Think about socks-knocked-off levels of audio power and you probably picture a towering speaker stack, not a music player so dinky it’ll fit in your pocket – but Astell&Kern sees things differently. Its Android-powered Kann Max cranks up the output to a frankly bonkers 15Vrms – that’s a measure of voltage that means it can drive pretty much any headphones without external amplification – with 64GB of storage (plus microSD) to fill with hi-res audio at up to 32-bit/768kHz. There’s Wi-Fi support to make transferring your tunes to the player that bit simpler, and the battery should last 13hrs between charges. Best of all? Its name sounds like an obscure German techno DJ. £1199 / astellkern.co.uk