Installation Manual

HiFi Made Fun

www.fosiaudioshop.com

Q1. How to contact us?

Please contact us via email at customer@fosiaudioshop.com or fosiaudio@hotmail.com.

Q2. Why the sparks flying when I plug the power cord into the amplifier?

Please plug the power cord into the amp THEN the AC outlet, plug the audio cables into amp

THEN switch on.

Some customers may see some slight sparks flying when they plug the power supply into the

amplifier, because they use it in wrong way, you need to connect the amp to the power supply

first, then plug the power supply into the 110v AC outlet, don't worry about the sparks, because

this is class d amplifier, the capacitors need to charge when the power in, it's normal and safe.

Q3. My amplifier doesn’t turn on, the power LED light never on.

Check to see that the AC power cord is securely connected to the power supply and to an AC

power outlet.

Check that the AC power outlet is supplying power.

Please change another power supply(DC12V- 24V) to have a try if you have, if the amplifier

power LED light still off, please contact seller support.

Q4. How to connect the audio system?

Step1: connect the amplifier to your speakers via banana plugs or bare wire.

Step2: connect the amplifier to power supply;

Step3: connect the power supply to AC outlet;

Step4: connect the amplifier to your audio source via RCA cable;

Step5: turn on this amplifier and connect the Bluetooth if need.

Step6: Volume up and enjoy;

Q5. Why the LED light of the amplifier stay on even I turn off the switch of the amplifier?

The amp will off when you switch off, but it’s normal that the power LED light stay on even switch

off, the power LED light on means the power supply connected. The switch off can turn off the

amplifier as well as the speakers.

Q6. My Bluetooth device will not pair with this amplifier.

Verify the power switch is turned on, and the power LED light on the device is on.

Make sure your device is within range of Bluetooth.

Make sure no other devices are connected, if so, disconnect or turn off Bluetooth on the other

devices, then try to pair again.

Try to turn off the amplifier and turn on again.

Cycle the power by disconnecting and reconnecting the power cable.

Q7. The amplifier LED on, but there is no sound out from speakers.

Did this amplifier ever connected to your Bluetooth device? Please turn off Bluetooth from the

Bluetooth device you ever connected with this amplifier. If Bluetooth connects, playback from

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HiFi Made Fun www.fosiaudioshop.com Q1. How to contact us? Please contact us via email at customer@fosiaudioshop.com or fosiaudio@hotmail.com. Q2. Why the sparks flying when I plug the power cord into the amplifier? Please plug the power cord into the amp THEN the AC outlet, plug the audio cables into amp THEN switch on.
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the physical input is interrupted. If you want to connect this amplifier with the audio cable(physical RCA input), you need to interrupt the Bluetooth first.(turn off Bluetooth from your Bluetooth device). Recheck speaker wire connections from the amplifier to each speaker. Verify that the amplifier and your source components are turned on. Check that the AC wall outlet is on and working. Check that the volume/power knob on the front panel is turned on and not set to minimum volume.
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audio cables to and from the amplier. • Turn the amplifier back on and check for hum. If the noise is still audible try plugging the amplifier power cable into a different AC outlet. • If the hum goes away while the audio cables are still disconnected, the noise is likely coming from another component in your system. Connect each component back one at a time and the one that causes the system to hum is likely the culprit. • A common ground-loop source is from cable TV or satellite cables.