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D3 24-bit DAC/Headphone Amp (Refurbished)

$99 $79

Factory Refurbished

A portable USB DAC and headphone amplifier for incredible audio performance.

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Product Description

Audioengine D3 Premium 24-bit DAC

Connect D3 to a USB port on your Mac or PC and send high-quality music to your headphones or any audio system. D3 includes a USB DAC and headphone amplifier for incredible audio performance in a portable design and is the perfect intro to computer audio.

The Audioengine D3 Premium 24-bit DAC (digital-to-analog converter) allows you to bypass your computer’s headphone output and send music directly through a USB port for noticeably improved fidelity and a higher output. The D3 is a powerful yet portable converter with performance and features usually found in more expensive DACs and is the perfect interface between your computer and headphones or any music system.

Easy setup

Setup is easy and no special software is needed, making D3 a true plug-and-play solution. The D3 plugs directly into a USB port on your computer so no external power supply or cables are needed. The output of the D3 connects to headphones, Audioengine powered speakers, or any audio system. The D3 also has a sample rate indicator that shows sample rates above 48K so you’ll know you’re getting the most out of your HD music.


The quality of most computer headphone outputs isn’t generally very inspiring, so the D3 provides a better option by streaming audio from your computer’s USB port and directly connecting to your music system or headphones. The D3 DAC is the perfect way to get great-sounding music not only from your computer to headphones but also from your computer to any music system.

Designed for the headphone enthusiast

D3 will process digital audio at any bit depth up to 24 bits and any native sample rate to 96KHz. With its high signal-to-noise ratio and low distortion, the D3 delivers sound quality generally heard only in more expensive DACs. The high-performance headphone amplifier was designed for a wide range of headphones and will satisfy even the most demanding headphone enthusiast with its high output and revealing sound. The D3’s asynchronous data transfer carefully controls USB streaming audio from any computer which greatly improves audio performance.

See and hear the difference

The aluminum case of the D3 reflects traditional Audioengine design and the high-quality components and audio fidelity are typical of Audioengine’s commitment to great sound at affordable prices. The Audioengine D3 continues to close the gap between your computer music and home hi-fi and even if you’re not an audio enthusiast we guarantee your music will sound better!

★★★★★ Support

Need help getting started with your new D3? Here are some resources that will help.


30-day audition

Listen to HD6 for 30 days. Love it, or return it for a full refund.*
*30-day trial is only available for product purchased directly online from the Audioengine store




Portable USB audio converter for Mac or PC
Stream bit-perfect native 24/96 HD audio
High-performance headphone amp included
Plug-and-play, no drivers or software to install
Connect headphones or any music system
Easily drives low impedance headphones
Computer OS volume control
Asynchronous data transfer with dual master clocks
HD indicator for sample rates above 48K
Metal injection molded (MIM) aluminum case

Works with

Works with

Any computer, Mac or PC
Powered speakers
Any music system with audio inputs (RCA or minijack)

What’s in the Box

What’s in the Box (Sender)

Carry case
1/4” headphone adapter cable
Setup guide
Product line brochure

General specifications

General specifications

DAC type

USB audio

D/A converter

USB transfer mode
Asynchronous dual clock

USB controller

USB device class
Type 1.1 or above

Input bit depth
16 bit, 24 bit (upsampled to 24 bit)

Input sample rate
48.1kHz-96kHz native playback
188.2kHz & 192kHz re-sampled to 96kHz

Analog 3.5mm mini-jack stereo

Full-scale output level
2.0V RMS

Output impedance
2 ohms

Recommended headphone impedance range
10 ohms to 10K ohms

Headphone amplifier

Frequency response
10Hz-25KHz (+/- 0.5dB)

(DC to 20kHz) >110dB

(1kHz FS 96kS/s) <0.002%


Power requirement
USB 5V DC, 200mA

USB power filtering
2-stage redundant regulation

Product dimensions
2.5×0.75×0.375″ (65x20x10mm)

Shipping weight
1.0lbs (0.5kg)

Operating Temperature: 32 to 95 degrees F
Non-operating Temp: -4 to 113 degrees F
Relative Humidity: 5% to 95% non-condensing

Included accessories
1/8″ to 1/4” adapter cable
Setup guide
Product case

D3 Internal Converter
The heart of the D3 is the AK4396 DAC, which is well-regarded for its low noise and high fidelity. Due to the high signal-to-noise specs of the AK4396 and the added benefit of double redundancy power source conversion and filtering, the D3 presents impressive low noise and low distortion characteristics. The D3 can process digital audio at any bit depth up to 24 bits and any sample rate up to 192kHz. D3 pads (upsamples) all bit depths internally to 24-bits, thus achieving a higher signal-to-noise ratio.

