Product Information: TASCAM’s Celesonic US-20x20 packs 20 channels  of analog and digital I/O into a single rackspace with great sounding preamps  and USB 3.0/2.0 connectivity. Eight Ultra-HDDA microphone preamps provide 56dB  of gain and high headroom to make microphones sound their best. Up to ten  channels of digital I/O are included on ADAT and S/PDIF connectors, with word  clock also provided for use with external clocks like TASCAM’s CG-1000. MIDI I/O  allows use with controllers and synthesizers, and sample rates up to  192kHz/24-bit are supported.The TASCAM Celesonic US-20x20 is the first USB 3.0 interface to use  class-compliant drivers for future-proof use with computers and tablets. A  built-in DSP mixer includes parametric EQ and compression on every channel and a  stereo reverb send for great-sounding monitor mixes. The DSP mixer can also be  used as a live mixer or submixer with computer control. The US-20x20 has three  operation modes – audio interface, digital mixer, and 8-channel digital mic  preamp –for maximum flexibility.

Specifications:

US-16x08 US-20x20
Sampling frequency
USB2.0 44.1k/48k/88.2k/96k Hz
USB3.0 - 44.1k/48k/88.2k/96k/176.4k/192k Hz
Quantization bit rate 16/24bit
Analog audio inputs
(Front)
MIC IN (BALANCED) IN 1-8
Connector XLR-3-31(1:GND, 2:HOT, 3:COLD)
Input impedance 2.4k ohms
Nominal input level
GAIN:MAX -68dBu (0.0003Vrms)
GAIN:MIN -12dBu (0.195Vrms)
Maximum input level +8dBu (1.947Vrms)
Gain 56dB
INST IN (UNBALANCED) IN 9-10 IN 1-2
Connector 6.3mm(1/4") TS-jack(T:HOT, S:GND)
(When set to "INST" at LINE/INST switch)
Input impedance 1M ohms or more
Nominal input level
GAIN:MAX -57dBV (0.0014Vrms) -68dBV (0.0004Vrms)
GAIN:MIN -12dBV (0.251Vrms)
Maximum input level +8dBV (0.2512Vrms)
Gain 45dB 56dB
LINE IN (BALANCED) IN 9-10
(When set to "LINE" at LINE/INST switch) IN 3-8
Connector 6.3mm(1/4") TRS-jack(T:HOT, R:COLD, S:GND)
Input impedance 10k ohms
Nominal input level
GAIN:MAX -41dBu (0.0069Vrms)
GAIN:MIN +4dBu (1.228Vrms)
Maximum input level +24dBu (12.282Vrms)
Gain 45dB 56dB
Analog audio inputs
(Rear)
LINE IN (UNBALANCED) IN 11-16 IN 9-10
Connector 6.3mm(1/4") TS-jack(T:HOT, S:GND)
(When set to "-10dBV" at LEVEL switch)
Input impedance 10k ohms or more
Nominal input level -10dBV (0.3162Vrms)
Maximum input level +10dBV (3.162Vrms)
LINE IN (BALANCED) IN 11-16 IN 9-10
Connector 6.3mm(1/4") TRS-jack(T:HOT, R:COLD, S:GND)
(When set to "+4dBu" at LEVEL switch)
Input impedance 10k ohms
Nominal input level +4dBu (1.228Vrms)
Maximum input level +24dBu (12.1282Vrms)
Digital audio inputs
COAXIAL
Connector - RCA pin jack
Format - IEC60958-3(S/PDIF)
Input impedance - 75 ohm
Input level - 0.5Vp-p / 75 ohm
OPTICAL (S/MUX)
Connector - OPTICAL (JEITA RC-5720C)
Format - Multi-channel optical format
(S/MUX4 is available in 88.2k/96k/176.4k/192k Hz)
Analog audio outputs
LINE OUT (BALANCED) OUT 1-8 OUT 1-10
