Simply the best… of everything.



The ULN-8 - Available now with Early Access 3d!





ErlendMyrstad-ULN-8 I find the ULN-8 preamps extremly transparent and musical, with lots of gain and headroom.After extensive testing, I actually sold off some industry-standard external pre’s because I liked the ULN-8 pre’s better!

The converters in the ULN-8 are the most transparent I have ever used: Both in recording and high-end audio playback, the ULN-8 really shines."

The DI inputs on the ULN-8 both sound great, and I often find myself preferring them to external solutions.

Erlend Myrstad,
Producer, Engineer
Bergen, Norway

Simply the best - of everything!

Building upon the experience gained with the Mobile I/O 2882 and ULN-2, we set out to design an integrated product to literally provide the best performance in each of its component sections while still providing all of the benefits of tight integration in a single field-capable package. The ULN-8 is the result of that development program.

The ULN-8 incorporates a number of new Metric Halo Audio technologies including:

  • 192k sample rate support for both Analog and AES Inputs and Outputs
  • New DC-coupled, zero phase distortion, servo balanced Line Inputs and Outputs
  • ULN-R next generation remote controlled preamp technology. The Mic Pres in the ULN-8 build upon the audio performance pioneered by the ULN-2 preamp design with the additional benefit and technological innovation of full clickless remote control of the ULN Mic pre. This is accomplished with a sophisticated gain switching mechanism which incorporates Metric Halo "zero-cross" technology.
  • Fully clickless remote controlled Monitor outputs. All ULN-8 analog outputs incorporate Metric Halo clickless remote technology allowing for flexible monitoring applications from stereo to 7.1 surround.

Integration for the Win

By implementing all the functions of a complete audio front end in a single package, the ULN-8 is able to provide unprecedented power and quality in a lightweight, low-power consumption, single RU hardware unit. This integration provides significant benefits to the owner in the form of reduced cabling (lower cost, weight and less opportunity for failure), weight, power consumption, and cost, while at the same time providing unprecedented performance.

What does integration mean to you? Rather than pay for duplicate case work, duplicate power supplies and redundant interconnects, you get a product where all the components are engineered to work together and everything you pay for is dedicated to providing functionality towards the execution of your task. But the benefits don’t stop there. By tuning all the functional blocks of the system and removing external interconnects, the ULN-8 provides enhanced performance and reduced chance of failure from external influences. Connectors and cables are all potential sources of failure and interference. By eliminating preamp to converter and converter to interface cabling, these sources of cost and potential failure and interference are also eliminated. Internal operating levels within the box are tuned for optimal performance.

The ULN-8’s integrated design provides maximal performance with a minimum use of material and power.

ULN-8 Key Benefits at a Glance


  • Exceptional, Best–In–World, Archival Grade Converter Quality
  • Exceptional, Boutique–Quality Mic Preamps
  • Flexible, Integrated Analog-Domain Monitor Controller
  • Universal Sample Rate Support
  • Analog, AES and Firewire Interfacing
  • Rock Solid Stability: Mature, Real-World-Tested Firmware, Software and Drivers
  • Instant Access to Tactile Controls
  • Fully digital control for total recall, remote control and control surface support
  • Comprehensive Precision Metering — so you always know what is going on
  • Works with or without a Computer
  • Metric Halo’s Exclusive Per-channel selectable Character — from ultra clean to nice and gooey
  • Integrated ultra-low-latency instantiable processing with plenty of DSP power to run it
  • Most Compact, Lowest Weight, Lowest Power and Lowest Price in its Class


Suite Solution

With everything you need to record, mix, process, and master audio (just add your DAW of choice and transducers), the ULN-8 is your one-stop solution for recording, edit, mix and mastering suites. Even if you are using a DAW or recording system that does not support the ULN-8 Firewire interface, the unit’s standalone operation and standard AES and analog interface allow you to use it as the Audio Front End and Monitor Controller for Pro Tools, standalone and PC based recording systems.