D3 Headphone Amplifier
The D3 contains a high-performance headphone amplifier based on the LME49726 low-noise opamp. This amp is able to provide low-impedance, high-fidelity audio and a 2-volt output which easily drives a wide range of headphones, satisfying even the most demanding headphone enthusiasts. The D3’s relay-controlled stereo output can also be connected to any system with an analog audio input, such as Audioengine powered speakers.

D3 Power
The D3 is powered directly from the USB bus and power is passed through two stages of regulation to ensure no USB bus power variations affect the audio quality. This low-noise, low-ripple power supply is located on a separate circuit board for extra isolation and thermal management.

D3 Volume Control
Volume is controlled from the computer’s OS and is implemented in the D3 as a digitally-controlled analog volume control.

Mac Edition Radio – D3 Review

“Contrasting the D3 to the Cambridge Audio DAC MagicXS, the HRT MicroStreamer, and the DragonFly…, the D3 was warmer, and musical to our ears, non-fatiguing, and consistently enjoyable.”
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Small Spaces Audio – D3 Review

“There is so much to like about the D3; the solid construction, tight fit, and most of all, a comfortable musicality.”
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Sound&Vision – D3 Review

S&V “Top Pick of the Year” – “If you’re looking for the easiest, cheapest way to make computer audio sound great through headphones, this is it.”
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Headfonia – D3 Review

“It’s hard not to be impressed by the D3. It’s small. It’s done up in brushed aluminum. It’s powerful.”
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Headphonics – D3 Review

“More than enough power for most cans and high impedance headphones and a nice analog natural sound that really made the old classics sound authentic and appealing.”
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HardwareCanucks – D3 Review

AudioMatters – D3 Review

“I don’t care for ‘Best of the Year’ awards but if pushed, I’d have to give this one for most value.”
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SF Classical Voice – D3 Review

“Virtually the same size as the Audioquest DragonFly, (D3) is just as convenient and sounds better…”
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View PDF – D3 Review

“The D3 sounds amazing. The main selling point is its portability and it knocks that out of the park.”
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The Absolute Sound – D3 Review

“The D3 DAC did exactly what it’s supposed to do – make digital audio sound great. At $189, the D3 DAC is a must-have…”
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Hardware BBQ – D3 Review

“…the performance of the D3 is exceptional given its diminutive size and power output that can drive almost any headphone out there.”
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Hype Review – D3 Review

“The Audioengine D3 isn’t the cheapest DAC you can get, but it offers very good audio performance in a very refined package.”
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CNET – D3 Review

“This affordable component can radically upgrade your computer’s sound quality.”
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Stereophile – D3 Review

“Right out of the box, the Audioengine D3 delivered a big, bold, pleasantly forward sound.”

The Street – D3 Review

“What does set the D3 apart from the competition is the sound. I found the Audioengine to sound terrific…”
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TUAW – D3 Review

The D3 wins TUAW Editor’s Choice awards for Best Mac Accessory
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Truly Gadgets – D3 Review

“…the Audioengine D3 is about the size of a thumb drive, plus in via USB, and makes your system sounds like it just had a major upgrade.”
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Computer Audiophile – D3 Review

“Audioengine has hit their mark with the D3. A good price, great delivery and well kempt sound quality round out the tiny package for the computer desktop junkie and budget audiophile alike.”
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PC Magazine – D3 Review

“…the Audioengine D3 can be a solid addition to your audio arsenal.”
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View PDF – D3 Review

“…the Audioengine D3 produces the best sound of any of the mini-DACs I’ve heard to date. It’s easy to carry everywhere in the tiny pouch that comes with it, and the price is no higher than many DACs that don’t sound as good. Highly recommended!”
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TUAW – D3 Review

“If you want the best quality from your digital files, the Audioengine D3 is worth serious consideration.”
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