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.

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

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

🎧Drives 16Ω-200Ω headphones

🔊24-bit/192kHz HD audio

🔌USB/Optical/Coaxial inputs

HK$1067

Duties & taxes included

In stock

Sold byAmazon Hong KongDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Hong Kong.

Secure transaction

Description

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

PLUG AND PLAY SIMPLICITY - No drivers, no hassle—just instant HiFi sound out of the box, perfect for busy professionals who demand quality and convenience.
COMPACT POWERHOUSE DESIGN - Sleek full-metal chassis fits seamlessly on your desk or entertainment center, combining durability with modern minimalist style.
CUSTOMIZABLE AUDIO TUNING - Fine-tune your sound with premium metal bass and treble knobs for a personalized listening experience that matches your vibe.
AUDIOPHILE GRADE SOUND CLARITY - Experience pristine 24-bit/192kHz high-definition audio that elevates every track to studio-quality brilliance.
SEAMLESS MULTI SOURCE CONNECTIVITY - USB, Optical, and Coaxial inputs let you effortlessly switch between PC, TV, and stereo setups without missing a beat.

The Fosi Audio Q4 is a compact, entry-level DAC and headphone amplifier designed for professionals seeking high-fidelity sound with versatile connectivity. Supporting USB, Optical, and Coaxial inputs, it delivers 24-bit/192kHz HD audio and drives headphones from 16Ω to 200Ω. Its premium metal build includes adjustable bass and treble controls, plug-and-play ease, and comprehensive accessories for immediate setup, making it the perfect upgrade for desktop and home stereo systems.

Specifications

ASIN	B07VDQQY95
Audio Output Mode	Stereo
Best Sellers Rank	#11,053 in Electronics ( See Top 100 in Electronics ) #20 in Headphone Amps #47 in Audio Component Amplifiers
Brand Name	Fosi Audio
Compatible Devices	Amplifier, Headphone, Speaker, Television
Customer Reviews	4.4 4.4 out of 5 stars (3,325)
Included Components	User Guide
Interface	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

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

HK$1067

Duties & taxes included

In stock

Sold byAmazon Hong KongDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Hong Kong.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

View all Trustpilot reviews