Based in Texas Audio enginethe brand known for handcrafted home music systems and sound-focused technology launches the HXL: a compact, portable headphone amplifier and DAC that delivers high-fidelity audio on the go. Officially available on October 6, 2025 for $169, it’s “not a dongle,” although… well, it kind of is.
The HXL was designed with a clear mission: to deliver premium headphone performance in a portable, plug-and-play package. Whether you’re mixing tracks, editing audio or just enjoying your favorite album, the HXL delivers clarity, control and headroom typically reserved for much larger devices. No batteries. No complicated setup. No dongles – well, not officially. Simply balanced, high-resolution sound wherever you go.
The HXL connects directly to your phone, tablet or computer via USB-C and draws power from the host device. Inside the CNC-machined aluminum chassis are two CS43131 DACs, a 60-level digital hardware volume control, and 3.5mm single-ended and 4.4mm balanced outputs.
Audioengine HXL: Technical features and performance overview
The Audioengine HXL combines premium headphone amplification and DAC performance in a compact, pocket-sized aluminum body – think of it as a portable powerhouse that could technically pass as a dongle, but don’t call it that. It offers both 3.5mm single-ended and 4.4mm balanced outputs, giving users the flexibility to drive everything from everyday headphones to high-impedance studio models.
At its heart are two CS43131 DACs paired with an SA9312 chipset that can natively handle PCM files up to 32 bit/384 kHz and DSD256, ensuring clean, high-resolution playback.
A 60-level digital hardware volume control is located directly on the device, while a simple LED display shows playback resolution so you can easily tell whether you’re listening to PCM or DSD content.
Its low-noise design, including an external crystal oscillator, low-jitter PLL clock, and carefully regulated power circuitry, ensures an impressively low noise floor (<1 µV), wide frequency response (20 Hz-40 kHz ±0.1 dB), and extremely low distortion (THD+N of 0.0002%).
Output power is generous: the 3.5mm output delivers 2.06Vrms at 600Ω and the 4.4mm balanced output achieves 4.09Vrms, along with an ultra-low output impedance (<0.5Ω) for a tight, controlled sound. The signal-to-noise ratio peaks at 132 dB balanced and 125 dB single-ended, while crosstalk is an impressive -129 dB and -96 dB respectively.
The HXL’s plug-and-play design works on all major operating systems without apps or drivers, and its durable CNC-machined aluminum housing makes it travel-ready for use anywhere – from headphones to powered speakers.
Included in the box is the HXL itself, a USB-C to USB-C cable, a USB-C to Lightning adapter, and a quick start guide – so yes, it’s portable, powerful, and technically a dongle, but don’t tell Audioengine I said that.
The conclusion
The Audioengine HXL is a compact, sophisticated portable headphone amplifier and DAC that punches above its size without pretending to be something it isn’t. Its dual CS43131 DACs, 60-level hardware volume control, and balanced 4.4mm output ensure plenty of headroom, low noise, and high-resolution clarity, suitable for both casual listening and demanding studio work.
The USB-C powered design makes it easy – no batteries, no setup hassles, and yes, technically a dongle, although Audioengine would never call it that.
On the positive side, the HXL offers excellent versatility with single-ended and balanced outputs, wide headphone impedance support (10-600Ω), and a sturdy CNC aluminum chassis that’s truly travel-ready. The LED playback indicators and plug-and-play operation for all major operating systems add to its convenience.
The downside is that there’s no built-in EQ or app integration, and while the 60-step digital volume is precise, it may feel less responsive than a traditional analog control. Compared to competitors like iFi, FiiO, and Questyle, the HXL holds its own in terms of portability and build quality, although audiophiles looking for extreme headroom or ultra-rare features may still gravitate toward higher-end options in these product lines.
Where to buy: $169 at Crutchfield | Amazon | Audio engine
