Boston Acoustics BA 100 User manual

Boston Acoustics BA 100
Karaoke Amplier
User Manual
bostonacousticspro.com

Boston Acoustics BA 100
User Manual
Thank you for trusting a high quality audio product developed and produced by Boston Acoustics.
Please refer to and implement the instructions on this User Guide so that the product is set up to correct
technical requirements, helping to bring the optimum experience, while ensuring durability for many
years of use.
Boston Acoustics BA100 series is a powerful karaoke amplier with integrated 24bit / 192kHz DAC, Blue-
tooth connection, USB, Optical and HDMI (ARC) ports. Enabling convenient music playback from smart-
phones, USBs and TVs without having to buy a Karaoke player. Products are equipped with world-leading
quality components for fast and accurate signal processing. The BA 100 series amplier features a wide
range of audio-input connections and an intuitive, easy-to-use button design.
1. Please keep this document for future reference.
2. Please keep all packaging and documentation for easy transport to warranty repair center when
needed.
3. The power source used must conform to the description in the instruction document or the symbol on
the amplier.
4. Do not place device near water sources, humid places to avoid the risk of re, explosion, and electric
shock.
5. Do not place device near sources of heat such as stoves, heat vents, or other heat generating appliances.
6. Do not place objects containing liquid such as vases, water cups, etc. on the device.
INTRODUCTION
FOR YOUR OWN SAFETY, PLEASE READ THE FOLLOWING INSTRUCTIONS CAREFULLY BEFORE USE.
1

AMPLIFIER FRONT
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1. The area on the left of the amplier features ports for receiving music les in MP3 / WAV formats
from USBs and SD Cards, with a display screen and buttons control music playback.
2. Input source selection buttons
yUSB / CARD / BT: choose to play audio from USB / Memory card / Bluetooth connection
yAUX: The AUX port can accept and play Left / Right Analogue audio channels from Karaoke players,
DVD players, and CD players.
yOPTICAL & HDMI: ports for receiving digital audio from TV and from TV boxes, and link Karaoke
players to built-in DACs
3. EFF VOL: Adjust the volume of echo eects when singing Karaoke
4. MIC VOL: Adjust microphone volume for both MIC ports.
5. MUSIC VOL: Adjust the volume of Karaoke background music.
6. POWER ON / OFF: Turns amplier on / o
7. MIC the mic eects control area includes:
yDELAY BALANCE: Adjust the delay eect balance between the left and right speakers, for situations
where one speaker must be placed near a wall/corner and might produce more sound reection. In
addition, this button is also to adjust the Pingpong Delay eect in one repeat cycle will be adjusted
for the left and right speaker channels with dierent levels of Delay, creating the feeling of the sound
running from right to left and vice versa, suitable for large spaces to create more resonance for
microphones.
yDELAY: Adjust the repetition rate, the amount of time between repeated sounds of the microphone
with reverberation eects, increase (fast) or decrease (slow).
yREPEAT: Adjusts the repetition of the Microphone sound, to create a more or echo eect.
yBASS: Adjusts the low frequencies of the microphone.
yTREBLE: Adjusts the high frequencies of the microphone
8. Microphone ports and input volume control button for each Microphone
9. MUSIC: knobs to adjust the tone for background music, including:
yBASS: Adjusts low frequencies for background music.
yTREBLE: Adjusts the high frequencies for background music.
2

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AMPLIFIER BACK PANEL
CONNECTION INSTRUCTIONS
CONNECTING AMPLIFIER TO A SPEAKER
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1. Amplier heat fan: activates automatically when the amplier is too hot and automatically stops spinning
when temperature is stable.
2. MICA / MICB: Microphone pin port.
3. DIGITAL AUDIO IN:
yOPTICAL: Digital signal input port, for connecting optical cable to OPTICAL OUT port on TV or Karaoke player,
HD box….
yHDMI IN: Digital input, only receives HDMI signal from TV via HDMI cable connection to HDMI (ARC) on TVs,
does not receive HDMI signal from Karaoke players, HD players or TV Boxes.
4. AUDIO:
yAUX IN: Analog audio input for L / R channels (for connecting Karaoke, DVD, CD players)
ySUB OUT: Subwoofer connection output port
ySPEAKER SYSTEM: port for connecting L / R speaker channels
5. AC IN: Power cord terminal
NOTE:
yIf you are using this unit to connect with external devices, please only turn on the power switch when you are
sure all connections are technically accurate.
yCheck and make sure the wire is correctly connected to the left and right speakers.
yNote that the wires must be attached properly and securely.
Selecting cables: select a cable with a good conductor to achieve the best sound, usually a double wire cable with
an insulated core, and a wire core diameter of 1.5mm or more is best.
Connection: Before connecting the speaker cable, do not plug in the power to turn on the amplier. Peal/shave o
the cable cover ar the end of the speaker cable to expose the 8mm long core, connect the red (+) speaker port on
the amplier to the red (+) port on the speaker, repeat for the black (-) port.
Note: Make sure to correctly connect the L and R audio channels as noted on the speaker ports on the amplier.