The ULN-8 Starts Where Other Interfaces End

All these features make for an impressive package, but we're just beginning. The ULN-8 is built around Metric Halo's 2d DSP platform, giving you the power to run multiple mixers and plug-ins inside the box. It also includes a full +DSP license, giving you the ability to create powerful mixing, sound design and master plug-ins. Beauty and brains, in 1RU.


At Home in Any Situation

ULN-8 is the perfect tool for capturing audio wherever inspiration hits, in the studio or on the road. Well suited to any recording situation, you can record and edit on the road, in the hotel, on the airplane, or wherever inspiration hits. Use 3 ULN-8s chained together for 24 tracks of live concert recording with processing on all channels in 3 rack spaces. Location sound engineers can now capture the moment — anywhere, anytime.

When you’re done recording, use the ULN-8 in the studio as an extremely high quality audio interface to transfer your tracks into a DAW. You’ll be amazed at the sound of this box! And weighing only 6 pounds, and a little larger than a laptop, you can be the first one out of the gig, with no hassle.

The ULN-8’s archival grade inputs and outputs, coupled with Metric Halo’s exclusive Character processing, provide flexibility and sound quality unavailable on any other interface. You can transition from a wire-with-gain to a gooey tube pre with one click of the mouse, and every input can have the right character for the material you are recording.

The ULN-8 is the only unit in its class with an on-board processing engine that supports fully instantiable processing, allowing you to use Metric Halo’s world-renowned signal processing effects without sacrificing your computer’s processing power or introducing any additional latency in your monitor path. From MIOStrip to HaloVerb, the ULN-8 comes with a full +DSP license that provides all the basic production processing you need — and more. And remember, this one rack space audio interface has the ability to run entirely from any DC power source (16V-30V), making it truly and completely mobile.

Organically Scalable

A unique feature of the Mobile I/O system is that MIO’s work well individually or as a group. Mix and match ULN-8 with LIO-82882 and ULN-2 units to create a system that meets your needs for track count and preamp power. Adding a unit to the system organically increases the DSP power of the system, so that your DSP always scales with your I/O. Break your system up for small gigs when playing out or add the units of your mates to build a huge system when required. By standardizing on the Mobile I/O platform, each member of the band can have ultimate quality while working alone, and the band can have huge track counts when playing together. You can’t lose!


Stand-alone Operation

Flexible signal routing and sophisticated patch and preset management systems as well as a comprehensive set of front panel controls are also featured in the ULN-8. The ULN-8’s front-panel controls allow the unit to function equally as well as a stand-alone Mic Pre/Converter system. In standalone mode, the ULN-8 operates with the converters directly routed to and from the AES I/O, and the analog domain sends allow purely analog operation of the preamps.

As a standalone converter, the ULN-8 provides a 24bit/192kHz eight channel front-end with 8 world-class boutique-quality ULN mic pres for any recording system. It also functions seamlessly as an analog monitor controller, making it ideal as a digital headphone amp and studio monitor controller.


The ULN-8 supports a variety of applications. For studio recording, it provides a very high quality interface to a DAW, offering sound processing or simple file transfer between workstations. Its exceptional sound quality makes it perfect as any studio’s primary analog to digital conversion and monitoring chain. Songwriters and engineers can use the ULN-8 to record and edit on the road, in the hotel, while traveling, or anywhere that inspiration strikes.

The ULN-8 is suitable for broadcast applications, too. It offers instant playback of 8 individual stereo sends for music cues or sound effects, or smaller numbers of surround stems. The compact package and portable power features mean that the unit can go anywhere users need to work, and make on-site fixes or edit location recordings without the need to send files back to the studio, saving valuable time before air.

In the live performance arena, in addition to operating as a remote recorder for archiving performances or to play out backing tracks and musical cues, the ULN-8 can operate as a soft-synth mixer and I/O interface.

