INTRODUCTION The Decimator ProRackG guitar noise reduction system defines a new standard for excellence in real time noise reduction performance. The Decimator ProRackG was designed to provide the maximum possible performance in a rack mount dual channel noise reduction system designed specifically for extremely high gain guitar amplifiers.
FRONT PANEL 1. POWER SWITCH Switches the unit on and off. 2. POWER LED Indicates when the power is on. 3. FILTER TRACKING CONTROL This control adjusts the sensitivity of the filter threshold in relation to the downward expander threshold. Turning this control clockwise increases the level at which the dynamic filter opens. Turning this control counterclockwise decreases the level at which the dynamic filter opens. 4.
REAR PANEL 1. CHANNEL 1 INPUT JACK This ¼ inch mono jack provides the high impedance input for connection to your guitar. 2. CHANNEL 1 OUTPUT JACK This ¼ inch mono jack provides the unbalanced output signal for channel 1. 3. CHANNEL 2 INPUT JACK This ¼ inch mono jack provides a balanced input for the audio path channel 2. 4. CHANNEL 2 OUTPUT JACK This ¼ inch mono jack provides the unbalanced output signal for channel 2. 5.
PRO RACK G STEREO MOD VERSION: 1. LINE INPUT JACK THIS ¼ MONO JACK PROVIDES THE HIGH IMPEDANCE INPUT FOR CONNECTION TO YOUR GUITAR 2. LINE OUTPUT JACK THIS ¼ MONO JACK PROVIDES OUTPUT TO A SELECTED AMPLIFIED SPEAKER SYSTEM THIS VERSION OF THE PRO RACK G IS A CUSTOM VERSION FOR RACK DESIGNERS. THIS SYSTEM PROVIDES CONNECTIONS THAT REQUIRE THE GUITAR TO BE PLUGGED INTO THE LINE INPUT JACK (1) AND THE INPUT OF THE AMPLIFIER TO BE PLUGGED INTO THE LINE OUTPUT JACK (2).
When properly used, the Decimator ProRack G should be completely transparent, it should have no effect on the audio signal other than to remove the background noise. To maximize the performance of the Decimator, it is necessary to understand both the operation of the controls and the principles of how the internal circuit operates. After this understanding, it will be easier to set up the Decimator ProRack G to suit any application.
to 1 ratio controls the release response of the Downward Expander. The release response will be extremely fast, on the order of 2 milliseconds, if the input signal has a fast decaying envelope and upwards of 2 seconds if the input signal has a slow decaying signal. Downward Expansion takes place when the input signal level drops below the preset threshold. For example: if the threshold is set for 0db and input signal of 0db with produce no expansion.
SETTING THE FILTER TRACKING CONTROL The FILTER TRACKING control adjusts the relationship between the sensitivity of the Dynamic Filter and the Expander. Once the THRESHOLD control is set for proper operation of the downward expander increase the FILTER TRACKING control until the desired dynamic filter operation is achieved. Setting this control to high will cause the filter to not fully open when high frequency signals are present.
WARRANTY AND SERVICE The unit, parts and workmanship are fully guaranteed to be free of defects under normal use and service for a period of 2 years from the date of purchase. Any damage resulting from the misuse or the failure to follow the precautions and instructions will void the warranty. In the event that the unit needs to be repaired, please return the unit to ISP Technologies directly.