AudioQuest DragonFly Copper: The Next Chapter in a Category-Defining DAC

Company & Product Overview

Before we get into what's new, let's cover what a DragonFly actually is, since not everyone reading this will already know. The DragonFly Copper is a USB DAC (digital-to-analog converter), preamplifier, and headphone amplifier, all built into a small dongle about the size of a USB flash drive. In plain terms, it takes over the job of converting digital music into an analog signal from whatever cheap, compromised chip is already inside your laptop, phone, or tablet, and does that conversion far better. It also adds real amplification power to drive good headphones properly, something most built-in headphone jacks simply can't do well. Plug it into a USB port, connect your headphones or a cable to your speakers or amp, and the sound coming out the other end is noticeably cleaner, more detailed, and more powerful than what that same device could produce on its own.

At Audio Advice, we have been fans of AudioQuest products for almost 40 years. Bill Lowe, the founder of AudioQuest, is a huge music lover who constantly pushes the AudioQuest team to innovate to improve sound. It's been seven years since AudioQuest last refreshed its flagship portable DAC lineup, and the wait is finally over with the arrival of the DragonFly Copper.

If you've followed the DragonFly story, you know it started back in 2012 with a single, computer-only USB stick that helped create the entire "dongle DAC" category, followed by a revised v1.2 in 2014. The Black and Red arrived together in 2016 with smartphone compatibility, and the Cobalt followed in 2019 as the flagship of the line. Since then, more than 300,000 DragonFlies have found their way into music lovers' bags and desktops around the world.

Designer Gordon Rankin, the same engineer behind every DragonFly to date, had Copper development underway before COVID brought everything to a halt. Now, seven years after Cobalt, Copper picks up where that development left off, into a personal audio market that looks very different than it did in 2019. iFi, FiiO, Astell&Kern, and several other companies now build their own dongle DAC/amps, chasing the same goal of improving on-the-go sound. AudioQuest is betting that Copper's combination of engineering pedigree and that signature "naturally beautiful" DragonFly sound still has a place in that crowded field. AudioQuest has already discontinued the Black and Red, and dropped Cobalt's price now that Copper is the flagship. Add in the fact that Copper's selling price is less than Cobalt's was in 2019, and we think they have another winner on their hands.

Design & Build Quality

Like every DragonFly before it, the Copper looks like a slightly oversized USB stick. It plugs directly into a USB-A port, with an included DragonTail USB-C adaptor in the box for phones, tablets, and modern laptops. There's no power cord to worry about. It draws its power straight from the USB connection, and according to AudioQuest, Copper draws 25% less current from its source than Cobalt did, which should be welcome news for anyone running it from a phone battery.

The headline design change is right there in the name. Copper's case is copper-plated, and according to AudioQuest's engineering team, that wasn't a cosmetic decision made after the fact. The material was chosen specifically for its RF-noise-draining properties, borrowing design thinking from the RF-draining barrels used in AudioQuest's Mythical Creatures interconnect line. Copper conducts radio-frequency noise away from the signal path more effectively than the polymer, brass, zinc, or aluminum previously used across the DragonFly family, and the name followed the material choice rather than the other way around.

Practically speaking, Copper measures a compact 2.24 × 0.75 × 0.47 inches (19mm W x 12mm H x 57mm L), keeping it just as pocketable as its predecessors, and the familiar color-coded logo returns to show you sample rate at a glance: red for standby, green for 44.1kHz, blue for 48kHz, yellow for 88.2kHz, and light blue for 96kHz.

Features & Technology

Copper is built around a new ESS Sabre ES9218 chip, a 32-bit integrated DAC and headphone amplifier. Compared to the outgoing Cobalt, AudioQuest says Copper delivers twice the headphone output power of any previous DragonFly while measuring as the quietest (lowest distortion) model the company has built. It still outputs 2.1 volts from its analog headphone/preamp jack, enough to comfortably drive a wide range of headphones and to feed directly into a power amp or a pair of powered speakers, just like the Cobalt before it.

True to AudioQuest's long-standing philosophy for this product line, Copper deliberately caps out at 24-bit/96kHz over "Full Speed" USB rather than chasing the ultra-high-resolution specs some competitors advertise. AudioQuest has always treated this as a considered engineering choice rather than a limitation, prioritizing implementation quality over spec-sheet numbers. Copper handles MP3, AAC, FLAC, ALAC, WAV, and Hi-Res files.

One nice bit of continuity for existing AudioQuest owners: Copper is compatible with the JitterBug USB noise filter used in series or in parallel, a pairing that wasn't always ideal with Cobalt since that model had already built in similar filtering internally. Copper works with Windows, Mac, iOS, and Android without additional drivers, meeting standard USB Audio Class specs. It also works with Linux, though AudioQuest doesn't officially support that platform or publish specs for it. Like every DragonFly, volume is controlled from your source device rather than the DAC itself.

