Portable DACs are designed to slot easily into a bag or pocket, connecting between your phone or laptop and your headphones to bypass the device's often basic internal audio circuitry. For anyone using higher-quality headphones or in-ear monitors, a portable DAC can deliver a genuinely noticeable improvement in detail, dynamics and volume headroom compared with a smartphone's built-in output.

Many portable DACs include their own built-in headphone amplifier stage as well, providing cleaner power delivery and better control over demanding headphones than a phone alone can typically manage. Battery life and compact size are key considerations for this category, since the whole point is convenient, on-the-go use without adding significant bulk to your daily carry.

If you've invested in a good pair of headphones but feel your phone isn't doing them justice, a portable DAC is one of the simplest and most effective ways to unlock noticeably better sound quality while travelling or commuting.