One of the most professional studio-level USB audio interfaces of Focusrite company is Scarlett 18i20 – device with 18 audio inputs and 20 outputs with support of 96 kHz and 24 bits mode. On its frontal panel following are placed : 2 combined XLR/TRS 1/4″ jack microphone/linear/instrumental Hi-Z inputs; phantom power +48 V switch for inputs 1 – 4 with indicator and the same for inputs 5 – 8; gain control knob, instrumental mode and PAD switches with indicators for inputs 1 and 2; gain control knobs for inputs 3 – 8; screen with outputs’ levels indication and USB signal and locking indicators; volume control knob and Direct Monitor and mute switches with activity indicators; 2 independent TRS 1/4″ jack outputs for monitor headphones with volume controls; and power on switch button with indicator. On back panel there are : line power input ( power from USB or adapter is not enough for interface ); digital coaxial S/PDIF input and output; MIDI input and output; USB 2.0 port; clock signal synchronization port; digital optical ADAT input and output; 10 analogue TRS 1/4″ jack outputs ( 1 and 2 are balanced ); and 6 combined XLR/TRS 1/4″ jack inputs.
To all combined analogue inputs of Focusrite Scarlett 18i20 preamplifiers Focusrite are connected. Device has following characteristics : dynamic range of analogue to digital conversions is 109 dB; digital to analogue 108 dB; microphone inputs ( THD+N 0.001 %, noise level -122 dB ); linear inputs ( THD+N 0.007 %, noise level -105 dB, maximal input signal level +28 dB ); instrumental inputs ( THD+N 0.007 %, noise level -103 dB, maximal input level +8 dB ); analogue linear outputs ( maximal output level +16 dB, THD+N 0.001 % ). Fore device drivers are released for Windows Vista, 7, 8, 8.1 and 10 and Mac OS X 10.8 Mountain Lion OSes with support of ASIO 2.0 and Core Audio interfaces, accordingly, through which it works with modern DAWs : FL Studio, Cackewalk Sonar, REAPER, Avid Pro Tools, Ableton Live, Steinberg Cubase and others. Device sizes are : 482 ( width ) x 265 ( depth ) x 45 ( height ) mm and mass is 3.4 kg. Following programs are bundled with device : DAW Ableton Live Lite, mixer Scarlett MixControl, Scarlett Plug-in Suite ( VST/AU/RTAS versions of compressor, reverberation, gating and equalizer ), AU/VST digital version of analogue synthesizer Novation Bass Station and 1 GB of free samples Loopmasters.
Package contains : Focusrite Scarlett 18i20 USB audio interface itself, USB cable, power cable, optical disks with drivers and software, warranty card and user’s guide. Interface is very professional, has large amount of connectors and functions and is designed for use in large studios, for them – it is one of the best devices. For small studios such amount of connectors is not needed and there is ability to buy devices with smaller price and the same level of quality of internal components of Steinberg, Behringer, Focusrite itself, Roland, ESI, M-Audio and other manufacturers production.