Where Copper Fits In Your System

One of the best things about a DragonFly is how many different ways you can put it to use. A few of the most common:

On the go. Plug Copper into your phone or laptop with a good pair of headphones, and you get a real upgrade over the built-in headphone output almost anywhere: on a flight, at a coffee shop, or just at your desk during the workday.

Feeding powered speakers. Copper's 2.1-volt output is strong enough to run directly into a pair of good powered desktop or bookshelf speakers, skipping right past your computer's weak internal sound card entirely. This is one of the simplest ways to dramatically improve a desktop or work-from-home listening setup without buying a separate amplifier.

Laptop into an integrated amp. If you've got a real stereo system with an integrated amp, Copper is an easy way to use your laptop as a serious source. Run Copper from a USB port into an open analog input on your integrated amp, and you've turned your laptop's music library or streaming service into genuine hi-fi source material.

A few other places it earns its keep: connected to a home theater receiver's analog input to clean up sound from a laptop or tablet during a movie night; paired with a portable DAP or phone for higher-resolution streaming from services like Tidal or Qobuz while traveling; or simply left plugged into a home office computer as a permanent, always-better replacement for the built-in audio jack.

Setup Tips for Best Sound

A few setup details make a real difference with Copper, and they're easy to miss.

Windows: After plugging in Copper, open the Sound control panel and set "AudioQuest DragonFly Copper v1.0" as your default device. In Properties, disable all Enhancements, set the Advanced default format to 24-bit, 44100 Hz, and check Exclusive Mode for both options. Turn Spatial sound off too, or Windows resamples the signal before it reaches the DAC.

Mac: In System Settings > Sound, select DragonFly as your output, and route sound effects to your internal speakers so notification dings don't come through your headphones at full volume. For more control over sample rate, Audio MIDI Setup (Applications > Utilities) lets you select it directly.

Mobile: Drop your device volume to around 50% before opening a music app, since Copper's preamp adds real amplification on top of whatever the phone is already doing. If Copper still sounds quiet on an Android device afterward, that's usually a hardware issue rather than a setup mistake: some Android phones don't fully follow the USB Audio Class spec, and AudioQuest recommends the USB Audio Player Pro app as a fix.

Performance

Here's how it sounds. What surprised me most about Copper is that the extra clarity doesn't come from pushing the top end forward. It sounds a little richer than Cobalt to me. There's more weight behind the music, especially through the bass and lower midrange, but at the same time everything feels easier to separate. On a dense track, individual instruments are more clearly defined instead of competing for the same space.

That was the biggest difference I heard going back and forth with Cobalt. Copper gives the presentation more room to breathe. The soundstage feels wider and more organized, and it's easier to tell where things are sitting within it. Vocals have plenty of presence without jumping too far forward, and instruments have more body without making the overall sound feel thick.

The added power is noticeable too, particularly in the low end. Copper feels more confident driving headphones, with bass that hits harder but also stops and starts more cleanly. It's not just a volume difference. There's more punch behind drums, more definition in bass lines, and bigger dynamic swings land harder.

Up top, Copper stays relaxed. There's still plenty of detail and you can hear texture in cymbals and higher frequencies, but it doesn't try to impress you by making everything brighter. You can listen for a long time without the presentation getting tiring.

Copper sounds more refined than Cobalt, not radically different. It still has that smooth, easygoing DragonFly character, but there's more power behind it, better definition throughout the low end, and a bigger, more organized presentation. Cobalt is still very good, but going back and forth, Copper sounds like the more complete DAC.

Overall Recommendation

At $250, Copper makes the most sense for someone who wants good headphone and two-channel sound without another battery, screen, app, or box to carry around. You plug it in, select it as your audio output, and you're done.

If you already own Cobalt, I wouldn't say Copper suddenly makes it obsolete. But Copper does sound like the more capable product. Whether that's worth replacing a Cobalt you already own depends on your headphones and how often you use it. If you're coming from an older DragonFly Black or Red, both of which AudioQuest has now discontinued, or you've never owned one at all, Copper is a much easier recommendation. AudioQuest built its new flagship with more power and less noise, and launched it fifty dollars under Cobalt's original price.

We’re Here to Help!

If you have further questions, contact our experts via chat, phone, or email. Or simply visit one of our world-class showrooms to experience speakers, projectors, TVs, and everything in between for yourself before you make a purchase!

If you’re planning your home theater or media room, check out our Home Theater Design page, where we have everything Home Theater related, including our FREE Home Theater Design Tool.

When you buy from Audio Advice, you’re buying from a trusted seller since 1978. We offer Free Shipping, Lifetime Expert Support, and our Price Guarantee. We look forward to serving you!