Rocktron Hush IICX Noise Reduction System. For sale is a used Rocktron Hush IICX noise reduction system in excellent condition. This was used in a home studio only. There are some minor scratches on the bottom of the chassis and two light scratches on the top. Aside from some very light screw hole mounting wear, the front panel is perfect. This unit works like new. There are no issues with any of the knobs or push button switches or led meters. There is no manual included with this unit but you should be able to download a pdf manual for free online. This unit features two channels of noise reduction which can be operated individually or linked in stereo mode with a stereo master push button. Also featured are separate controls per channel for threshold, cut-off frequency, release (fast or slow), selectable line or instrument, and effect in or out. The stereo master button links both channels together when using stereo sources. The rear panel has 1/4" inputs and outputs. This unit uses a patented downward expander and dynamic filter. On each channel, the expander and filter each have four led meters to indicate gain reduction and cutoff frequency. This unit can be used for individual noisy instruments such as guitars and analog synthesizers or to process an entire stereo mix.