Metric Halo ULN-8 3d USB Type-C High-Resolution Audio Interface

Metric Halo ULN-8 3d USB Type-C High-Resolution Audio Interface

Simply the best of everything. USB Type-C High-Resolution Audio Interface with 8 Preamps & DSP To regard the ULN-8 as merely a world-class audio interface (which it...

Vendor :Metric Halo

Type :Audio Interface

Sold Out

Simply the best of everything. USB Type-C High-Resolution Audio Interface with 8 Preamps & DSP

To regard the ULN-8 as merely a world-class audio interface (which it surely is), would be to greatly underestimate it.

The ULN-8 is the hub of my studio, and I can't imagine going back to recording or mixing without it. The ULN-8 is a fantastic monitor controller - it is 8 superb microphone preamps - it is a pair of excellent DI boxes, a hi-res mixer with DSP processing (which has nearly replaced my use of Waves, MOTU and other plugins), and a location recording system. Combined with the MIO Console software, the whole is far greater than the sum of its parts, and with Metric Halo behind it I know it will continue to grow in power, and to evade obsolescence for many years.

Each ULN-8 3d integrates:

  • Mastering grade A/D Conversion (8 channels)
  • Mastering grade D/A Conversion with analog domain monitor control (8 channels)
  • Mastering grade headphone output with dedicated D/A Conversion
  • MH ULN-R preamps (8 channels)
  • Exceptional ultra-high impedance Guitar/Bass DI inputs (2 channels; shared with Analog 1+2)
  • AES I/O (8 Channels)
  • All I/O supports 192k
  • MIDI I/O
  • 128 Channel x 64 bus mixer (up to 192k)
  • Instantiable DSP processing with over 100 plugins
  • Integrated analog domain surround-capable Monitor Controller
  • Incredibly accurate DPLL clock with ultra-low jitter
  • Seamless hardware multi-unit unification over MHLink (mixer, routing and transport)
  • MH EdgeBus Card slot with support for AES/SPDIF/MADI/ADAT/TOSLINK/MIDI (depending on card)
  • SMUX support for ADAT and MADI
  • IR Remote Control support
  • Front panel metering and control with dedicated gain knobs
  • Bullet-proof recording with the integrated Record Panel
  • MIO Console 3d
  • MHLink Ethernet connectivity
  • USB-C connectivity


The A/D/A converters in the ULN-8 are DC-coupled to the analog I/O stages so they introduce extremely low phase distortion. The D/A has no low-frequency filtering and may be used to drive DC signals for generating CV signals for analog synths. The A/D converters have an extremely low frequency DC blocking filter that calibrates the input path and removes DC offset, so they cannot be used to capture DC CV signals, but the integrated EdgeCard slot may be used to add a wealth of ADAT connectivity to the ULN-8, which can be used to drive dedicated third-party CV converters.


Monitoring is critical to the production process at every stage; you need to be able hear exactly what you are working on. Your monitor chain will be limited by the weakest link in the chain. The ULN-8 3d integrates a transparent digitally controlled analog-domain monitor controller to ensure that you can connect directly to your reproduction chain without having to reduce the fidelity of your signal with an inferior monitor control system.
The Monitor Controller in the ULN-8 3d provides sophisticated monitor control features that are only available in dedicated monitor controllers that paradoxically cost more than the ULN-8 3d. These features include:

Multiple source selection
Multiple speaker output selection
Shared speaker set support
Per speaker gain and delay
Per speaker solo/mute control
Output path calibration support
Multichannel support from Stereo up to 7.1.4 Surround (Dolby Atmos®)
Mono fold-down
Mute and Dim
Analog domain gain control
Multiple cue output support
PFL/AFL integration with the mixer
In addition to all these high-end features, the MH Monitor Controller provides unique support for per-output-path configurable signal processing including EQ, Bass Management and protective limiting. Each output path can have its own signal processing, even if the paths share speakers. This allows you to configure alternate monitoring setups with one monitoring system (for example, you could configure the signal processing to provide a band-limited monitoring path or a path that lacks subwoofer reinforcement).

Each ULN-8 3d includes a high quality headphone amplifier with dedicated D/A conversion (which is the same quality as the primary D/A’s in the system), and digitally controlled analog domain gain control. So you don’t need to add a headphone amp to your system. By default the headphones are configured as a parallel Cue output mult’ed from the Monitor Controller, but you can drive the headphones with an independent mix or you can make them an alternate output for the monitor controller.


    USB-C Audio Interface Features:

    • 192 kHz converter
    • 8 Ultra-low noise preamps
    • MH-Link
    • DSP license
    • EdgeBus slot
    • ANOC
    • LED meter
    • Phantom power +48 V
    • Format: 19", 1U
    • Dimensions (W x H x D): 423 x 44 x 330 mm
    • Weight: 2.7 kg
    • Includes rack ears and external power supply



    • 8 x Microphone input Sub-D25
    • 2 x Hi-Z input 6.3 mm jack
    • 8 x line input Sub-D25
    • 8 x Line Output Sub-D25
    • 8 x Send Sub-D25
    • 2 x Monitor output 6.3 mm jack
    • AES / EBU input and output Sub-D25
    • MIDI input and output
    • MH-Link
    • SMPTE input and output
    • Word Clock BNC input and output
    • Stereo headphone output 6.3 mm jack
    • USB-C


    Tech Specs:

    Recording / Playback Channels


    Number of Mic Inputs


    Number of Line Imputs


    Number of Instrument Inputs


    Number of Line Outs


    Headphone Outs


    Phantom power


    Number of S/PDIF Connectors


    Number of ADAT Connectors


    Numer of AES/EBU Connectors


    Number of MADI Connectors




    Other Connectors


    MIDI interface


    Word Clock

    1xIn, 1xOut

    Max. sample rate (kHz)

    192 kHz

    Max. resolution in bit

    24 bit

    USB Bus-Powered


    Incl. power supply


    USB Version

    USB C

    Width in mm

    423 mm

    Depth in mm

    330 mm

    Height in mm

    44 m