Description

From the brand

Product Description

Literally Plug and Play Fosi Audio Q4 DAC & Headphone Amplifier

A compact and lightweight, user-friendly desktop audio device.

Your Sound Perception Will be Revolutionized

Q4 is an entry-level all-in-one DAC and headphone amplifier. It is plug-and-play and does not require any driver. It has the characteristics of high signal-to-noise ratio and low distortion.

PC-USB Sampling Frequency: 24bit/96kHzOptical/Coaxial Sampling Rates: 24bit/192kHzSNR: >105dB; THD: 0.01%; Bass and Treble Range: ±6dBOperation Systems: XP/Win7/Win8/Win10/Win11/MAC/Linux

Can Q4 output analog stereo audio through both the 3.5mm headphone jack and the RCA red/white jacks at the same time?

Q4 will mute the RCA output when headphones are plugged in.

How do I connect Q4 to my computer with USB input?

Your other USB cables must support OTG function.

-For iPhone: Use a USB B to Lightning OTG Cable.

-For Android: Use a USB B to TYPE C Cable.

Where is the 0db position (Q4)?

The 0db position is at 12 o’clock on the knob.

Does Q4 support PS5?

Yes, it supports PS5.

Can RCA output be connected to a soundbar (e.g., AUX input) (Q4)?

Yes, it can work.

Quick Troubleshooting Guide

1. Common Audio Issues

– One Channel Has Sound or Unbalanced Output: Ensure all cables are securely connected. Test with different cables and input modes. For RCA output, check speaker connections. For headphones, ensure the jack is fully inserted and try different headphones.

– No Sound from USB: Use different USB cables and ports. Restart your computer and select the correct sound output device (e.g., HIFI Audio). Update or reinstall the USB driver.

– White Noise or Static: Set the volume to 50% or lower. Ensure all cables are securely connected and test for interference from nearby devices. Use well-shielded cables and try different input modes. For headphones, use high-impedance headphones to reduce noise.

2. Connection and Compatibility

– Connecting to a Computer: Ensure your USB cables support the OTG function. For iPhone, use a USB B to Lightning OTG Cable. For Android, use a USB B to Type-C Cable. Follow the setup guide for detailed instructions.

– Connecting to a TV: Use a coaxial or optical cable. Ensure the TV is set to PCM/RAW mode and disable Dolby or DTS sound. Follow the setup guide for detailed instructions.

– Power Issues: Ensure a stable power supply. Replace the power cable or adapter if necessary. Refer to the tutorial video for guidance.

3. General Tips: Driver Updates: If you encounter driver errors, update to the latest Microsoft driver (KB5050094) for compatibility. Volume Control: The TV remote cannot control the Q4 volume when connected via optical or coaxial. Use the Q4 volume knob instead.

Your Guide to Choosing the Right Headphone Amplifier

• High-Performance DAC: The Q4 headphone USB DAC incorporates high-performance operational amplifier chips from Texas Instruments, specifically the NE5532, which combines exemplary DC and AC characteristics. This device offers very low noise, high output-drive capability, high unity-gain bandwidth, low distortion, and high slew rate. It also includes input-protection diodes and output short-circuit protection. It has a specified maximum limit for the equivalent input noise voltage
• Bass and Treble Controls: The DAC amp for PC has bass and treble adjustment knobs on the front, which is great for balancing levels from music to movies/TV/computer/headphones/speakers system/DVD player with a crisp sound. The Fosi Audio Q4 is capable of delivering 160mW RMS (32 ohms, 20 Hz – 20 KHz, 0.01% THD) of power. Set up easily and requires no special software, app, or driver installation, as it is a true plug-and-play digital audio adapter
• Various Inputs and Outputs: The DAC amp combo is a versatile device that connects to most home audio systems and headphones. It features PC-USB, Optical, and Coaxial inputs, along with RCA and 3.5mm headphone outputs. (Note: it does not support microphones.) The Hi-Fi headphone amp chip powers headphones with impedance ranging from 16 Ohms to 200 Ohms, and the RCA output allows for connection to an amplifier or powered speakers on a desktop
• Compact Audio DAC: The DAC audio is a mini compact DAC converter with a full metallic shell that ensures high quality and compensates for TV headphones’ lack of audio control. It streams bit-perfect 24bit/192KHz HD with low jitter, with an output protection circuit to safeguard your expensive audio system
• What You Get: Fosi Audio Q4 USB DAC Headphone Amp x1, USB charging cable x1, optical cable x1, PC-USB to type B cable, User Manual x1. Power Input: the Type C