One of the smallest devices of ESI company is a Dr. DAC nano – USB audio interface for analogue signal output or conversion into digital optical with support of 96 kHz and 24 bits per sample work modes. On frontal panel of device there is combined 1/8″ mini jack connector for analogue or digital optical S/PDIF signals output; on back panel there is Mini USB port for connection with computer and powering. In interface there are : DAC AKM AK4421 with support of 192 kHz and 24 bits internal work mode and 103 dB dynamic range; headphones amplifier Analog Devices AD8397; and solid tantalum electrolytic capacitors. Device works in Windows XP, Vista, 7, 8, 8.1 and 10 and Mac OS X without additional drivers with Plug and Play, also for it drivers are released for Windows with support of ASIO 2.0 interface, via which it can work with modern DAWs : FL Studio, Cackewalk Sonar, REAPER, Avid Pro Tools, Ableton Live, Steinberg Cubase and others.
ESI Dr. DAC nano can power headphones with 16 – 300 Ohms impedance; its sizes are 60 ( depth ) x 45 ( width ) x 17 ( height ) mm. Package contains : ESI Dr. DAC nano audio interface itself, USB cable, warranty card and user’s guide. For its purposes interface is very good, if it is bought only for compact high-quality audio playback or conversion into digital optical signal; but if it is bought for other purposes also, then it is better to add not big amount of money and buy entry-level studio audio interface of Steinberg, Behringer, Focusrite, Roland, ESI itself, M-Audio or other manufacturers production.