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Note: You don’t need to connect all the outputs. You can
connect 2 passive speakers only.
Or you can connect it to the pre-out as a preamplifier.
And you can connect all the outputs simultaneously.
Step 3: Connect the power adapter to BL20A and the socket.
Long press the Multi-function Knob(Power Switch/Mode
Switch/Volume Control) to power on the BL20A.
Then the input mode indicator light of BL20A stays red
after power is on.
Note1: Please make sure the LED light on the power adapter
stays on.
Note2: Before connecting the power supply, please turn
down the bass and treble control to 0 (always to the
left) to avoid your hearing from damage.
Step 4: Connect the audio source (AUX input/U-Disk
input/Bluetooth input) to the BL20A.
• AUX Input: Use a 3.5mm audio cable to connect the BL20A
and your device. The input indicator light will
stay on Red.
Quick Setup
Step 1: Install the Bluetooth antenna to the BL20A.
Step 2: • Use speaker’s wire to connect the speaker’s output
to your passive speakers.
• Or use 3.5MM audio cable to connect the 3.5MM
AUX pre-out of BL20A to your amplifier, then use
speaker’s wire to connect the amplifier with your
passive speakers.
• Or use 3.5MM audio cable to connect the 3.5MM
AUX pre-out of BL20A to your powered speakers.
L
R
INPUT
PRE-OUT
OUTPUT
SPEAKERS
ANT
Bluetooth
DC 12V-24V
Bluetooth
Antenna
Active Speakers Passive Speakers
Power
Adapter
Amplifier
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