microphones for
home use only. It covers both parts and labors. The warranty becomes effective from
the date of your purchase for one year.
Our warranty only covers defects due to product defectiveness with free of defects in
materials or workmanship. However, our warranty does not cover defects due to
normal wears, damage in transit, improper use, abuse or failure to follow the proper
instructions for maintenance. This warranty is void in the event of unauthorized repairs,
alternations, modifications and removing of the product label.
Please also note that our warranty does not cover any shipping cost for the return of
defective products to us for inspection, repair and maintenance. Our warranty for
Better Music Builder products can only be executed in North America.
Our warranty does not cover the battery for wireless microphone products.
90-Day Limited Warranty for Public and Commercial Use Equipment
Our 90-day warranty applies to speakers, amplifiers, mixers and microphones for
both public and commercial use such as restaurant, coffee shop, KTV nightclub,
church and school, etc. It covers both parts and labors. The warranty becomes
effective from the date of your purchase for 90 days.
To Register Your Warranty
Please fill out the warranty card that came with your unit, download or submit online
warranty form. However, we need the invoice for your purchase in order to process
this warranty. You may also register your warranty online.
Please visit our website at www.bettermusicbuilder.com.
PRECAUTION
1. If you want to use more than one of this system, please select the work frequency
(or signal channel) carefully so as to avoid disturbing.
2. The input power voltage of the receiver is 120V (±10%). If it is too low or too
high, it will affect the work of the machine.
3. When you install the battery, you must not reverse the electrode or you will
damage the machine.
4. When using the sensitivity solution function, the numerical value you select must be
at least 15dB. Otherwise, if the distance is too far, its signal-to noise radio goes
worse.
NOTE
Caution: To reduce the risk of electrical shock, do not
remove the cover (or back). No user serviceable parts
inside: refer servicing to qualified personnel.
Warning: To reduce the risk of fire or electrical shock,
do not expose this appliance to rain or moisture.
RISK OF ELECTRIC SHOCK
DO NOT OPEN
This symbol, wherever it appears, alerts
you to the presence of uninsulated
dangerous voltage inside the enclosure
voltage that may be sufficient to constitute
a risk of shock.
This symbol, wherever it appears, alerts
you to important operating and
maintenance instructions in the
accompanying literature. Read the
manual.

Printed on 100% Recycled Paper Comments E-mail to [e-mail] Copyright © 2008 BMB :: Better Music Builder. All rights reserved. Legal trademark.
Passionate about Music
www.BetterMusicBuilder.com
®
Better Music Builder is a leader in the Audio and
Karaoke equipment industry. We are committed
to offering you the high quality audio product.
We may update our manual, so we highly
recommend you to download the free update
from our website www.BetterMusicBuilder.com.