The Campfire Audio Relay is a compact and high-performance portable USB-C DAC/amplifier designed to elevate audio playback from smartphones, tablets, laptops, and other digital sources. Converting digital signals to analog with precision, this device delivers clear, detailed sound across a wide frequency range, making it suitable for both casual listeners and discerning audiophiles seeking an improvement over built-in headphone outputs. The unit’s lightweight aluminum housing provides durability while minimizing bulk, ensuring it pairs easily with on-the-go setups without adding unnecessary weight. At the heart of the Relay lies a dedicated digital-to-analog converter chip that processes high-resolution audio streams up to 32-bit/384kHz, supporting PCM and DSD formats for accurate reproduction.

An integrated amplifier stage then drives a variety of wired headphones and earphones, from low-impedance in-ear monitors to moderately demanding over-ear models, with stable output and low noise floor. The USB-C connection ensures broad compatibility with modern devices, including Android phones, Windows PCs, Macs, and tablets that support OTG or USB audio class 2.0. No external battery is required, as the Relay draws power directly from the host device, simplifying the listening experience. Construction quality reflects Campfire Audio’s attention to detail: the casing is machined from solid aluminum with a matte finish that resists fingerprints and scratches, and the USB-C port is reinforced for long-term reliability.

The relay also features a short, flexible cable that reduces strain on the connected device’s port while minimizing tangling. Its compact form factor—roughly the size of a standard thumb drive—fits easily into a pocket or small pouch, making it a practical companion for daily commuting or travel. Performance-wise, the Relay delivers a clean, neutral signature that preserves the original character of recordings without coloration.

The amplifier section provides sufficient gain to achieve comfortable listening levels with most portable headphones, while maintaining low distortion and minimal background hiss. This makes it an effective upgrade for users who notice limited headroom or muddiness from their device’s built-in audio output. The unit operates plug-and-play on compatible systems, requiring no drivers or additional software for standard playback.

Priced at $33.58, the Campfire Audio Relay offers an accessible entry point into high-fidelity portable audio. Its combination of robust build, broad codec support, and effortless connectivity positions it as a practical solution for anyone wanting to extract better sound from their digital library without investing in bulky or expensive equipment. Whether used at a desk, on a train, or during a walk, this small DAC/amp consistently provides a noticeable improvement in clarity and detail.