The RDL RU-NMP44 4 x 4 Networking Mixer Processor serves as a network mixing processor with six virtual audio mixers that are controlled via network commands from RDL and other network remote controls. Each mixer functions independently, allowing for signal attenuation from unity to off. Additionally, the output level from each mixer can be adjusted individually from unity to off. Depending on the commands received by the RU-NMP44, each mixer can be utilized as a mixer, a source selector, a priority paging inserter, and/or as a volume control.

Four of the mixers' outputs drive corresponding network audio channels, while the outputs from the remaining two mixers power line-level +4 dBu audio outputs.
Configuration of the RU-NMP44 is managed through RDL CONSOLE or other network control software.
When implementing ducking, one of the four network audio inputs is assigned as the priority input, connected to all six virtual mixers. An audio detector, with a threshold and recovery delay defined by the installer, can be allocated to one, several, or all of the six mixers. For each of these mixers, the priority input is set to a specific level, and the other three inputs are adjusted to attenuate to a fixed level between -10 and -64 dB upon detecting a message on the priority input. If hum is expected from the paging source, one of four high-pass filters may be activated.

The RU-NMP44 can store up to four preset configurations, each defining any or all mixer level settings.
Activation of a preset can be triggered by network commands, RDL network or wired remote controls, a momentary switch closure, or a compatible open-collector from other equipment.
The RU-NMP44 can be powered by an external 24 Vdc power supply or a PoE enabled network switch. In case both power sources are available, the unit will operate from the external supply and seamlessly switch to PoE power if the external supply fails.

Suitable for enhancing volume control, mixing, switching, and ducking in existing network audio systems, the RU-NMP44's digital signal processing capabilities meet various audio system design needs in environments like classrooms, meeting rooms, restaurants/bars, fitness gyms, and retail stores.
Engineered in the U.S.A., the RU-NMP44 is housed in a robust, all-metal enclosure suitable for free-standing, surface-mounted, or rack-mounted use, designed to withstand continuous operation in demanding installations. Built for durability and superior performance, the RU-NMP44 is a valuable asset in commercial networked audio systems.

Key Features

• Six virtual audio mixers are networked together using Dante / AES67 technology.
  
• Each mixer is fed by four Dante network inputs.
  
• The four outputs of each mixer are connected to Dante network channels.
  
• Two of the mixer outputs are connected to balanced line-level outputs.
  
• It is possible to configure a pair of mixers for stereo audio.
  
• The module can be configured and adjusted using network control software.
  
• It is compatible with RDL networked remote controls.
  
• Each input of each mixer can be adjusted in 1 dB steps for level adjustment.
  
• Each output of each mixer can be adjusted in 1 dB steps for level adjustment.
  
• Each virtual mixer has assignable automatic (VOX) priority ducking.
  
• Priority can be assigned to one of the four received network channels.
  
• The priority input has selectable high pass filters.
  
• The ducking threshold, attenuation level, and recovery delay are adjustable.
  
• Four preset configurations for routing, mixing, and levels can be stored.
  
• Presets can be activated by network commands, at power-up, or using the RDL RC4M remote control.
  
• LED indicators are provided for power and network sync.
  
• The module can be powered by PoE (Class 0, IEEE 802.3af) or external 24 Vdc.

Technical Specifications

Network Connector
RJ45 with Link and Speed indicators
Digital Audio Ethernet Protocol
Dante or AES67
Digital Audio Sources (4)
Dante or AES67
Transmission Rate
100 Mbps
Sample Rates Supported
44.1 kHz, 48 kHz (default)
Bit Depth Supported
24 bits
Digital Audio Outputs (4)
One output channel per virtual mixer (1 through 4)
Outputs (2)
+4 dBu (nominal, -20 dBFS), 150 Ohms
Output Connection
Detachable terminal block
Frequency Response
20 Hz to 20 kHz (± 0.25 dB)
THD+N
< 0.01%
Noise below +4 dBu
< 85 dB
Crosstalk
Below noise floor (20 Hz to 20 kHz, -20 dBFS)
Headroom above +4 dBu
> 18 dB
Note: All 6 virtual mixers use the same four network audio sources.
Note: Each mixer output is connected to one RU-NMP44 output.
Note: A mixer that is using only one input acts as a virtual VCA.
Note: A mixer that is using one standard and one priority input acts as a paging / ducking module.
Inputs (Up to 4)
Dante or AES67
Input Attenuation (Mix level)
0 to -64, 1 dB steps (-64 = OFF)
Mixed Output Attenuation
0 to -64, 1 dB steps (-64 = OFF)
Mixer Output (Mixer 1 thru 4)
Dante or AES67
Mixer Output (Mixer 5 and 6)
+4 dBu, Balanced Analog
Priority Input
Dante or AES67 Input 1, 2, 3 or 4
Priority Input Filters
Programmable: 36 dB/Octave; High-Pass 100 Hz, 125 Hz, 200 Hz and 250 Hz
Priority Detector Threshold
-25 dB (default); adjustable -15 to -40 dB (rel -20 dBFS)
Ducking Attenuation
10 to 64 dB, 1 dB steps (64 = OFF)
Recovery Delay
2 seconds (default); adjustable 0.5 to 10 seconds, 0.5 second steps
Recovery Ramp
Adjustable 1 second to 10 seconds
Number of Presets
4
Stored Settings per Preset
All settings for all mixers, routing of network inputs and outputs
Preset Activation
Programmable at power-up (1 preset), momentary contact or open collector (supporting 24V pullup), RDL D*-RC4M Remote Controls (up to 3)
Preset Connections
Detachable terminal block
Indicators (2)
Power, Sync
Ambient Operating Environment
0° C to 40° C
Power Requirement
24 Vdc @ 150 mA
Dimensions
Height: 1.64 in. (4.17 cm); Width: 5.74 in. (14.58 cm); Depth: 3.96 in. (10.06 cm)
Package Type
Cardboard Box
Package Dimensions
6.7 x 6.25 x 2.75 in
Shipping Weight
1.358 lbs.
WEEE weight
1.1 lbs.
Tariff code
8543.70.9100