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.

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Fosi Audio Q4 DAC Headphone Amp for PC, Desktop Digital to Analog Audio Converter for Home Stereo Amplifier and Powered Speakers, PC-USB/Optical/Coaxial Inputs, 3.5mm Headphone/RCA Outputs

Fosi Audio Q4 DAC Headphone Amp for PC, Desktop Digital to Analog Audio Converter for Home Stereo Amplifier and Powered Speakers, PC-USB/Optical/Coaxial Inputs, 3.5mm Headphone/RCA Outputs

Product ID: 146629540

Details

Brand
Fosi Audio
Maximum Supply Voltage
5
Minimum Supply Voltage
5
Mounting Type
Tabletop Mount
Number of Pins
11

🔊24-bit/192kHz HD audio

🔌USB/Optical/Coaxial inputs

🎛️Bass & Treble adjustable knobs

€ 128.89

Duties & taxes included

In stock

Sold byAmazon PortugalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎧 Elevate your audio game—because your ears deserve the best.

READY OUT OF THE BOX - Comes with all essential cables for instant setup—no drivers, no hassle, just pure sound.
COMPACT POWERHOUSE DESIGN - Sleek full-metal chassis fits perfectly on any desk, combining durability with style.
CUSTOMIZABLE AUDIO EXPERIENCE - Dedicated bass and treble controls let you tailor sound to your exact preference.
AUDIOPHILE GRADE SOUND PRECISION - Supports high-resolution 24-bit/192kHz audio ensuring crystal-clear, immersive listening.
SEAMLESS MULTI SOURCE CONNECTIVITY - Plug-and-play USB, Optical, and Coaxial inputs for effortless integration with all your devices.

The Fosi Audio Q4 is a compact, entry-level DAC and headphone amplifier designed for professionals seeking high-fidelity sound. Featuring versatile USB, Optical, and Coaxial inputs, it supports 24-bit/192kHz HD audio and drives headphones from 16Ω to 200Ω. With adjustable bass and treble controls housed in a premium metal shell, it delivers customizable, crystal-clear audio for desktop, home stereo, and powered speaker setups—all with plug-and-play convenience and included cables for immediate use.

Specifications

ASIN	B07VDQQY95
Audio Output Mode	Stereo
Best Sellers Rank	#7,253 in Electronics ( See Top 100 in Electronics ) #7 in Headphone Amps #28 in Audio Component Amplifiers
Brand	Fosi Audio
Brand Name	Fosi Audio
Compatible Devices	Amplifier, Headphone, Speaker, Television
Customer Reviews	4.4 out of 5 stars 3,343 Reviews
Included Components	User Guide
Interface	Coaxial, Optical, USB
Interface Type	Coaxial, Optical, USB
Item Dimensions L x W	3.9"L x 2.9"W
Item Weight	430 g
Manufacturer	Fosi Audio
Material Type	Metal
Maximum Supply Voltage	5 volts_of_direct_current
Minimum Supply Voltage	5 volts_of_direct_current
Model	Q4
Mounting Type	Tabletop Mount
Number of Channels	1
Number of Items	1
Number of Pins	11
Part Number	Q4
Unit Count	1 Count
Warranty Description	24-month warranty

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