Metric Halo | ULN-8 Digital Audio Processor

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.

Buy Metric Halo: ULN-8 on EMI for 3, 6, 9 & 12 months.

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. 

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.


8 Channels of Archival Grade 192k A/D converters.
8 Channels of Archival Grade 192k D/A converters.
2 Channels of Archival Grade 192k D/A converters with integrated headphone amp.
8 Channels of Exceptional Remote Controllable Ultra-Low-Noise Clickless Preamps.
Analog Send/Return architecture for analog access to preamps (pre A/D).
2 Channels of Exceptional DI inputs suitable for instrument or turntable inputs.
Integrated Surround Monitor Controller.
8 Channels of 192k capable AES Inputs and Outputs.
Comprehensive Front Panel Controls.
Comprehensive, High Resolution 15 Segment Precision Front Panel Metering.
Comprehensive Clocking (Internal, Word Clock, AES).
Dedicated internal clock sources for all rates.
Dedicated MIDI I/O for Control Surface interfacing.
Dedicated SMPTE LTC I/O for Timecode without sacrificing any audio channels.
Extremely Compact (everything in 1 RU).
FireWire Interfacing with ultra-stable, ultra low-latency drivers (FW400 & FW800 supported).

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.

The ULN-8 provides mastering room, archival quality conversion at multichannel prices. From a quality perspective, the ULN-8 provides a complete mastering toolkit - ready to drive a mastering suite. With transparent converters (A/D/A conversion is inaudible) and transparent reciprocal processing, the ULN-8 provides a load-in, monitoring and processing interface for any mastering suite. Eight channels of conversion and AES interfacing allow for multiple analog and digital processing signal chains as well as monitoring and processing in surround. If more analog processing chains are required, additional ULN-8s may be added to a system.

The same quality standards apply to the preamps provided for the ULN-8. For recording, the ULN-8 allows you to leave the boutique preamps at home because the preamps in the ULN-8 are boutique pres. They just don’t require extra power, weight or cabling to be used. Multiple ULN-8s may be combined to build large- scale recording packages in a small space. The ULN-8 can also be combined with 2882 and ULN-2 units in a complete recording system.

The integrated mixer in the ULN-8 is not a mere cue mixer. It is a complete digital console with mono to 7.1 bus support, monitor control section, instantiable delay-compensated processing with full delay-compensated send and return support in the mixer. Not only can you mix monitor mixes for performers with essentially zero latency, you can also mix the show live for an immediate stereo reference.

At mix down time, utilize the acclaimed mixing and processing engine in the ULN-8 as your ultra-high-quality digital outboard summing system. Or, if you are an analog-summing aficionado, you can use the exceptional converters in the ULN-8 to drive your analog summing bus and capture the results. The ULN-8 A/D/A is penalty free. But as many engineers have discovered, the exceptional mix-bus quality of the 2d Mix engine coupled with MH’s exclusive Character processing may leave you wondering why you would go to the trouble to use an analog summing bus, as it is already in the ULN-8.


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