Radial Engineering mPress Broadcast Press Box


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  • The Radial mPress is a modular press box that can be expanded as needed to feed a community-sized press gallery or distribute audio for an international event. The design begins with the mPress, a master head distribution amplifier that is equipped with two microphone inputs, 48V phantom power for condenser microphones and a built-in limiter to prevent overload from overly rambunctious orators. Eight balanced mic outputs may be used to supply feeds to a small press gathering. For larger system requirements, a series of modular Exo-Pods may be deployed. These external modules are connected using standard mic cables and feature ten balanced mic outputs and four mini 3.5mm TRS connections to feed portable recorders or hand-held video cameras. In order to eliminate hum and buzz caused by ground loops, stray DC currents and less than ideal powering systems, all outputs are transformer isolated.

    The mPress’s modular approach replaces the spaghetti of cables that usually hampers setups with an orderly system than enables one to create zones for various groups. From each of the mPress XLR outputs as many as four Exo-Pods may be chained together, for a total of 320 microphone and 128 recorder outputs. A built-in 1kHz test tone provides everyone with a reference level and the built-in headphone amplifier helps when trouble shooting. To simplify setups, a main stereo output is available to feed a pair of powered speakers and broadcast the event to an audience. Separate audio inputs also enable the mPress to play background music while waiting for the guest speaker to appear.

    The mPress… a modular press box designed to grow to suit your needs.


    • Modular press box with up to 448 outputs
    • Completely analog, no digital trickery!
    • Active drive with transformer isolation to eliminate noise
    • Can play background music when on standby
  • Audio circuit type: Low Noise Active Buffer
    Frequency response: 20Hz to >20KHz +0/-1.5dB
    Total harmonic distortion: <0.001% @ +4dB
    Dynamic range: >112dB
    Input impedance: 7k Ω
    Maximum gain: +51dB
    Noise floor: -94dBu
    Low-cut filter: 100Hz (12dB/Octave)
    Limiter threshold: -10dBu to +5dBu Output
    Limiter ratio: >20:1
    Input impedance: 22K Ω
    Maximum gain: +19dB
    Equivalent input noise: -111dBu
    Clip level: +24dBu/+17dBu
    Output impedance: 880 Ω
    Intermodulation distortion: 0.002%;
    Exo-Pod output  
    Output impedance: 115 Ohms;
    Noise floor: (Program in to main out) -80/-92dBu
    Phase deviation: ±15°
    Microphone signal present LED threshold: -70dBu/-54dBu/-42dBu
    Phase deviation: ±15°
    Power: ±15V/+5V Custom Power Supply
    Construction: 14 gauge steel chassis & outer shell
    Finish: Durable powder coat
    Size: L:19" x W:7.25" H:1.75 (482.6mm x 184.15mm x 44.5mm)
    Weight: 6.25lb
    Shipping size: L:22.5" x W:10.25" H:4.5" (571.5mm x 260.35mm x 114.3mm)
    Shipping weight: 7.2lb
    Warranty: Radial 3-year, transferable
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