High Resolution Audio USB-DAC and Headphone Amplifier

Features - DA-300USB


As more and more music lovers consider their personal computer or laptop as their principal audio source, they find that the sound quality they're getting simply isn't on par with what a premium component music system can deliver.

Denon's DA-300USB combination D/A converter and headphone amplifier elevates computer-sourced digital audio tracks to purist audiophile levels, delivering superb sound quality without compromise.

Equipped with a range of advanced digital technologies, the DA-300USB connects via asynchronous USB to the computer and features the ability to decode both PCM (traditional digital audio format) and DSD (Direct Stream Digital - the advanced digital audio format of SACD).

For connection to other digital audio sources, the DA-300USB also features three digital audio inputs - two optical and one coaxial.

Featuring audiophile grade construction with highest quality component parts and circuit design, the DA-300USB delivers a level of sound quality on par with Denon's highly praised universal disc players.



At the heart of the DA-300USB is the high resolution PCM1795 D/A converter, which features advanced segment 32 bit architecture along with the ability to handle up to 192kHz PCM sample rates as well as the ability to decode both 2.5Mhz and 5.6Mhz high resolution DSD files (either natively decoded or via DoP - DSD over PCM).

Via the USB-B port, the DA-300USB communicates with the PC or Mac via asynchronous data transfer mode, which ensures smooth, jitter-free digital communication, which is especially vital with very high bandwidth digital audio datastreams. For optimum compatibility with the broadest range of sampling frequencies, the DA-300USB is equipped with two master clock crystals, instead of the usual one.

For the widest dynamic range and lowest distortion, the DA-300USB features sophisticated digital signal processing, including Denon's exclusive Advanced AL32 processor that delivers vastly improved detail especially through the critical midrange band, providing noticeable improvements in clarity with low level softer sounds.


Grade Design

Housed in a sleek casing, the DA-300USB features no less than 7 separate printed circuit boards, to ensure the highest isolation between circuit blocks. Powered by a 15V/1A AC adapter, the DA-300USB features sophisticated DC power conversion technology with a power block that delivers separate DC voltage sources to power the various stages.

To ensure the most stable and accurate digital audio and timing data at the critical D/A converter stage, the DA-300USB also features advanced isolator chips that combine high speed CMOS technology with unique on-chip micro air-core transformers. A total of 9 isolator chips are employed, with 18 channels of isolation, delivering superior common mode noise rejection and maximum protection against digital noise transfer between critical stages, compared to conventional optoisolators.


Wide Range

of Connection Options

The asynchronous USB-B port connects to your computer's USB-A port. Once connected, the computer recognizes the DA-300USB and routes the digital audio data to it, bypassing the source device's internal audio circuitry.

For connection to other sources, the DA-300USB features 3 digital audio inputs - two optical and one coaxial - so you can enjoy greatly improved sound quality from your HDTV, satellite or cable box, game console or disc player.

The line level output connectors are high quality, with full 2Vrms output for compatibility with integrated amplifiers, pre-amplifiers and other analog audio components.

The front panel headphone jack features a standard-sized 6.3mm/¼" connector, along with a convenient volume control.


High Performance


For the purest audiophile grade sound quality, the DA-300USB is equipped with separate audio output circuits for the line level outputs and the headphone output. The headphone amplifier block features dedicated buffer and gain stages, and is compatible with the widest range of headphone types, including low impedance models.

Advanced OLED Display

with Touch Control

The elegant front panel features an advanced OLED display that provides clear indication of the input selected, along with the audio file type (PCM, DSD), the sampling frequency and the headphone volume level. The Touch Control lets you easily cycle through the various modes.

Vertical & Horizontal Mounting


You can choose to mount the DA-300USB either vertically or horizontally, depending upon your equipment configuration. An internal sensor detects the chosen orientation, and rotates the OLED display data accordingly. A custom bottom plate is provided for vertical orientation.


Specs - DA-300USB


Downloads - DA-300USB

pdf file
DA-300USB - Instruction Manual EN

2.43 MB

pdf file
DA-300USB - Quick Start Guide EN

1.79 MB

pdf file
DA-300USB - Product Information Sheet EN

0.81 MB

pdf file
USB-DAC Driver PC Ver. 2.0.2

3.72 MB

pdf file
USB-DAC Driver for Windows 10

4.39 MB

Reviews And Awards - DA-300USB

HI-FI NEWS - "Outstanding Product"

"Clear-cut though you'd like this to be, Denon versus NAD is not an issue easy to resolve. The almost identically sized NAD is £70 dearer, but you get balanced outputs and one more input. The Denon is better-looking, nicer to use and just as clever. Am I copping out? Maybe: I have the NAD on my desk, but will sorely miss the Denon. I'm just glad I don't have to choose between 'em. It's as close as Coke and Pepsi."

T3 - "Best DAC to buy 2014"

"A Corker" - Best DAC to buy in 2014 Roundup

To read the full review please click here.

Telegraph "Best"

"Denon oozes class, and thanks to some high end components, it has the sound to match"

To read the full  online review please click here.

What Hi-Fi - "Denon DA-300 USB What Hi-Fi Four Stars"

"Well made product; detailed, composed performance; DSD compatibility; great headphone amp"


"Great first DAC from Denon, if on the over-friendly side"

Comparison - DA-300USB



  • Advanced AL32 Processing

    Advanced AL32 Processing, the new generation of the Alpha processor. It is capable of digital signals to expand not only in the resolution to 32 bits, but also leads an upsampling of the digital signals by up to 192 kHz.

    The Alpha processor suppresses quantization and disturbing are the finest musical nuances, even in extremely quiet passages of music, again, of course. Thus, for example as well as conventional 16-bit CDs in 32-bit quality of service and with an extended frequency range kHz up to 80. The downstream high-quality 32-bit, 192 kHz-D/A-Wandler the latest generation ensure the faithful conversion of the signals in the analog world.

    Advanced AL32 Processing The variation in multi-channel multi-channel devices to work simultaneously for all channels and smoother in operation for multi-fidelity sound reproduction.


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