Do the can KANN – You can with Astell&Kern's new KANN Ultra [€1'899], a canister full of 16Vrms go juice and 8'400mAh lasting power. Add 5.5" display, crossfeed, four gain settings and dedicated 3.5/4.4mm line outputs preceded by their own preamp stage to not tap into the headphone leg and its processing. Conversion is by dual ES9039MPro chips for 32/768 PCM and DSD512 readiness. Octa-core processors promise rapid GUI response and headphones plug into either 3.5mm or 4.4mm ports. Built-in storage is 128GB and the microSD slot can host up to 1TB. There's also USB-C and WiFi/Bluetooth v5.3.