In Depth

  • 8 Channels of Archival Grade 192k A/D converters
    • Exceptionally flat, low-distortion A/D conversion
    • DC-coupled for ultra-low phase distortion
  • 8 Channels of Archival Grade 192k D/A converters
    • Exceptionally flat, low-distortion D/A conversion
    • DC-coupled for ultra-low phase distortion
  • 2 Channels of Archival Grade 192k D/A converters with integrated headphone amp
    • Same high-quality DC-coupled conversion
    • Dedicated, digitally controlled high-power headphone amplifier
  • 8 Channels of Exceptional Remote Controllable Ultra-Low-Noise Clickless Preamps
    • Custom designed Digitally Controlled analog preamps
    • Metric Halo Zero-Cross switching technology for clickless operation
    • Discreet gain and trim stages for ultra-high headroom operation (supports +20 dBu input)
  • Analog Send/Return architecture for analog access to preamps (pre A/D)
    • Analog domain sends from preamps (mult'ed pre-A/D)
    • Analog only preamp operation capable (with fine trim)
    • Integrated switcher to allow insert of external analog processing pre-A/D
  • 2 Channels of Exceptional DI inputs suitable for instrument or turntable inputs
    • Ultra-High-Z for no instrument loading
    • Balanced or unbalanced operation
    • Jumper configurable pre-trim gain
  • Integrated Surround Monitor Controller
    • Provides switching between any set of user specified sources (FW, AES, Analog, Mix)
    • Analog domain gain control for monitor output from Front Panel or computer
    • Supports input and monitor paths from Mono to 7.1
  • 8 Channels of 192k capable AES Inputs and Outputs
    • Available as computer I/O or direct routed I/O for converters
    • Support full channel count at all sample rates
    • Professional interfacing
  • Comprehensive Front Panel Controls
    • Full support for standalone converter and preamp operation
      • Sample Rate selection
      • Clock source selection
      • Input source selection
      • Phantom power control
    • Tactile Control of Input and Output gains
      • Gain level indication with MH Digital Dual Vernier Technology
      • Numeric gain level indication while changing gains
    • Tactile Control Cans level
    • Tactile Control Monitor Controller gain (mono - 7.1)
    • Preset recall
    • Multichannel gain linking control
    • Monitor Controller control surface
    • User-controllable brightness
    • User-controllable knob sensitivity
  • Comprehensive, High Resolution 15 Segment Precision Front Panel Metering
    • Real, functional metering for analog inputs and outputs
    • Unique ‘Meter on knob’ functionality
    • Multi-color signal level/presence metering for AES inputs and outputs
  • Comprehensive Clocking (Internal, Word Clock, AES)
  • Dedicated internal clock sources for all rates
  • Dedicated MIDI I/O for Control Surface interfacing
    • MIDI Input and Output on standard DIN connectors
    • MIDI transported to computer via FireWire for use in connecting Mackie Control protocol Control Surfaces
  • Dedicated SMPTE LTC I/O for Timecode without sacrificing any audio channels
    • Properly conditioned and band-limited SMPTE I/O on TRS balanced connections
    • Available to any CoreAudio application as audio streams
    • Directly routable to Record Panel SMPTE decoder
  • Rock-solid, time-tested fifth-generation software and drivers
    • Integrated Mixing and Deep Instantiable DSP Processing (Includes Full +DSP License)
      • Fully configurable multibus mixer with surround support (up to 7.1)
      • Full Send/Return architecture
      • Ultra-low latency, on-the-metal monitoring
      • Insert model for inserting zero-latency plugins
      • Insertable +DSP plugin graphs for configurable processing
      • Insertable graph macros for complex, pre-configured processing
      • Includes over 100 high-quality processing plugins, including:
        • MIOStrip — channel strip processing
        • Dynamics (Compressor and Limiter)
        • Transient Controller
        • EQ (6 band and 12 band)
        • Signal Processing primitives
        • Crossovers
        • and much more…
      • Per-channel and Per-bus Insertable Character™
    • FireWire Interfacing with ultra-stable, ultra low-latency drivers (FW400 & FW800 supported)
      • Supports Mac OS X v. 10.4 and newer (PPC and Intel)
      • Supports 32-bit and 64-bit kernels
    • Bidirectional Control Surface Support
      • Integrated Front Panel Tactile Controls
      • Eucon Control Surfaces
      • Mackie Control Protocol Control Surfaces
    • Integrated Multichannel Recorder (Record Panel)
      • Multichannel, multi-box tape-style high-performance recorder
      • Exceptional Stability and Sound Quality
      • Realtime waveform display
      • Extensive File Format support (BWF, WAVE, CAF, AIFF, SD2)
      • BWF timestamping from TOD or LTC (any input channel or dedicated SMPTE input)
      • Support for basic BWF metadata
      • Support for limiting record file size and seamless file breaking
      • Seamless manual file breaking (with timestamping)
      • Support for mirrored recording (recording to two drives at once)
      • Multichannel take playback
  • DC-Powerable
  • High quality, custom designed formed powder-coated aluminum case
    • Strong
    • Light weight
    • Scratch and fingerprint resistant
    • Smooth contours for snag-free transportation in a gig-bag
    • Rack-mountable with included rack-ear kit
  • Exceptional Power Performance (only 32 Watts)
  • Low mass (6 lbs / 2.7 kg)
  • Extremely Compact (everything in 1 RU)
  • Future Proof, Expandable, and software-enhanceable


