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The Q4 is a compact mini digital/analog audio converter adapter with USB, optical, and coaxial digital inputs, a classic 3.5mm headphone jack, and RCA outputs, suitable for most home audio systems. It can be used as a preamplifier or volume control for PC/MAC/Computer with bass and treble controls. Fosi Audio Q4 ensures exquisite musicality, accurate and realistic phasing, and reproduction of the original sound!
Input Type: | USB, Optical, Coaxial |
Output Type: | 3.5mm Headphone, RCA |
Chipset: | SA9023+CS8412+ 97220+NE5532 |
USB Sampling Rate: | 24Bit/96kHz |
Optical/Coaxial Sampling Rate: | 24Bit/192kHz |
Headphone Impedance: | 16-200Ω |
RCA Output Level: | 2.3V |
Power Supply: | 5V |
THD: | ≤0.01% |
SNR: | ≥105dB |
Size (L*W*H): | 73.5*98*33MM |
Net Weight: | 0.4kg |
Fosi Audio DAC-Q4 ×1
5V USB Power Supply Cable ×1
PC-USB Cable ×1
Optical Cable ×1
User’s Manual ×1
PC-Windows, for example.
Prepared Q4, PC, AC adapter, PC-USB cable, Micro-USB cable, and headphones.
Step 1: Connect the Micro-USB cable to the AC adapter, then connect the Micro-USB cable to the Q4;
Step 2: Connect the Q4 to the PC via the PC-USB cable;
Step 3: Turn down the volume control to the lowest level (turn off the power switch) and connect the headphones to the 3.5mm headphone jack;
Step 4: Adjust the input mode selection key to select USB input mode;
Step 5: Turn on the power switch (turn up the volume); (Note: The power switch is also the volume control knob.
Turn on: Turn the volume knob clockwise to the right;
Turn off: Turn the volume knob counterclockwise to the left and adjust the volume to a minimum.)
Step 6: Left click on the computer’s desktop sound icon and select
Device: “Fosi Audio Q4″ (Digital HiFi Audio);
Step 7: Open the audio application, play it, and enjoy!
(Note: Before connecting the power supply, please turn down the volume control to the lowest level to avoid damage to your hearing.)
Prepare Q4, AC adapter, Micro-USB cable, optical device (TV, for example), and optical cable.
Step 1: Connect the Micro-USB cable to the AC adapter, then connect the Micro-USB cable to the Q4;
Step 2: Connect the TV to Q4’s optical interface via the optical cable;
Step 3: Adjust the input selection button to select optical mode;
Step 4: Set the TV’s optical output sound to RAW/PCM;
(NOTE: Due to different TV types, some TVs default Dolby or DTS sound output, Q4 DOES NOT Support Dolby and DTS sound, please select RAW/PCM Sound; otherwise, you will hear a lot of noise or no sound output.)
Step 5: Open the audio application, play and enjoy
Prepare Q4, AC adapter, Micro-USB cable, Coaxial device (TV, for example), Coaxial cable (no include).
Step 1: Connect the Micro-USB cable to the AC adapter, then connect the Micro-USB cable to the Q4;
Step 2: Connect the TV to Q4’s coaxial interface via the coaxial cable;
Step 3: Adjust the input selection button to select coaxial mode;
Step 4: Set the TV’s coaxial output sound to RAW/PCM;
(NOTE: Due to different TV types, some TVs default Dolby or DTS sound output, Q4 DOES NOT support Dolby and DTS sound, please select RAW/PCM sound; otherwise, you will hear a lot of noise or no sound output.)
Step 5: Open the audio application, play, and enjoy!
Note: The Micro-USB cable cannot be fully inserted into the device power port; please do not force it. Subsequent revisions have been made.
If a Windows update causes the device to be unrecognized, please update all windows components, reboot, and retest. Please contact me for a solution.
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