NVX JAD900.5 - OPERATION; Status and Protection LEDs; Control Knobs and Filters; Input and Mode Switches

5
OPERATION
Status LEDs (Power and Protect): Power LED will illuminate when the amplier is turned on
and operating normally. Protection LED will illuminate if the amplier shuts down due to a short
circuit, DC offset, or overheating.
Remote Level Control: Input adaptor for connecting a remote bass control knob. (Included)
HPF Variable Control: This is a separate low frequency lter that can be adjusted anywhere
from 40Hz - 4kHz (front) and 40Hz - 400Hz (rear). This control function is useful for removing low
bass frequencies to prevent damage to the small full range speakers.
LPF Variable Control: The variable crossover control on the side panel of the amplier allows
you to adjust the crossover frequency from 80Hz - 4kHz (front) and 20Hz - 220Hz (subwoofer).
We recommend starting at the midpoint setting (250Hz front and 100Hz subwoofer) and turn
clockwise for greater mid-bass frequencies or counterclockwise for reduced mid-bass output.
Subsonic Filter: Crossover that restricts damaging ultra-low frequency notes from reaching
speakers incapable of reproducing notes below (20Hz - 38Hz). Clockwise turn increases the
frequency lter and counterclockwise reduces the frequency lter.
Level Control: The input gain control is not a volume control. It is possible to have maximum
power output even with the level setting at minimum. To set this level properly turn the source
unit to 80% volume. Next, slowly turn the level control clockwise on the amplier up until you can
hear audible distortion, then turn it down to preferred settings.
Line Level Inputs: The RCA inputs are capable of receiving low-level signals (200mV-6V) from
a source unit, preamplier or equalizer.
Crossover Switch: This manual switch allows you to select either the lowpass or highpass
crossovers and includes the option of deactivating both crossovers.
Source Switch: Set the switch to the SUB position if you are connecting your head unit’s
subwoofer output to the SUB 1 or SUB 2 inputs. Set the switch to the INT position if you are
sending a full range signal to the full range inputs (FL, FR, RL, RR) and not connecting anything
to the SUB inputs. In the INT position, the amplier will lter the bass frequencies from the full
range signal and send them to the subwoofer amplier channel.
Channel Mode Switch (4CH/ST): Set the switch to 4CH if you are using four channel outputs
from your head unit to the FL, FR, RL, RR inputs on the amplier. Set the switch to ST (stereo)
mode if you are using two channel outputs from your head unit. In the ST position, the amplier
will take the signal input to the FL and RR inputs and send the same signals also to the RL and
RR amplier channels.
The Band-Pass Filter (BPF) allows you to run your components in an active setup, where the
passive crossovers are eliminated and the electronic crossovers on the amplier take over. To
take advantage of this feature, move the switch on the amplier to the BPF position, and set the
LPF and HPF to your preference.