US-4x4HR USB Audio MIDI Interface 4xMic / 4xLine / 4-Out

Product Features

• 4 analogue mic/line inputs
• Individual XLR or TRS balanced connectors
• Ultra-low noise -128dB ultra-HDDA mic preamps
• Switchable 48-Volt phantom power on XLR inputs
• 4 audio outputs as well as MIDI interface for Windows, Mac or iOS
• Two headphones outputs delivering 45 mW per channel

Hardware Features

• Four analogue mic/line inputs on individual XLR and TRS balanced connectors
• High-quality Ultra-HDDA (High Definition Discrete Architecture) microphone pre-amps with ultra-low noise (EIN: –128 dBu)
• Wide input gain range of 56 dB, ideal for dynamic microphones
• Switchable 48-Volt phantom power on XLR inputs
• TRS inputs 1/2 can each be switched to instrument-level for direct recording of guitar or bass
• Four line outputs (balanced TRS)
• Direct monitor option for low-latency monitoring
• Monitor mix control for adjusting the level balance between signals from external devices and signals from the computer
• Two headphones outputs delivering 45 mW per channel
• Independent level controls for line and phones outputs
• MIDI input/output
• Standalone operation as a simple preamplifier for practice sessions and more
• Rugged aluminium body
• Angled industrial design for ease-of-use on a desktop

Software Features

• In-house developed driver for Windows devices ensures stable operation with low latency
• The buffer size for Windows can be selected up from 4 samples to facilitate a recording environment with ultra-low latency
• Each input can be switched on/off individually
• Input monitor mode can be selected between stereo and mono
• You can select which signals are output at the line outputs
• A loopback function allows two audio channels from the computer to be merged with the input signals and send this mix to the streaming or communication software
• Input and computer signals can each be selected between stereo and mono
• A slider lets you adjust the broadcast level
• Switchable auto power save mode to reduce battery consumption on the laptop/tablet computer in mobile use
• Automatic update function available for software, driver and firmware updates (you can install new updates with the press of a button)
• Bundled with Cubase LE and Cubasis LE3, IK Multimedia SampleTank 4 SE and Antares Auto-Tune Unlimited (free 3-month subscription)
• Compatible with major DAW software

Product Specifications

Audio Resolution

• Sampling frequencies:  44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, 192 kHz
• Quantization bit depth:  24-bit

Analogue Inputs

• Mic inputs (balanced):  XLR-3-31 equivalent (1: GND, 2: HOT, 3: COLD)
  • Input impedance:  2.2 kΩ
  • Rated input level:  –7 dBu (0.346 Vrms)
  • Maximum input level:  +9 dBu (2.183 Vrms)
  • Gain range:  56 dB
• Instrument inputs (unbalanced, MIC/LINE INST switch set to INST):  6.3-mm standard TS stereo jacks (Tip: HOT, Sleeve: GND)
  • Input impedance:  ≥1 MΩ
  • Rated input level:  –6 dBV (0.501 Vrms)
  • Maximum input level:  +10 dBV (3.162 Vrms)
  • Gain range:  56 dB
• Line inputs (balanced, MIC/LINE INST switch set to MIC/LINE) :  6.3-mm standard TRS stereo jack (Tip: HOT, Ring: COLD, Sleeve: GND)
  • Input impedance:  10 kΩ
  • Rated input level:  +4 dBu (1.228 Vrms)
  • Maximum input level:  +20 dBu (7.75 Vrms)
  • Gain range:  56 dB

Analogue Outputs

• Line outputs (balanced):  6.3-mm standard TRS stereo jacks (Tip: HOT, Ring: COLD, Sleeve: GND)
  • Output impedance:  210 Ω
  • Rated output level:  +4 dBu (1.228 Vrms)
  • Maximum output level:  +20 dBu (7.746 Vrms)
• Headphone output (PHONES) :  6.3-mm standard stereo jack
  • Maximum output power:  45 mW + 45 mW or higher (THD+N 0.1% or less, into 32 Ω load)

Control Inputs/Outputs

• MIDI IN connector:  5-pin DIN
  • Format:  MIDI standard
• MIDI OUT connector:  5-pin DIN
  • Format:  MIDI standard
• USB:  4-pin USB, Type C
  • Transfer rate:  USB 2.0 High Speed (480 MBit/s)

Audio Performance

• Mic amp EIN (equivalent input noise):  ≤−128 dBu (150 Ω termination, GAIN knob at maximum)
• Frequency response, MIC/LINE input
  • 44.1 kHz / 48 kHz:  20 Hz – 20 kHz, +0 dB/−0.4 dB (JEITA)
  • 88.2 kHz / 96 kHz:  20 Hz – 40 kHz, +0 dB/−0.4 dB (JEITA)
• Frequency response, LINE output
  • 44.1 kHz / 48 kHz:  20 Hz – 20 kHz, +0.2 dB/−0.1 dB (JEITA)
  • 88.2 kHz / 96 kHz:  20 Hz – 40 kHz, +0.2 dB/−0.4 dB (JEITA)
• S/N ratio:  
  • 110 dB (MIC input, GAIN knob at minimum, 20-kHz SPCL LPF, A-weighted)
  • 108 dB (LINE input, GAIN knob at minimum, 20-kHz SPCL LPF, A-weighted)
  • 110 dB (LINE output, LINE OUT knob at maximum, 20-kHz SPCL LPF, A-weighted)
• Distortion (THD+N):  
  • 0.0013 % (MIC IN, 1 kHz sine wave, −5 dBFS input, GAIN knob at minimum, 20 kHz SPCL LPF)
  • 0.0011 % (LINE IN, 1 kHz sine wave, −5 dBFS input, GAIN knob at minimum, 20 kHz SPCL LPF)
  • 0.0012 % (LINE OUT, 1 kHz sine wave, −4 dBFS input, LINE OUT knob at maximum, 20 kHz SPCL LPF)
• Crosstalk attenuation:  
  • ≥95 dB (MIC/LINE input to LINE output, 1 kHz sine wave, GAIN knob at minimum)

Computer System Requirements

• Windows
  • Computer hardware requirements:  Windows computer with a USB 2.0 port
  • CPU/processor speed:  2 GHz or faster dual core processor (x86)
  • Memory:  2 GB or more
  • Supported audio drivers:  ASIO2.0, WDM, MIDI

^{Important: Operation of this unit was confirmed using standard computers that meet the above requirements. This does not guarantee operation with all computers that meet the above requirements. Even computers that meet the same system requirements might have processing capabilities that differ according to their settings and other operating conditions}

• macOS
  • CPU/processor speed:  2 GHz or faster dual core processor
  • Memory:  2 GB or more
  • Supported audio drivers:  Core Audio, Core MIDI
• iOS
  • Supported audio drivers:  Core Audio

^{Important: To connect an iOS device that has a Lightning connector, a genuine Apple Lightning to USB Camera Adapter (sold separately) is necessary.}

Power Supply and Other Specifications

• Power Supply
  • When used with a computer:  USB bus power or dedicated AC adapter below
  • When used with an iOS device:  Dedicated AC adapter (Tascam PS-P1220E, DC 12 V)
• Power consumption:  2.25 W
• External dimensions (W × H × D, including protrusions):  296 mm × 65 mm × 160 mm
• Weight:  1.6 kg
• Operating temperature range:  5–35 °C