Skip to main content Skip to footer
15% off single item of $79 or more

Rocktron HUSH Ultra Rack Guitar Effects Processor MIDI Controllable 889406467583

Item #: 
  • Write a Review

The Rocktron Hush Ultra processor's innovative digital stereo noise exterminator provides two channels of the same world-renowned professional noise reduction used for years in thousands and thousands... Click To Read More About This Product

We're sorry—we no longer carry this item.

Find a similar product below or contact us for a recommendation of a great alternative.

Call: 866-498-7882 Email or Chat

Recommended Products

The Rocktron Hush Ultra processor's innovative digital stereo noise exterminator provides two channels of the same world-renowned professional noise reduction used for years in thousands and thousands of guitar rigs and recording studios. The Hush Ultra features True Bypass, an LCD display and programmable presets with MIDI control allowing you to tailor your Hush settings on individual presets to suit your needs. The Hush Ultra provides both 1/4" and XLR inputs and outputs, and is easy to setup and easy to use.

When used properly, the Rocktron Hush Ultra is completely transparent (i.e., it should not effect the audio signal-only the noise). The Hush Ultra front panel provides two controls which each manipulate both channels simultaneously. 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 as strictly a downward expander.)

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. The filter bandwidth will only open far enough to pass the highest frequency information in the input signal, thus reducing the noise above it. For example, if the highest frequency present in the input signal is 8kHz, the filter will open to pass up to 8kHz while the noise from 8kHz to 20kHz would be reduced. If a signal with frequency components up to 20kHz appears at the input, the dynamic filter will open to its full extreme (40kHz).

The second half of the Hush process incorporates downward expansion. The low level expander of the Hush system operates like an electronic volume control. The Hush system utilizes a voltage-controlled amplifier (VCA) circuit which can control the gain between the input and the output from unity to 30, 40 or even 50dB of gain reduction. As the input signal level drops below the user preset threshold point, downward expansion begins. It is at this point that the expander acts like an electronic volume control and gradually begins to decrease the output signal level relative to the input signal level.


  • Preset select/function select
  • In/out button & LED
  • Display window
  • Store/Edit button
  • Hush threshold/parameter adjust
  • Gate threshold/parameter select
  • Gate release LED
  • REF switch
  • XLR and 1/4" mono jacks
  • Phantom power jack
  • MIDI in jack
  • MIDI Thru/out jack
  • Power jack
  • Maximum Input Level: +15dB (+4 Ref.), +5dB (-10dB Ref.)
  • Input Impedance 1/4" Jacks: 470 kOhms
  • Output Impedance 1/4 Jacks:100 Ohms
  • Input Impedance XLR Jacks: 10 kOhms
  • Output Impedance XLR Jacks: 2.2 kOhms
  • Effective Noise Reduction: up to 72 dB
  • Frequency Response: ±.5dB, 10Hz - 27kHz
  • Dynamic Range: 105 dB
  • Noise Floor: -100 dBu
  • THD + Noise: -100 dBu
  • Current Consumption: 405 mA
  • Dimensions: 19 x 4 x 1-3/4"
  • Power: 9 vac 2000mA
Pro Coverage
Manufacturer's Warranty
Pedals - one year warranty.
Rack gear, digital amps, MIDI Mate footcontroller - 3 year warranty.
Rampage amps - 5 year warranty.

  • Customer Reviews

Review Snapshot

by PowerReviews
RocktronHUSH Ultra Rack Guitar Effects Processor MIDI Controllable

(based on 1 review)

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars



Reviewed by 1 customer

Displaying review 1

Back to Top

(2 of 6 customers found this review helpful)


An amazing help for noise reduction

By Cristi��́n Carrizo

from Santiago, Chile

Comments about Rocktron HUSH Ultra Rack Guitar Effects Processor MIDI Controllable:

I was recording a cuople of song with a members of my band from my ex-school and we were having a lot of troubless to get the "perfect sound" of the guitar, because the guitarist was a 20 year of experience rookie (if you know what I mean), so one of the guys suggested to use the "processor of his best friend". So after a couple of calls, the machine was there. The difference was unexplicable. No more freakin' noice in a instant! So many time waisted traing to teach a pour guitar player i sayd.... And when I note how much was it, let me write this reviw. Hope you enjoy!

Displaying review 1

Back to Top

You are changing the Ship-To country.

Our product catalog varies by country due to manufacturer restrictions. If you change the Ship-To country, some or all of the items in your cart may not ship to the new destination.