Setting The Sound; Setting The Input Level; Crossover Filters - JBL PA454 User Manual

SETTING THE SOUND

Setting the input level

To match your amplifier's input sensitivity (gain) to your source unit's
output level, we recommend the following procedure:
• Turn the input level control counterclockwise to MIN (minimum).
• Play a dynamic music track through your source unit. Turn the
source unit's volume control to the 3/4 position.
• Turn the input level control dial clockwise towards MAX until
you hear distortion in the music (it's no longer clear), then turn it
counterclockwise until the music sounds clear again. Your input
sensitivity is now set.

Crossover filters

You can adjust your Apex amplifier's filters to suit your listening
preferences and speaker configuration.
The PA454 lets you select no filter (OFF) for a full-range signal, or
engage a high-pass filter (HPF) on the front and rear channels, if
you're powering speakers and have an independently powered
subwoofer in your system. Slide the switch to choose your desired
crossover point.
FRONT – HPF
OFF
11
LEVEL
MIN MAX
60 80 120 OFF
REAR – HPF
60 80 120