Preamp Rails ±15.8 Volts
Analog Rails (low power) ±9.9 Volts
Analog Rails (high power) ±12.6 Volts
Phantom Power 48 ± 0.1 Volts
Max Phantom Current Per Mic 10 ma
Maximum I/O Levels (Balanced)
Peak Line Output @ 0 dBFS (no jumper/low power) +18.5 dBu
Peak Line Output @ 0 dBFS (output jumper/low power) +22.0 dBu
Peak Line Output @ 0 dBFS (output jumper/high power) +24.5 dBu
Analog Send Max Output +21.5 dBu
Mic Pre Max Input +20 dBu
Line In Max Input +24.5 dBu
Output Impedance 5 Ω
Monitor Controller
Nominal FS output (Balanced) Output Jumper Off -19.0 dBu
Nominal FS output (Balanced) Output Jumper On -12.0 dBu
Maximum Output Same as Line
Gain Range -96 dB to +30 dB
Gain Precision ±0.05 dB
Gain Step 0.5 dB
Mic Pre Input + ADC
Input Impedance 3.3 kΩ
Dynamic Range (-60 dB, flat 0-22.05 kHz, typ) 115 dB
Dynamic Range (-60 dB, A-weighted, typ) 118 dB
Noise Floor (flat 0-22.05 kHz, typ) 115 dB
Noise Floor (A-weighted, typ) 117.9 dB
Gain Range -22 dB to +91.5 dB
Gain Precision ±0.05 dB
Gain Step 0.5 dB
THD D/A/A/D loop @ -12 dBFS 0.0007 %
THD D/A/A/D loop @ -12 dBFS +12 dB Gain 0.0015 %
THD D/A/A/D loop @ -0 dBFS 0.0023 %
Crosstalk @ 1kHz -110dB
IMD 1k component (19 kHz/20kHz @ +8dBu) -104 dBu
EIN @ 60 dB Gain (150Ω Source Impedance) -130.50 dBu
EIN @ 60 dB Gain (0Ω Source Impedance) -133.25 dBu
Analog Send Calibration (ADC = 0 dBFS) +21.5 dBu
Phantom Power (Switchable Per Channel) +48 Volts
Mic Pre + ADC Frequency Response
+0/-0.1dB @ fs = 44100 Hz 8.9 Hz - 20.5 kHz
+0/-1.0dB @ fs = 44100 Hz 2.9 Hz - 21.0 kHz
+0/-0.1dB @ fs = 96000 Hz 8.9 Hz - 43.9 kHz
+0/-1.0dB @ fs = 96000 Hz 2.9 Hz - 45.4 kHz
+0/-0.1dB @ fs = 192000 Hz 8.9 Hz - 42.1 kHz
+0/-1.0dB @ fs = 192000 Hz 2.9 Hz - 64.7 kHz
5° low-end in-channel phase deviation point 20.0 Hz
Interchannel phase 0 Hz - 20 kHz < ±0.05°
Crosstalk from SMPTE Input < -142 dB
Line Input + ADC
Input Impedance 10 kΩ
Dynamic Range (-60 dB, flat 0-22.05 kHz, typ) 115 dB
Dynamic Range (-60 dB, A-weighted, typ) 118 dB
Noise Floor (flat 0-22.05 kHz, typ) 115 dB
Noise Floor (A-weighted, typ) 117.9 dB
THD D/A/A/D loop @ -12 dBFS 0.0005 %
THD D/A/A/D loop @ -0 dBFS 0.0015 %
Crosstalk @ 1kHz -127 dB
IMD 1k component (19 kHz/20kHz @ +8dBu) -104 dBu
Gain Range -12 dB to +31.5 dB
Gain Precision ±0.05 dB
Gain Step 0.5 dB
Line Input + ADC Frequency Response
+0/-0.1dB @ fs = 44100 Hz 5.7 Hz - 20.5 kHz
+0/-1.0dB @ fs = 44100 Hz 1.8 Hz - 21.0 kHz
+0/-0.1dB @ fs = 96000 Hz 5.7 Hz - 43.9 kHz
+0/-1.0dB @ fs = 96000 Hz 1.8 Hz - 45.4 kHz
+0/-0.1dB @ fs = 192000 Hz 5.7 Hz - 42.1 kHz
+0/-1.0dB @ fs = 192000 Hz 1.8 Hz - 64.7 kHz
5° low-end in-channel phase deviation point 10.7 Hz
Interchannel phase 0 Hz - 20 kHz < ±0.05°
Crosstalk from SMPTE Input < -142 dB
Input Processing
