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Item # 584206 | Customer Ratings: Ratings ( 4 Based on 1 reviews)

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Rocktron HUSH Ultra Rack Guitar Effects Processor MIDI Controllable
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      Rocktron HUSH Ultra Rack Guitar Effects Processor MIDI Controllable (584206)
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Hush your hiss.

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.

Rocktron HUSH Ultra Rack Guitar Effects Processor MIDI Controllable Features:

  • 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


Rocktron HUSH Ultra Rack Guitar Effects Processor MIDI Controllable Specifications:

  • 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


Rocktron HUSH Ultra Rack Guitar Effects Processor MIDI Controllable

Pedals - one year warranty.
Rack gear, digital amps, MIDI Mate footcontroller - 3 year warranty.
Rampage amps - 5 year warranty.

Get your gear covered!

Now you can get added warranty protection for your new gear. Pro Coverage steps in where the manufacturer's "normal wear and tear" ends. Our PRO COVERAGE program offers you UPGRADED COVERAGE if your product ever fails!

Pro Coverage includes:

  • Accidental damage protection (new gear only)
  • Expedited Repair
  • Free Shipping (for returns or repairs)
  • 100% Coverage for Commercial Use
  • Extended Return Period
  • Extended Price Protection
  • No Lemon Guarantee
  • Free Transfer of Coverage to a new owner
  • Repair Costs Covered for up to 3 years from date of purchase
  • Repairs Can Be Authorized Toll-Free by Phone or the via the web
Product Reviews
(Based on 1 reviews)
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  • An amazing help for noise reduction

    As reviewed by Cristián Carrizo on 4/4/2011

    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!

    2 of 6 people found this review helpful.
    Was this review helpful?
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