Fosi Audio TB10A User manual

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Fosi Audio TB10A User Manual

Product Specifications
Fosi Audio TB10A is a Hi-Fi stereo 2-channel amplifier that
features 100W x 2 output, , it is a mini power amp which is
equipped with bass and treble control. Simple compact design
but practical and powerful! Home Hi-Fi integrated amplifier
designed for the customers who pursue Hi-Fi sound!
Audio Input: RCA Input
Power supply: 24V 4.5A
Power supply voltage range: 12V-24V
THD: ≤ 0.5%
SNR: ≥ 98dB
Frequency Rang: 20Hz - 20kHz (±1 dB)
Input Sensitivity: ≤ 280mV
Terminating Impedance: 2Ω-8Ω
Output Power: 100W + 100W
Product Size: 130 x 100 x 35 mm
Product Weight: 650g

Product Overview & Control
Functions
RCA Input
Speakers Output
DC 12-24V Input
Treble Control
Power Switch
Power Indicator
Bass Switch Volume Control

Package Contents
Fosi Audio TB10A Amplifier *1
AC Power Cord *1
24V Power Supply *1
Instruction Manual *1
Quick Setup
Preparation
Prepare 1: TB10A, 24V power supply, passive speakers, speaker
wires or banana plugs;
Prepare 2: Connect the TB10A to the passive speakers via the
speaker wire or banana plugs;
Prepare 3: Connect the 24V power supply to the DC input;
Prepare 4: Toggle the power switch on the front panel upwards to
turn on the TB10A amplifier.
Note: Be sure that the volume/power switch is in the OFF position
before connecting 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 avoid the speaker wires being exposed and touching
the amplifier casing, as this may cause a short circuit fault.
1
2
3

Package Contents
Fosi Audio TB10A Amplifier *1
AC Power Cord *1
24V Power Supply *1
Instruction Manual *1
Quick Setup
Preparation
Prepare 1: TB10A, 24V power supply, passive speakers, speaker
wires or banana plugs;
Prepare 2: Connect the TB10A to the passive speakers via the
speaker wire or banana plugs;
Prepare 3: Connect the 24V power supply to the DC input;
Prepare 4: Toggle the power switch on the front panel upwards to
turn on the TB10A amplifier.
Note: Be sure that the volume/power switch is in the OFF position
before connecting 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 avoid the speaker wires being exposed and touching
the amplifier casing, as this may cause a short circuit fault.
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 take care to avoid contact between the two banana
plugs and causing a short circuit fault as some of the
banana plugs are metal cased.
1
2
3
4
5
1 2 3
Follow RCA Input Steps:
Prepare: audio source (take a phone as an example), a RCA cable
or a 3.5mm AUX to RCA cable (some devices will need).
Step 1: Connect your phone to TB10A via a 3.5mm to RCA cable;
Step 2: After a successful connection to TB10A,The input mode
indicator light will turn red;
Step 3: Open the audio application, play and enjoy!
Note: Please keep the TB10A away from other electric device. The
TB10A can't use with a radio simultaneously
Release Jacket Loosen Screw Insertion speaker wire
tighten screw Tighten Jacket
1 2 3 4
banana plug into
the horn terminals
5

Troubleshooting/QA
1: What type of speakers work best with TB10A Amplifier?
• TB10A works great with any 2-8 Ωpassive speakers.
Note: please know that the TB10A amplifier is for passive
speakers, not for powered speakers and subwoofer.
2: Why does the TB10A make serious noise when used
together with a radio?
• A common feature of Class D power amplifiers is that they can
cause serious noise when used with a radio, so we do not
recommend using the TB10A with a radio or too close to it.
3: Can I connect a turntable to TB10A amp, why is the
volume is extremely Low?
• As for the turntables do not have a built-in preamp, you need to
add an external phono preamp before connecting TB10A.
• As for the turntables which have a built-in preamp, you need to
switch the preamp on before connecting TB10A.
4: Why does my power indicator not light up?
• Please check that the AC power cord is securely connected to the
power supply and to an AC power outlet.
• Please check that the AC power outlet is supplying power, make
sure the power LED on the power supply will stay on.
• Please replace another power supply and try it again.12-24V DC
power supply are suitable.
• If you make sure the power supply is defective, please contact us
for exchange.