M/S Decode Instantiable
Parametric EQ Instantiable
Dynamics Instantiable
Limiting Instantiable
Character Instantiable
Transient Control Instantiable
Reverb Instantiable
Delay Instantiable
Nearly Infinite Combinations via +DSP Instantiable
Output Processing
M/S Encode Instantiable
Parametric EQ Instantiable
Dynamics Instantiable
Limiting Instantiable
Character Instantiable
Transient Control Instantiable
Reverb Instantiable
Dither Instantiable
Mix Foldown Instantiable
Signal Generation Instantiable
Nearly Infinite Combinations via +DSP Instantiable
Front Panel
Indicator LEDs (Bicolor) 495
Meters 16
Segments per Meter 15
Channel Encoder Knobs 8
Encoders Have Shaft Push Buttons Yes
Monitor Controller Encoder Knobs 1
Monitor Controller Mute Yes
Monitor Controller Dim Yes
Indicators Per Encoder 16
Sample Rate Indicators 6
Clock Source Indicators 4
AES Clock Source Indicators 4
AES Lock Indicators 4
AES Input Signal Indicators 4
AES Output Signal Indicators 4
System Lock Indicator 1
Firewire Indicator 1
Front Panel Modes 14
Headphone Output (Dedicated DAC) TRS Stereo
DI Inputs (2) TRS Balanced
DI Input Impedance 10 MΩ
DI Input Fixed Gain (Jumper Selectable) 0/10/20 dB
DI Input Variable Gain -12 dB to 31.5 dB
Power Switch (Jumper Defeatable) Toggle
Back Panel
MIDI Connectors (In and Out) 5-Pin DIN
SMPTE Connectors (In and Out) Balanced TRS
Word Clock Connectors (In and Out) 75Ω BNC
AES Connector (8 Channels In and Out) DB-25
AES Connector Pinout Tascam/Digidesign Digital
Mic Input Connector (8 Channels) DB-25
Mic Input Pinout Tascam/Digidesign Analog
Line Input Connector (8 Channels) DB-25
Line Input Pinout Tascam/Digidesign Analog
Send Output Connector (8 Channels) DB-25
Send Output Pinout Tascam/Digidesign Analog
Line/Monitor Output Connector (8 Channels) DB-25
Line/Monitor Output Pinout Tascam/Digidesign Analog
Line/Monitor Mult Output Connectors (Analog 1/2) TRS Balanced
FireWire Connectors (2) 1394a 6-Pin
Power (Unswitched) 2.1mm Coaxial
Power (Switched) 4-Pin XLR
Security Slot Kensington
Driver CoreAudio Mac OS X
Mac OS X 10.3.9 or newer
Architectures PPC, Intel
MIO Console Included
Record Panel Included
LTC Decoder Included
Mixer Included
+DSP License Included
Voltage 14v - 28v
Power 32 Watts
FireWire Bus Powerable No
Passes FireWire Bus Power Yes
Supplies FireWire Bus Power No
External Supply (Input) I00-240VAC
External Supply (Max Input Current) 1.2 A
External Supply (Output) 24 VDC
External Supply (Max Output Current) 2.0 A
External Supply Connector 4-Pin XLR
Material Powder Coated Aluminum
Fasteners 3mm Phillips Head
Weight 6 lbs
Weight 2.7 kg
Dimensions 17" x 13" x 1.72"
Dimensions 432 x 330 x 44 mm
Rack Ears (included) Powder Coated Steel
Rear Rack Mounts Available

