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Hush Pro Guitar Noise Reduction System

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Stereo noise extermination for studio and stage applications.

The Rocktron HUSH PRO continues the tradition of over 2 decades of Rocktron's world-famous HUSH products used by music professionals. Nothing beats a HUSH when it comes to reducing and eliminating noise problems.

The HUSH PRO provides both 1/4" and XLR inputs and outputs, and is easy to setup and use. Eliminate hiss, crackle, and other noise problems with the very best, award-winning, noise-reduction circuitry possible.

With a dynamic range of 105dB and 72dB of effective noise reduction, the HUSH PRO is a valuable tool in the studio, on stage, or in a guitar rig. The HUSH PRO exterminates noise from a wide array of sources. Use the HUSH PRO as a hard gate with noise reduction to curb feedback when connected to a mixer.

When used correctly, the Rocktron HUSH PRO is completely transparent-it won't affect the audio signal, only the unwanted noise. As single-ended noise reduction, nothing comes close to the effectiveness of the HUSH. Rocktron's patented HUSH noise reduction is a single-ended system that combines the principles of dynamic filtering and low-level downward expansion.

Dynamic filtering is achieved by dynamically-controlling a low pass filter to open and close the bandwidth of the output signal depending on the amount of mid- and high-band information present in the input signal. The filter bandwidth will only open far enough to pass the highest frequency information in the signal, thus reducing the noise above it.

The second half of the Rocktron HUSH process incorporates downward expansion. The low-level expander of the HUSH system operates like an electronic volume control.

The HUSH Threshold control sets the amount of noise reduction required for a given input signal, while the Gate Threshold control provides additional downward expansion when increased. The Gate Threshold control may also be used by itself, allowing the unit to be used strictly as a downward expander.

The Rocktron HUSH PRO is equipped with an effect IN/OUT (or bypass), and an input sensitivity switch conveniently located on the unit's front panel.

The HUSH PRO is also a great addition to a guitar rig, leaving your tone intact while wiping out noise from preamps, stompboxes, effects units, and more. And unlike tone-squashing noise gates, Rocktron's V.I.R. (Variable Integrated Release) circuitry allows every note you play to shine through and sustain naturally. The V.I.R. tracks every detail and nuance to provide the necessary noise reduction with ease and simplicity.


  • 1/4" and XLR inputs/outputs
  • Up to 72dB of noise reduction

Squash noise, not your tone! Order now.


Hush Pro Guitar Noise Reduction System Specifications:

  • Maximum input level +15dB (+4 Ref.) / +5dB (-10dB Ref.)
  • Input impedance, 1/4" jacks: 470K ohms
  • Output impedance, 1/4" jacks: 100 ohms
  • Input impedance, XLR jacks: 10K ohms
  • Output impedance XLR jacks: 2.2K ohms
  • Effective noise reduction: up to 72dB
  • Frequency Response: ±.5dB, 10Hz - 27kHz
  • Dynamic range: 105dB
  • Noise floor: -100dBu
  • THD + noise: .041% @ 0dBu, 1kHz (typ)
  • Current consumption: 405mA
  • Dimensions: 19" x 4" x 1-3/4"
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