Fosi Audio V3 BLACK+32V User manual

V3 User Manual

Product Overview
The V3 is a high-performance stereo audio power amplifier developed by
Fosi Audio based on user needs. It features Texas Instruments' high-end
TPA3255 digital amplifier chip, supporting up to 600W of output power
(into 4Ω impedance speakers). The V3 comes with an innovative design in
that there are cooling vents on top and bottom of the aluminum alloy
chassis, and the amplifier chip's heat sink is attached to the casing, turning
the entire chassis into a heat dissipator. This significantly enhances heat
dissipation performance, ensuring chip stability and safety, and providing
solid support for continuous high-power output. The V3 also integrates
numerous HiFi class capacitors, inductors, and resistors to ensure stable
and pure high-fidelity audio output. Furthermore, the V3's op-amps are
replaceable, allowing you to easily swap different op-amps for a
personalized music experience.
The V3 is a mini amplifier designed for music enthusiasts, and we believe
it will take you on a wonderful journey through HiFi music.
Audio Channel
Power Amplifier Chip
Input Interface
Output Interface
SNR
Dynamic Range
THD
Terminal Impedance
Output Power
Frequency Response
Input Voltage Range
2.0
TI TPA3255
RCA In
Speaker Output (Banana Plug
or Bare Wire), Pre-Out
≥110dB
SINAD 88dB
≥110dB
<0.003%
2~8Ω
Max 300W x2@4Ω
20Hz-20kHz (±0.1dB)
DC 24V~48V
Product Specifications

Package Contents
V3 Power Amplifier ×1
Power Supply ×1
User Manual ×1
Power Switch/
Volume Control
Power
Indicator
RCA
Input
Pre-Out Left
Channel
Output
Right
Channel
Output
DC Power
Input

Troubleshooting
Quick Steup
Do not plug in the power cord until all connections are complete.
Step 1: Prepare your audio source device, V3 power amplifier, 24V-48V
power adapter, passive speakers, speaker cables (with banana plugs or
bare wires), and RCA audio cable;
Step 2: Plug the RCA cable into the RCA input terminal of V3, red for right
channel and white for left channel. Connect the other end to your audio
source device;
Step 3: Connect the speakers to the V3's speaker terminals with the
speaker cables, ensuring the polarity is matched correctly. The red is the
positive pole, while black is the negative pole. You scan the QR code to
watch the instruction video;
Step 4: Plug the power adapter connector into the DC power input port of
V3, and power cord into an AC outlet;
Step 5: Turn the knob clockwise to switch on the V3, and the red power
indicator light will be on. Then you can play songs on your audio source
device and start enjoying music.
NOTE: The pre-out terminal can be used to connect an active subwoofer,
active speakers or a second amplifier to expand or customize your audio
system.
The system is set up, but there is no sound output.
• There may be no power. Please check whether the power indicators
on the V3 and power adapter are on or not.
01.

NOTE: If you still can't solve the problems, please scan the QR code to
learn more or contact our support team [email protected]
• The volume may be too low. Please turn the volume knob clockwise
to raise the volume.
• The audio cables may be connected incorrectly. Please follow the
instructions above to reconnect the cables;
•The songs in your audio source device may not be played or the
sound is muted. Please check on the audio source device.
The sound output is abnormal.
• Please ensure the polarity is matched correctly when you connect
the speaker cables to the binding posts. The red is the positive pole,
while black is the negative pole;
• The speaker cables may not be in good contact. Please try to
reconnect or swap the cables;
• The RCA cable may not be in good contact. Please try to reconnect
or swap it;
• The V3 amplifier may be overloaded. Please turn down the volume.
Cannot play when connecting the turntable.
• The turntable may not have a built-in phono preamplifier. Please
check in your turntable's user manual. You'll need an external
preamplifier to connect your turntable and the V3 to play your record;
• The phono output mode may be incorrect. Generally speaking, there
are phono output and line output modes. Please select the line output.
Why the device connected to the pre-out is still playing
after turning V3 off?
• The pre-out terminal is designed to bypass the amplifier's built-in
power amplification stage. The knob on V3 does not affect the
pre-out's signal output or volume. You need to turn off or modify the
volume on the device connected to the pre-out.
02.
03.
04.

Warranty and Maintenance
About Us
Fosi Audio pledges to give an 24-month limited warranty and support from
the date of purchase. If you encounter any problem when using our
product, please contact our support team at [email protected].
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 pursues. We
sincerely hope you get as much enjoyment from our products as we’ve had
to create them!
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:
[email protected]
Fosi Audio Product’s User Manual:

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故障排除
安装指南
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保修卡
󴲋󹹢󳫁󶀱󾙏󲜾󴅞󳕜󱜅󵈧󱒹󶾨󸈐󱪡󹞬󹰸󽙓󸘕󳢕󵸿󱕞󸈐󴁍󲚃󳟾󶶷󶹎󶟮󳟹󱗽
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󲜾󾙓󾙔󾙖󶑂󾙐
󱿾󴃍󸯀󱬕󴖸󳊬󱒹󲳳󽙓󱩣󶱭󱮆󶭳󵯔󱿾󴃍󱒪󷈹󴁸󱿾󴃍󸯀󱬕󱼑󶮋󸤀󸯀󱬕
󱓝󶅉󽙓󸘕󸳓󳥌󶮋󸯀󱬕󾙐
󱩊󳩉󾙕󱹖󽙓󸴁󸰬󱮆󶱭󸯀󱬕󸱡󳩺󵯔󸗜󲙘󱗒󲍨󳱎󳵳󾙑
󾙕󵯔󱮆󶱭󸯀󱬕󸗜󸖿󱓺󵲃󸴁󽙓󱒹󱸉󱰖󳵳󳩾󱭧󽙓󸘕󲍨󸱡󳩺󱮆󶱭󸯀󱬕󵯔
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󾙒󾙕
󾙒󾙖
󴁽󱰘󴂠󹠠
󴰲󲍵󸱟󷮠󶅎󳢸󴁸󹠠󱨾󱸻󳢶󸘘󱖓󱽢󵯔󷋣󲜲󱽢󸟰󽙓󱖓󱽢󷆦󱿺󱬕󾙙󳺝󱩣󽙓󲍨
󴟽󳄜󱛔󵥌󳖐󱪦󱒷󱬕󵚧󳵻󹢥󽙓󲰺󳠴󱸯󱗵󳺑󴄄󱘎󸲻󳨇󸟯󴟽󳄜󱛔󵥌󱓝󳅸
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󸟵󱔾󳺝󴂠󱗵󱸁󶂉󳟾󳵦󳨛󳺝󴂠󱓺󱫃󽙓󶱁󱒶󸟵󱔾󳥾󸗀󱴾󳺝󴂠󱓺
󱫃



󳺑󴩰󱖙󱸉󾛒󱒵󱲯󾛓󴁽󱰘󵯔󳖐󱪦󾙏
󾙓󱒪󱬫󱖶󱓺󲋶󶠽󳨄󲎟󽙓󱲯󳥏󱙺󱒹󹠠󱕨󹨾󴟽󳄜󳂥󱚝󵚦󲖀󱒷󱛔󵥌󳟾󶶷󱒹
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󾙒󾙖

Fosi Audio について
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