Fosi Audio BL20C, User Manual, Page: 5 / 12

Package Contents
Fosi Audio BL20C Amplifier*1
AC Power Cord*1
24V/4.5A Power Supply *1
Bluetooth antenna*1
User Manual *1
Quick Setup
Preparation
Prepare 1: BL20C, 24V power supply, passive speaker, active
subwoofer, speaker wires or banana plugs, RCA cable;
Prepare 2: Make sure the volume is at a minimum.
Prepare 3: Connect passive speaker via the speaker wires or
banana plugs, and connect active subwoofer via 3.5mm
AUX cable, please pay attention to distinguish between
positive and negative polarity.
Prepare 4: Make sure the power switch is on the "OFF" position.
Prepare 5: Connect the power supply and turn it on, the power
indicator shows red light.
Note: Please make sure that the power switch is in the OFF
position before connect the power supply.
How to connect the speaker wire?
Method 1: Bare wire connection illustration
: Release the horn terminals block terminals;
: Insert the two ends of the speaker wire into the
amplifier and speaker terminal holes;
: Tighten the horn terminals;
Note: Please make sure that the speakers’ wire are not attached
with each other, the speaker connection area is very
narrow,
Method 2: Banana plugs connection illustration
: Release the banana jacket;
: Loosen the screw;
: Insertion speaker wire and tighten the screw;
: Tighten the banana jacket;
: Insert the banana plug into the horn terminals of the
speaker and amplifier.
Note: Please make sure that the speakers’ wire are not attached
with each other, the speaker connection area is very
narrow, it is easy to cause the positive and negative
speakers’ wires to contact each other, which will result in
no sound output.
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Bluetooth Input
Prepare your Bluetooth device (take a phone as an example)
Step 1: Install the Bluetooth antenna.
Step 2: Switch the input mode to the "BT/USB" position, the
"BT/USB" indicator shows blue light.
Step 3: Turn on the Bluetooth on your phone and connect
“BT HIFI AUDIO” .
it is easy to cause the positive and negative
speakers’ wires to contact each other, which will result in no sound
output.
Release Jacket Loosen Screw
Insertion speaker wire
tighten screw
Tighten Jacket
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banana plug into
the horn terminals
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