Hardware Comparison

Which interface is right for me?

While all Metric Halo interfaces are multi-purpose, each has characteristics that make it shine in one use or another:

  • ULN-8: Our top of the line, archival quality unit. The ULN-8 has the quality and features to handle the most demanding jobs. Perfect for everything from classical recording to the mastering suite, or any user that needs ultimate power and flexibility.
  • LIO-8: All the audio quality of the ULN-8, minus the mic pres and +DSP license. Perfect for the editing suite, recording with your own pres or interfacing your analog console. In true MH style, the mics pres and +DSP license can be added if your needs change.
  • ULN-2: Two channels of boutique quality mic pres in a small package. The ULN-2 is at home in the mastering studio as well as your home studio. Perfect for the discerning recordist who doesn't require high channels counts but demands high quality and appreciates portability.
  • 2882: Eight channels of analog I/O that fits in your backpack. The 2882 is clean without being pristine and packs a lot of power.

Use the following table to see the notable differences between the interfaces.


Feature ULN-8 LIO-8 ULN-2 2882
Converter Technology 2nd Generation 2nd Generation 1st Generation 1st Generation
Preamp Technology 3rd Generation Optional (1) 2nd Generation 1st Generation
Analog Technology 3rd Generation 3rd Generation 2nd Generation 1st Generation
DSP Technology 2nd Generation 2nd Generation 2nd Generation 2nd Generation
44.1k - 48k
88.2k - 96k
176.4k - 192k n/a n/a
Channels of A/D 8 8 2 8
Mic pres 8 0, 4, 8 (1) 2 8
Gain 91.5 dB 91.5 dB (1) 72 dB 42 dB
Jensen Option n/a n/a n/a
Noise floor 117.9 dB 117.9 dB 110 dB 110 dB
Insert points 8 0 (8 sends) 2 n/a
Dedicated DIs 2 2 n/a n/a
Metering 15 Segment Multicolor 15 Segment Multicolor 10 Segment
Fixed Color
10 Segment
Fixed Color
Channels of D/A 8
(plus headphones)
(plus headphones)
4 8
(plus headphones)
Output Control Digitally Controlled Analog Digitally Controlled Analog Analog (Monitor Outs), Digital (Analog Outs) Digital/Analog hybrid
Output Control UI FP + Computer FP + Computer FP Only (Analog)
Computer Only (Digital)
Computer Only
Monitor Controller Analog Domain Analog Domain Digital Domain Digital Domain
AES Digital I/O 8 channels
(single wire)
8 channels
(single wire)
2 channels(2) 2 channels(2)
Optical Digital I/O n/a n/a 8 channels ADAT(3)
or 2 Channels TOSLINK
8 channels ADAT(3)
or 2 Channels TOSLINK
Wordclock I/O
Multipurpose encoders 9 9 n/a n/a
Tact Switches 7 7 2 (snapshot selection) 2 (Mute & Dim)
Gain Control UI FP + Computer FP + Computer FP Only Computer Only
Gain Control Encoder Encoder Switch/Pot Computer
Gain Style Digitally Controlled Analog Digitally Controlled Analog Analog Digitally Controlled Analog
2d Card
Ultra-low Latency Mixer
Basic DSP Plugin Bundle
+DSP license Optional(4) Optional(4) Optional(4)
Number of channels to/from DAW over FireWire 18 (5) 18 (5) 18 18
Number of boxes per FireWire bus

