Tutorial Video

MC351

• Multiple Features in One? MC351 2.1-Channel Integrated Amplifier

HT4S

• One Amp, Multiple Use? Fosi Audio HT4S Multi-Function Integrated Amp

PH05

• Fosi Audio PH05 Five-Ch Headphone Splitter/Amp Introduction & Demonstration

BOX X4

• How to Connect a Turntable to An Amplifier and A phono preamp

T20X

• Connecting Turntable (With Built-In Preamp) and T20X AUX INPUT

V3 MONO

• How different op-amp chips affect sound signature, including the NE5532, Sparkos SS3602, and MUSES02?
• Is 48V/10A Power Supply Better for V3 MONO? Find Out the Truth Here!
• V3 MONO Op-Amp Chips and Troubleshooting Tips
• Is 48V/10A Power Supply Better for V3 VOMO? Find Out the Truth Here!
• How to Set Up V3 MONOs in a 2.1 System? P3+V3 MONO Combo Recommended!!
• V3 MONO Gets Warm during Operation? Dive Deep into its Heat Dissipation Design!

See all 7 articles

T3

• How To Use BT Mode on the T3?
• How To Use Aux Mode on the T3?

TB10D

• How to Connect Passive Speakers to TB10D [no Bluetooth] ?

V1.0G

• How to Connect Passive Speakers to V1.0G?

PH04

• How to set up PH04 4-channel headphone amp?

BT30D PRO

• How to hook up my 2.1 speakers with BT30D PRO?

Q4

• How do I connect Q4 to my computer with USB input?
• How to connect a cd player via optical cable to Q4?
• How to Use Q4 with PS5?
• How to connect Q4 to a TV with COA input?

DA2120C

• How to connect your Bluetooth device to DA2120C?
• How to connect optical cable from CD player to DA2120C?
• How to connect the DA2120C to your computer via USB?

SK02

• Fosi Audio SK02 Desktop DAC/Headphone Amp Introduction and Demonstration

LC30

• Fosi Audio LC30 Amplifier/Speaker Selector Introduction and Demonstration

BOX X3

• How to Connect Turntable to BOX X3 MM INPUT and Powered Speaker?
• Connecting Turntable and Amp to BOX X3 (AUX INPUT)
• How to Connect Bluetooth Device to BOX X3
• Connecting Turntable and Amp to BOX X3 (MM INPUT)

DS2

• How to Connect different Sources to DS2?

DS1

• How to Use DS1 with PS5?
• What do the various colors of DS1’s LED indicate on Mac?

T10

• How to make T10 Sync with WiiM - For Android device WiiM Player app
• How do I connect Fosi T10 to wired Ethernet?
• How to make T10 Sync with WiiM - For Apple device WiiM Home app

BT20A Pro

• How do you replace a knob for the BT20A PRO Amplifier?
• BT20A Pro with Various Op-Amps Demonstration
• Fosi Audio BT20A Pro Amplifier Introduction

ZA3

• How to replace op-amps on Fosi Audio ZA3?
• How to replace op-amps on Fosi Audio ZA3?
• How to set up a 2.0-channel system using two ZA3 units (mono) with RCA inputs?

V3

• Fosi Audio V3 Mini Stereo Amplifier Introduction
• Fosi Audio V3 with Various Op-Amps Demonstration
• How to replace the Op-Amps in the V3?
• How do you replace a knob for the V3 Amplifier?
• How to Disassemble & Reinstall the V3?
• How do I connect my DAC and V3 to passive speaker?

K5 Pro

• Fosi Audio K5 Pro Gaming DAC HeadphoneAmplifier Introduction
• How to Connect different Sources to K5 PRO via USB ?
• How to Use K5 Pro with PS5?

P3

• Fosi Audio P3 Tube Preamp Introduction
• How to install the tubes on P3?
• How do you replace a knob for the P3?

Parts & Accessories

• How to Connect 4mm Banana Plugs to Speaker Wire?
• How to choose the right banana plug?
• How to Diagnose Power Supply Failure
• The Soundbar or Amplifier remote control doesn't work

Others

• What to Do If Your Amp/Preamp/DAC Won't Turn On
• How to Choose the Right Cables for Different Inputs and Outputs Ports？
• Fix Sound not Coming Through Headphone output
• How to Fix No Sound Issues When Connected to Bluetooth?
• HOW TO FIX THE BLUETOOTH PAIRING PROBLEM?
• How to make the USB mode work correctly?

See all 10 articles