Metric Halo Mute-A-Rang Monitor Mute Kit — a hardware upgrade adding relay-based muting to the monitor output paths of ULN-8 3d and LIO-8 3d interfaces.
Mute-A-Rang is a physical relay module installed inside an existing 3d-based unit, removing the need for a full mkIV upgrade just to get clean, hardware-level monitor output muting. mkIV units already ship with this function built in, so the kit is relevant only to owners still running the older 3d platform.
Relay Muting Instead of Software Mute
Software-level muting handled by DSP or driver code can introduce clicks, DC offset transients, or lag when switching monitor sources quickly during a mix session. Mute-A-Rang solves this at the hardware level — relays break the signal path in the analog domain, delivering silent, click-free muting independent of DSP state or host software behavior. That matters when running loud monitor systems in a control room, where every switching transient is audible and fatiguing over a long session.Upgrading Without Replacing the Whole Unit
Rather than a costly interface replacement or a full mkIV conversion, this kit lets owners retrofit relay mute functionality onto an existing ULN-8 or LIO-8 3d while keeping the current digital platform and any installed expansion cards intact. This makes sense for studios already invested in the 3d ecosystem that need reliable hardware monitor muting without taking on the full mkIV feature set.KEY FEATURES
- Relay-based muting on monitor output signal paths
- Installs inside the existing 3d unit without a full electronics swap
- Eliminates clicks and pops typical of software-driven mute
- No mkIV upgrade required to gain this functionality
- Already standard on mkIV units — kit applies only to the 3d platform
TECHNICAL SPECIFICATIONS
- Model number: 000-50049
- Compatibility: ULN-8 3d, LIO-8 3d, LIO-8/4p 3d
- Upgrade type: internal relay module, unit-mounted
- Scope of operation: monitor output signal paths
- mkIV status: built-in as standard, kit not required
- Installation: service-level, requires opening the unit chassis
