JL Audio 505 4

TURN-ON LEAD

CROSSOVER CONTROLS

The 500/5 uses a conventional +12V remote

rotary control will operate within that window. If

any amplifier in the system beyond the maximum

Crossovers are groups of individual electronic filters

turn-on lead, typically controlled by the source unit's

you are using an aftermarket source unit, with

level established during the procedure outlined in

which allow only certain frequency ranges to pass

remote turn-on output.The amplifier will turn on

conventional preamp-level outputs, this is most likely

Appendix B (page 22). Doing so will result in

through them by attenuating frequencies outside

when +12V is present at its “Remote” input and

the position that you will use.

audible distortion and possible speaker damage.

the selected range.These filters allow the user to

turn off when +12V is switched off. If a source unit

The “High” position on each “Input Voltage”

Be aware that all three “Input Sens.”

specify what frequency range will be sent out of

does not have a dedicated remote turn-on output,

switch selects an input sensitivity range between

adjustments will have to be made, regardless of

each channel section of the amplifier.This, in turn,

the amplifier’s turn-on lead can be connected to

800mV and 8V.This is useful for certain high-output

how many input cables are feeding the amplifier.

allows each speaker system to only reproduce a

+12V via a switch that derives power from an

preamp level signals as well as speaker-level output

These controls will allow you to set the

range of frequencies it is well-suited for, resulting in

ignition-switched circuit.

from source units and small amplifiers.To use

appropriate relative levels for the Front, Rear and

reduced distortion and improved fidelity.

The 500/5's “Remote” turn-on connector is

speaker-level sources, splice the speaker output

Subwoofer Channels.

designed to accept 18 AWG – 8 AWG wire. 12

wires of the source unit or small amplifier onto a

Front Filter Section:

AWG is more than adequate for this purpose.

pair of RCA plugs.

Subwoofer “Input From” Selection:

To connect the remote turn-on wire to the

Located to the left of the “Input Voltage” switch

Wx2)

Front

Filter Section

Fro

amplifier, first back out the set screw on the top of

IMPORTANT

in the “Subwoofer Channel Control Section” is a

Freq. Range

Filter Slope

Input

the amplifier, using the supplied hex wrench. Strip

The output of the amplifier will decrease for a

switch labeled “Input From”.This switch

x1/x10

12dB/24dB

Low

given input voltage when the “Input Range” switch

1/2 inch (12mm) of wire and insert the bare wire

determines whether the subwoofer channel will

Filter Mode

into the receptacle on the front panel of the

is placed in the “High” position. Conversely, the

receive its input from the “Independent Sub Input”

amplifier, seating it firmly so that no bare wire is

output will be higher with the switch in the “Low”

jacks (select “Ind.”) or from a sum of the Front and

Off/BP/HP

exposed.When using smaller wire, it may be

position.While this may sound counter-intuitive, it is

Rear Channel Input signals (select “F+R”) or from

HP Filter Freq.(Hz)

necessary to strip 1 inch of insulation from the wire

consistent with the descriptions above.

the Front Channel Inputs only (select “Front”).

1) “Filter Mode” Control: Located in the “Front

and fold the bare wire in half prior to insertion.

While holding the wire in the terminal, tighten the

Input Sensitivity Adjustment:

Front and Rear Channel “Input Mode” Selection:

Filter Section”, this switch allows you to configure

set screw firmly, taking care not to strip the head of

Located next to the “Input Voltage” switch in

Located to the right of the rear channel input

the Front Channel filter into one of three modes:

the screw and making sure that the wire is firmly

each input section is a rotary control labeled “Input

jacks in the “Rear Input Section” is a switch

“Off” (Defeated): Defeats the filter for the Front

gripped by the set screw.

Sens.” Once the appropriate “Input Voltage” range

labeled “F/R Input Mode”.This switch determines

Channels completely, allowing the full range of

has been selected, this control can be used to

whether the front and rear channels will receive

frequencies present at the inputs to feed that pair

INPUT SECTIONS

match up the signal level of the system to produce

their input independently (select “4ch”) or from

of channels.This is useful for systems utilizing

Three left/right pairs of RCA type jacks are

the desired level from the amplifier. Rotating the

the “Rear Input Section” jacks only (select “2ch”).

outboard crossovers or requiring full-range

provided for input (one pair for the subwoofer

control clockwise will result in higher sensitivity

reproduction from these channels.

channel, one pair for the rear channels and one pair

(louder for a given input voltage). Rotating the

“BP” (Bandpass): Configures the Front Channel

for the front channels).There are several ways that

control counter-clockwise will result in lower

Filter to attenuate frequencies above the selected

the 500/5's inputs can be configured. Please read the

sensitivity (quieter for a given input voltage.) Be

filter frequency and below the frequency selected in

“System Configurations” section of this manual (page

aware that each of the three “Input Sens.”

the Rear Channel High-Pass Filter. This creates a

14) carefully to determine the proper configuration

adjustments will have to be made, regardless of

true bandpass filter well-suited for driving mid-bass

for your application.

how many inputs are feeding the amplifier.These

or mid-range speakers in a tri-amplified system (see

controls will allow you to set the appropriate

page 18 for details).

Input Voltage Range:

relative levels for the subwoofer channels and the

“HP” (High-Pass): Configures the Front Channel

A wide range of signal input voltages can be

front and rear channels.

Filter to attenuate frequencies below the selected filter

accommodated by each of the 500/5's input stages

frequency. Useful for connection of component

(200mV – 8V).This wide range is split up into two

IMPORTANT

speakers to the front channels in a bi-amplified system.

sub-ranges, accessible via switches located in each

To properly set each set of amplifier channels

2) “Filter Slope” Control: This switch allows you

input section of the amplifier. Be aware that

for maximum clean output, please refer to

to select from two filter slopes.

each input section's “Input Voltage” switch

Appendix B (page 22) in this manual. After using

“12dB”: Configures the Front Channel Filter to

will have to be configured, regardless of

this procedure, you can then adjust the relative

attenuate frequencies below the selected filter

how many inputs are actually feeding the

level of each channel pair by adjusting the input

frequency at a rate of 12 dB per octave

amplifier.

sensitivity downward on either or both channel

(Butterworth alignment).

The “Low” position on each “Input Voltage”

pairs, if they require attenuation to achieve the

“24dB”: Configures the Front Channel Filter to

switch selects an input sensitivity range between

desired system balance.

attenuate frequencies below the selected filter

200mV and 2V.This means that the Input Sensitivity

Do not increase the “Input Sens.” setting for

frequency at a rate of 24 dB per octave (Linkwitz-

Riley alignment).

JL AUDIO 500/5