Connector 6.3mm(1/4") TRS-jack(T:HOT, R:COLD, S:GND)
Output impedance 100ohms
Nominal output level +4dBu (1.228Vrms)
Maximum output level +24dBu (12.277Vrms)
Digital audio outputs
COAXIAL
Connector - RCA pin jack
Format - IEC60958-3(S/PDIF) / IEC60958-4(AES/EBU)
Input impedance - 75 ohm
Input level - 0.5Vp-p / 75 ohm
OPTICAL (S/MUX)
Connector - OPTICAL (JEITA RC-5720C)
Format - Multi-channel optical format
(S/MUX4 is available in 88.2k/96k/176.4k/192k Hz)
MIDI IN / OUT
Connector Din 5-pin
Format Standard MIDI format
WORD IN
Connector - BNC
Permissible frequency deviation at the time of external synchronization
Input voltage - 2.0Vpp to 5.0Vpp
Input impedance - 75 ohm +/-10%
Input level - +/-100ppm
WORD OUT
Connector - BNC
with OUT/THRU select switch
Output voltage - 2.0Vpp (75ohm loaded)
Output impedance - 75 ohm +/-10%
Sampling frequency - 44.1k/48k/88.2k/96k/176.4k/192k Hz
USB
Connector USB B type 4-pin USB3.0/2.0 B type
Format USB2.0 HIGH SPEED mass storage class USB3.0 SuperSpeed (5Gbps)/USB2.0  HIGH SPEED (480Mbps)
PHONES
Connector 6.3mm(1/4") stereo phone jack
Maximum output level 70mW+70mW or more (THD+N 0.1% or less, 32ohms loaded)
Power Dedicated AC adapter (GPE248-120200-Z, included)
Power consumption 12W 20W
Dimensions 52(W) ×2.32(H) ×8.62(D) inch
445(W) ×59(H) ×219(D) mm 52(W) ×2.32(H) ×8.7(D) inch
445(W) ×59(H) ×222(D) mm
Weight 2.8kg / 6.11lb 2.7kg / 5.95lb
Operating temperature 5 to 35˚C
Accessories Rack mount adapter, USB cable, User's manual, warranty card,  dedicated AC adapter (GPE248-120200-Z) Rack mount adapter, USB2.0 cable, USB3.0  cable, User’s manual, warranty card, dedicated AC adapterAudio performance
Frequency response
LINE OUT(BALANCED)
44.1k/48k Hz 20Hz to 20kHz, +/-0.3dB(JEITA)
88.2k/96k Hz 20Hz to 40kHz, +/-0.3dB(JEITA)
176.4k/192k Hz - 20H to 80kHz、+/-0.5dB(JEITA)
THD 0.008% or less 0.005% or less
S/N ratio 100dB or more 104dB or more
Crosstalk 100dB or moreComputer system requirements
Windows
OS Windows 7(32-bit SP1, 64-bit SP1), Windows 8.0(32-bit, 64-bit), Windows  8.1(32-bit, 64-bit) Windows 7(32-bit SP1, 64-bit SP1), Windows 8.0(32-bit,  64-bit), Windows 8.1(32-bit, 64-bit), Windows 10(32-bit, 64-bit)
Compatible computers Windows-compatible computer with a USB 2.0 port  Windows-compatible computer with a USB 2.0 or USB3.0 port
CPU type/speed Dual core/2 GHz or faster
Memory 2GB or more
DRIVER ASIO2.0, WDM(MME), MIDI USB Audio Class 2.0, ASIO2.0, WDM(MME), MIDINote: When using WDM driver, number of output channels from an application has  limitation less than 8 channels.
Screen resolution 1280 x 800 Dot or more
Macintosh
OS OS X Mountain Lion(10.8), OS X Mavericks(10.9), OS X Yosemite(10.10)Compatible computers Apple Mac computer with a USB 2.0 port Apple Mac computer  with a USB 2.0 or USB3.0 port
CPU type/speed Dual core/2 GHz or faster
Memory 2GB or more
DRIVER Core Audio, Core MIDI
Screen resolution 1280 x 800 Dot or more
iOS
OS iOS 7