3@ 44.1 - 48 kHz

2@ 88.2 - 196 kHz

3@ 44.1 - 48 kHz

2@ 88.2 - 196 kHz

3@ 44.1 - 48 kHz

2@ 88.2 - 196 kHz

3@ 44.1 - 48 kHz

2@ 88.2 - 196 kHz

Bus powerable? No No (6) (6)
DC powerable?
Power Switch No No
Audio I/O connectors DB-25 DB-25 XLR and TRS XLR and TRS
SMPTE I/O n/a n/a
MIDI I/O (7) (7) n/a n/a
Dimensions 17" x 13" x 1.72"
432 x 330 x 44 mm
17" x 13" x 1.72"
432 x 330 x 44 mm
13.5” x 8.25” x 1.73”
343 x 210 x 44 mm
13.5" × 11" × 1.73"
343 x 279 x 44 mm
Weight 6 lbs
2.7 kg
6 lbs
2.7 kg
4 lbs
1.8 kg
4.5 lbs
2 kg
Suggested retail price $4495 $2995 $1595 $1795


1: 4 or 8 channels of 3rd Generation ULN-R mic pres may be installed as a factory option or at a later time.
2: Switchable between AES and SPDIF. ASRC available on input.
3: ADAT does not support SMUX; operation is limited to 44.1-48 kHz
4: +DSP licence can be added for $699 at any time.
5: Firewire transport limited to 8 channels in each direction @ 176.2-192 kHz sample rate.
6: Interfaces may require a "jumpstart" to boot on some laptops. More information is available here.
7: MIDI I/O is for control surface connection, and not optimized for musical input

2d & MIO Console


The brains behind the sound...


2dLogo_badge MIOConsoleGray

All Metric Halo interfaces are built on the 2d DSP card and MIO Console software.

Click here to find out more about these core technologies.



System Requirements

  • Computer:
    • Any Mac that supports Mac OS X
    • At least one FireWire port; one port will support 3 interfaces at 44.1 - 48 kHz, and 2 interfaces at 88.2 - 192 kHz
    • Universal Binary (native support for PPC and Intel)
    • Mac OS X 10.6.8 or newer required
  • Peripheral FireWire Adaptors supported:
    • OHCI compliant PC Card, PCI card, ExpressCard or PCIe card
    • Apple Thunderbolt to FireWire adapter, Apple Thunderbolt display, Sonnet Technology Thunderbolt to Expresscard adapter with FireWire Pro 800 ExpressCard/34
  • Software: All CoreAudio compliant software is compatible with Mobile I/O, including:
    • Cubase
    • Digital Performer
    • GarageBand
    • iTunes
    • Live
    • Logic
    • Nuendo
    • PreMaster CD
    • soundBlade
    • WaveBurner
    • Pro Tools
    • and hundreds more…

What's Included

  • One ULN-8 unit
  • One IEC Power Cord appropriate for your area
  • One 24-volt 48-watt world-ready external power supply
  • One 30” IEEE 1394 9-pin to 6-pin FireWire Cable
  • One 4.5 meter IEEE 1394 9-pin to 6-pin FireWire Cable
  • Two Rack Ears w/ fasteners
  • Rubber feet
  • Configuration jumpers
  • MIO Software CD-ROM
  • Warranty/Registration Card