After placing the speaker and connecting the necessary audio signal cables (HDMI or Optical cable
connected to a TV, Left / Right RCA line connecting Karaoke, DVD, or CD players and SUB OUT line to a
subwoofer), Proceed to plug the microphone cable to the rear or front MIC port, then the power cord (AC
IN port) and turn on the amplier (using the POWER switch on the front panel).
1. Using an HDMI cable to lead the transmitted signal from the HDMI (ARC) port on the TV to the HDMI
port on the amplier. To use this HDMI connection source, please press the HDMI button on the front
of the amplier.
2. Using an Optical cable to lead the signal transmitted from the Optical port on the TV to the Optical
port on the amplier. To use this Optical connection source, please press the OPT button on the front
of the amplier.
In addition, Boston Acoustics ampliers can receive audio from Karaoke, DVD, CD players via the RCA L / R
port - AUX IN port. To use this Analog connection source, please press the AUX button on the front of the
amplier.
However, the most convenient and simplest audio source is your Smartphone, Tablet or Laptop,
connecting via Bluetooth. To use Bluetooth connection, click the USB / CARD / BT button on the front of
the amplier, open the Bluetooth device menu on your Smartphone, Tablet or Laptop and select the name
“Boston Acoustics”.
Using a TV as an audio source (YouTube, USB through USB port on TV ...)
4
CONNECTING AN AUDIO SOURCE
1. OPTICAL CABLE
2. HDMI CABLE

HOW TO ADJUST SOUND
ADJUSTING CONNECTED MICROPHONES & SINGING VOICE
First, turn the entire row of knobs for the MIC and MUSIC sections at the bottom part of the front of the
amplier to the 12 o’clock position, then turn the 3 largest buttons, EFF VOL, MIC VOL and MUSIC VOL to
the 7 o’clock position.
Next, plug the microphone cable into the MIC port on the amplier, then connect the power cable and
turn the POWER button to ON.
You can choose to play karaoke background music from a TV (press OPT or HDMI button with connected
cable is Optical or HDMI), Smartphone, or Tablet via Bluetooth connection, press USB / CARD / BT button
and turn on the phone Bluetooth settings connected to the Boston Acoustics amplier name displayed on
the device detection screen.
Turn the MUSIC VOL button clockwise until you reach the desired volume level.
Turn the MIC VOL button clockwise and sing along to the music until the singing is loud enough to blend
with the music. However, to make easier to sing, we recommend adjusting the microphone to be a bit
louder than the MUSIC. This helps singers hear themselves clearly and sing more eortlessly.
- Turn the EFF VOL knob up or down depending on you preference, but typically this knob should be
left at the 10 or 12 o’clock position, adjusting the EFF VOL too high may lead to a hissing sound in the
microphone. If you have a good and powerful voice, setting the knob at the 8 or 9 o’clock position should
be enough.
DELAY: for slow tempo music like Bolero, turn up the Delay level so that the EQ banding is in matches
the rhythm and accompaniment. In contrast, with fast-paced music such as Dance and Remix, you should
reduce the level of Delay.
REPEAT: To make Karaoke easy to sing and vocals more soft and sweet, in addition to increasing the
level of DELAY to create a wide resonance, you can also adjust the REPEAT setting to increase the level of
vibration. Read the word “One”slowly and adjust so that the word is repeated about 6 times so that when
singing with background music, there will be enough natural vibration.
BASS: For those with a thin, slightly soft voice when singing, you can turn the BASS up to make the sound
warmer, and more powerful, moderately adjust to your preference with causing distortion.
TREBLE: For those with a deep voice, to make the singing sound more clear and bright, you can turn up
TREBLE, increase just enough to not cause any distortion or howling.
5

ADJUSTING BACKGROUND MUSIC
Depending on the real world feel when listening, you may hear the excess or lack of sound range
that needs to be compensated, depending on personal preference. You adjust BASS and TREBLE for
background music, but make sure that the sound blends well with the singing, without causing buzzing or
howling or hissing in the speaker.
Final notes when adjusting the Boston Acoustics karaoke amplier
yIf you feel a lack of power when singing, turn up the BASS and TREBLE knobs in the MIC tuning section
slowly, if you increase a lot or suddenly, it will cause howling and hissing.
yFor bright vocals, turn up TREBLE knob in the MIC and EFF VOL sectionss.
yTere is howling and hissing, please turn the EFF VOL and MIC VOL knobs down slowly.
To optimize your singing, follow the instructions below for MIC adjustment:
ySpeak in to the Microphone and adjust the MIC VOL moderately to your liking
yAdjust the BASS sound by reading the numbers “1”, “4”, “7” into the microphone while turning the BASS
knob slowly clockwise until you can hear yourself clearly. Turning up the bass quickly suddenly may lead
to a buzzing and humming sound that can easily cause a howling sound, in this case turn the knob down
slowly to eliminate the phenomenon. Usually the BASS knob should be left at the 11 o’clock or 12 o’clock
position, but depending on the frequency response of the speaker and microphone, you may need to
compensate accordingly.
yAdjust TREBLE tone by reading numbers “6”,“9” into Micro while turning the TREBLE knob slowly down
clockwise until your voice sounds clear. If you turn up the treble quickly and suddenly, it may lead to a
shrill sound that can easily cause a squeaking and a hissing sound, turning the treble down slowly will
eliminate the phenomenon. Typically, the TREBLE knob should be left at the 11 o’clock or 12 o’clock
position, but depending on the frequency response of the speaker and microphone, you may need to
compensate accordingly.
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Model BA 100
Wattage RMS (8 Ohms) 100W/channel
Wireless connection Bluetooth
HDMI input 1
Optical imput 1
USB type A port for music 1
SD card input 1
Analog input Micro x 4, AUX x 1 RCA Left/Right
Output Sub Out RCA Left/Right x 1
Dimensions (Height x Width x Depth) 140 x 430 x 330mm
Net weight 10kg
SPECIFICATIONS