5: Why does the sound is cracking or make a lot of
electric noise?
• Please make sure all the cables completely pushed into the
devices, incompletely connection will cause this cracking.
• Please remove all the inputs then check whether cracking noise
disappear or not, the cracking maybe from the audio source or
input cables.
• If you are not using the original factory standard power supply,
please replace the power supply before testing. Many power
supply in the market have large interference coefficient, which
will cause a lot of current sound.
6: Can I use headphone with this product?
• No, the TB10A cannot be connected to headphones and only
supports passive speakers.
7: Why there is no voice from my amplifier?
• Please check whether the cable of power supply is connected to
TB10A and whether the power indicator is on.
• Make sure the TB10A's indicator light is on when the power is
turned on.
• Please check that the TB10A and your source components are
turned on and not set to minimum volume, if possible replace
your source and test again.
• Check that the wire connections from the audio source to each
speaker in the amplifier are connected correctly.
• Please check that the cable is not loose, damaged. Incomplete
connection is one of the main reasons for no sound.

8: How much power does this use in standby mode? Can
this amp be left on all the time?
• This is the class D amplifier, it will cost very low power when it is
in standby mode. It can be connected all the time and it is safe
without power consumption.
9: Sound quality is not good?
• Make sure all the cables are fully connected.
• Adjust the treble and bass control of the power amplifier to
achieve the right tone.
• Please try to change the sound source and cables to test.
10: Should I unplug the power cord?
• If the item will not be used for a long time, please unplug the
power plug to prevent the item from being burnt due to lightning
strike.
11: Can I bridge channel 1 and channel 2 to get 200watts?
• NO, this amplifier can't be bridged.
12: How can I connect TB10A to TV?
• Because the TB10A has an RCA input, it can be connected to
a TV.
13: Will I be able to turn up the volume using my TV
controller or will I need to adjust the volume manually?
• Technically speaking the TV's remote control does not control the
volume of the amplifier and adjusting the volume of the amplifier
requires the manual use of the amplifier's volume control buttons,

but the size of the signal from the TV to the amplifier will affect
the sound output of the amplifier.
14: Why the sound cut in and cut out?
• Try to reduce the sound of the sound source.
• Try to change the audio source to test.
• Reduce the volume of the treble and bass knob on the TB10A.
• Ensure that the positive and negative poles of the speaker output
do not touch together. Some relatively large banana plugs are
easy to touch together and cause a short circuit.
15: Can I Connect a Subwoofer to the Fosi Audio Amps?
• If you bought subwoofer amps from Fosi Audio or 2.1 channel
amplifier(the amp that with sub output), you can connect to a
subwoofer, but if you got the 2.0 channel amp, you can't connect
to the subwoofer.
16: Can I exchange the power supply come with the
amplifier and to get more power?
• The TB10A comes with 24V 4.5A power supply, it's enough for
most bookshelf speakers, but if you want to get more power, you
can exchange the power supply, the voltage range is DC12-24V,
you can use 24V 8A, or 24V 10A power supply.
17: Can I take the TB10A to other countries?
• Yes, the wide voltage AC 110-240V for power input can be used in
any country. You only need to match the power cord adapter of
the corresponding country.
Any problems please leave a message to the customer
support email address: suppor[email protected]

Comparison Section
Model
Type 2.0 CH Amp 2.0 CH Amp 2.0 CH Amp 2.0 CH Amp
Picture
Input RCA RCA RCA RCA
Output Passive Speakers Passive Speakers Passive Speakers Passive Speakers
Power Adapter 24V/4.5A 24V/4.5A 19V/4.74A 19V/4.74A
MAX Power Output 100 wattx2 160 wattx2 50 wattx2 50 wattx2
TB10A TDA7498E V1.0G V1.0B

Our website: www.fosiaudio.com
Amazon store: www.amazon.com/fosiaudio
Our Youtube channel: Fosi Audio
Our Facebook page: Fosi Audio
After-sale Service and Technical Support Email:
[e-mail]
[e-mail]
Warranty Information
• All Fosi Audio products have an 18-month limited warranty on
parts and labor from the date of purchase. Please contact us if
you have any problems.
About Fosi Audio
• Fosi Audio designs and builds innovative audio products with
all your music in mind. Great sound, simple but elegant
designs, high-quality materials, and truly useful features are
what Fosi Audio is about. We sincerely hope you get as much
enjoyment from our products as we’ve had to create them!
Fosi Audio Product’s User Manual