JBL JBL-PRX915-NA User Manual

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Main Menu

• Pressing the Main/Menu rotary at any time will take you to the PRX900’s main menu. Here, users can access the main

menu functions of the PRX900.

• Gain adds preamp gain to the system to support microphone usage. PRX900’s fader runs standard in LINE LEVEL, but

accessing the GAIN menu can allow users to plug a microphone in directly.

• Press The Channel knob to access the Gain menu for that channel.

• Once in the gain menu, turn the main knob to adjust the gain to your desired levels.

• dbx DriveRack Output - DriveRack is a line of hardware products produced by Harman’s dbx brand. These rack mount

signal processors provide detailed control for nal processing and crossovers before feeding the mix to one or more

speakers. This DriveRack functionality embedded into PRX900 is designed to optimize the combination of speaker and Mix

Output built into this JBL speaker.

• AFS by dbx, or automatic feedback suppression, is a combination of processing that can enable the user to add up to

3 dB more total gain to their output before getting audio feedback back in through the mix inputs. AFS does this using

a combination of auto sensing and very tight width parametric EQs before the output master EQ.

• Stage setup best practices are always recommended for best results to avoid feedback, in combination with

the AFS processing system. Microphones have less chance of contributing feedback if they follow the following

position standards on stage:

• Microphones should be behind the front plane of the speakers.

• Microphones should be least two meters to the left or right of the speakers.

• “AFS by dbx” On/Off selection toggles the AFS processor on or off.

• “Reset Filters” will reset all lters, prompting the lters to reset and start over in their discovery of potential feedback

frequency risks.

• The Output EQ is a package of lter adjustments on the main mix before the audio feeds to the amp and speaker. It

includes a collection of easy to select preset curves for common speech and music styles. Each preset can also be loaded

into the Custom preset for detailed user adjustable of output parametric EQ’s. The user has adjustments for individual band

level, frequency, and width (“Q”).

• “Output EQ” On/Off enables or bypasses the current settings in the output EQ processor.

• “Presets” enables rotation of the Main/Menu knob to view and select from the Output EQ presets.

• Scroll the menu to “Presets” and press the MAIN/MENU knob.

• Rotate the MAIN/MENU knob to view the available presets.

• Click the MAIN/MENU knob to load the currently listed preset.

• Users can load the Custom preset, then double click the MAIN/MENU knob to open the Master EQ editing page.

Inside this graph display page you may rotate the MAIN/MENU knob to a specic parametric EQ number and

click the MAIN/MENU knob again to select to edit the gain (plus or minus in dB), lter frequency, or “Q” (i.e.

adjust the lter width.)

• Users can load any preset as a starting point, then scroll down and adjust any setting to load the current

curve as the Custom preset for further editing. A conrmation dialog will appear, warning the user that

doing this will remove the current Custom preset settings and load it with the currently viewed settings.

EASYNAV LCD

Intro to the EasyNav LCD

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JBL-PRX915-NA PRX915 Two-Way 15" 2000W Powered PA System / Floor Monitor with Bluetooth Control