Esoteric of Japan have just released a one-box system, the RZ-1. In common with many others of its type, this slimline system, only 77mm tall, relies on a single toroidal transformer to provide power to the 100watt class D amplifier modules, the analogue preamp, and the CD/SACD player (with its 32-bit Asahi AK4392 DAC and two user-selectable filter settings). Alongside the USB, co-axial and TOSLink digital inputs, there are two analogue inputs, one switchable to moving magnet phono.