JBL PRX500 User Manual

Also see for PRX500 Series: User guide

Contents

JBL PRX500 User Manual Manual pdf 24 page image

The following levels should be used as a reference if you know the maximum output in dBu of the sourceconnected to the system’s input. For each position stated below there is an input signal level in dBu that isrequired to deliver absolute maximum output of the system.LINELevel Position Input Level Required To Deliver Maximum OutputFull “on” +10 dBu3 o’clock +12 dBu12 o’clock +17 dBu9 o’clock +28 dBuMICLevel Position Input Level Required To Deliver Maximum OutputFull “on” -25 dBu3 o’clock -23 dBu12 o’clock -18 dBu9 o’clock -7 dBuOnly a properly setup system will guarantee maximum performance with a minimum of distortion and feedback.(This is as true for self powered systems as it is for passive systems). An easy rule to follow is: “Everythingshould clip at once.”Following these simple steps will ensure you are getting the optimum performance out of your complete system.1. Once the source has been connected to the input of your mixer, adjust the input sensitivity (or trim) sothat the highest input levels are set to just before clip (or when the input LED just starts to flicker).2. Position the channel fader for that input to 0 dB.3. Position the Master output fader to 0 dB.4. With the “Mic/Line” button set to “Line” (because the system is receiving a line level signal, orcommonly called a +4 dB signal), set the “Level” control to the 12 o’clock position, and adjust until the“overload” LED just begins to flicker. In the case of PRX512Mi and PRX718S the limiter indicatorflickers just as it is functioning.For in depth articles related to gain structure please refer the website where you can find the JBL Sound System+17+12+10+280-18-23-25-70SETTING THE GAIN24(O dBu)* (+4 dBu)**(+2 dBu) (+6 dBu)(+6 dBu) (+10 dBu)(+18 dBu) (+22 dBu)(-26 dBu)*(-24 dBu)(-20 dBu)(-8 dBu)* Input level required to engage limiter function on PRX512Mi** Input level required to engage limiter function on PRX718S