Whirlwind HotBox Active Reference Direct Box

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For recording, touring, broadcast, pro-audio or plain old performing, you simply can't do better than Whirlwind's HotBox Active Reference DI. Advanced active electronic circuitry completely eliminates low-end saturation and provides an incredibly wide band-width with virtually no signal loss. Plus there's tons of headroom! The HotBox can be powered by two 9V batteries (minimum fife of 500 hours), or you have the option of utilizing the 48V phantom power built into most mixing consoles. And a ground lift provides true, switchable ground isolation, even when using phantom power. For true transformer-less, totally transparent box operation, the HotBox has it all.


  • 1/4" parallel wired in/out jacks
  • Ground Lift switch to help eliminate hum and buzz
  • Input switch selects between instrument/line or speaker level input signals
  • LED indicates "ON" status
  • Specifications
  • Maximum Input Level
    • Battery: +15 dBm
    • Battery w/ pad: +35 dBm
    • 48V Phantom: +20 dBm
    • 48V Phantom w/ pad: +40 dBm
  • Input Impedance: 1 Mohm
    • w/ pad: 11 kohms
  • Gain Structure: -20 dBm
    • w/ pad: -40 dBm
  • Residual Noise: -115 dBm
  • Frequency Response: +/- 3 dB, 20 Hz to 20 kHz
  • T.H.D. + Noise: .002%
  • Output Impedance: 150 ohms
  • Power Requirements: 48V phantom power or two 9V alkaline type batteries
  • Battery Life: Approx. 300 hours
  • Current Draw: <4.0mA DC