JL Audio 505 5

Depending on the speaker system and the

“12dB”: Configures the filter for that pair of

Subwoofer Channel Filter:

benefits from the 12 dB per octave slope which lets

vehicle, different filter slopes may be required to

channels to attenuate frequencies below the

The 500/5's subwoofer channel filter (located in

more upper bass content pass through. A sub that

produce a smooth transition between the sound of

selected filter frequency at a rate of 12dB per

the “Subwoofer Channel Control Section”

fires directly into the listening environment is more

different speakers in the system. Experiment to find

octave (Butterworth alignment).

employs an advanced state-variable, low-pass active

likely to benefit from a 24 dB per octave slope.

the slope which best matches the acoustic

“24dB”: Configures the filter for that pair of

filter. This feature is designed to attenuate

The above hint is not a “set-in-stone” rule…You

requirements of the system.The sharper “24dB”

channels to attenuate frequencies below the

frequencies above its filter frequency, so that the

should always listen to the system carefully to

setting will do a better job of protecting small

selected filter frequency at a rate of 24dB per

system's subwoofers do not reproduce any audible

determine the best choice as vehicle acoustics and

speakers with limited power handling.The shallower

octave (Linkwitz-Riley alignment).

midrange content.The low-pass filter in the 500/5 is

other factors play a big role in choosing the most

“12dB” octave setting allows the front speakers to

Depending on the speaker system and the

fully variable between 40 Hz and 200 Hz via the

appropriate filter slope.

reproduce more content below the cutoff frequency.

vehicle, different filter slopes may be required to

“Filter Freq.” control knob and features the ability

2) “Filter Freq. (Hz)” The filter frequency

3) “Freq. Range” Control: When thrown to

produce a smooth transition between the speakers

to select between a moderate “12dB” per octave

markings surrounding this rotary control are for

the right, this switch multiplies the cutoff

in the system. Experiment to find the slope which

or a steep “24dB” per octave slope.

reference purposes and are generally accurate to

frequency selected by the rotary “Filter Freq.

best matches the acoustic requirements of your

within 1/3 octave or better. If you would like to

(Hz)” control by a factor of 10. In the “x1”

system.The sharper “24dB” setting will do a better

Subwoofer Channel

Control Section

select the filter cutoff frequency with a higher level

Infrasonic Filter

Input From:

Input Voltage

Input Sens.

Sub LP Filter

position, the range of the rotary control is

job of protecting small speakers with limited power

of precision, consult “Chart A2” in Appendix A of

50 - 500 Hz (as marked). In the “x10”

handling.The shallower “12dB” octave setting

this manual (page 20).

Off/30Hz

Ind./F+R/Front

Low/High

Off/12dB/24dB

position, the range of the rotary control is

allows the rear speakers to reproduce more low-

+10

500 Hz - 5 kHz (5000 Hz).

frequency content.

+13

PREAMP OUTPUT SECTION

4) “Filter Freq. (Hz)” The filter frequency

If you are using the 500/5 in tri-amp mode,

Left

Right

The 500/5 incorporates a flexible preamp

markings surrounding this rotary control are for

these rear filter controls will determine the

Remote Bass

LF Boost (dB)

output section, permitting additional amplifiers

Port

Independent Sub Input

Filter Freq. (Hz)

reference purposes and are generally accurate to

tweeter crossover frequency and slope. We

to be added to the system.This pre-amp output

within 1/3 octave or better. If you would like to

recommend that you use the sharper “24dB”

1) “Sub LP Filter”: This switch, located in the

can be configured three different ways using

select the filter cutoff frequency with a higher level

position for most tweeters.

Subwoofer Channel Control Section, configures the

the switch labeled “Signal From” in the

of precision, consult the charts in Appendix A

2) “Freq. Range” Control: When thrown to the

low-pass filter for the subwoofer channel into one

“Preamp Output Section”.

(page 20) of this manual.

right, this switch multiplies the cutoff frequency

of three modes.

selected by the rotary “Filter Freq. (Hz)” control by

“Off”: Defeats the filter for the subwoofer

Preamp Output Section

Signal From

Infras

Rear Filter Section:

a factor of 10. In the “x1” position, the range of the

channels completely, allowing the full range of

The rear channels of the 500/5 can be

rotary control is 50 - 500 Hz (as marked). In the

frequencies present at the input to feed the sub

Sub LP/F+R Inputs/Front

operated through the amplifier's built-in rear high-

“x10” position, the range of the rotary control is

channel.This is useful for systems utilizing outboard

pass filter.This attenuates frequencies below the

500 Hz - 5 kHz (5000 Hz).

crossovers. Keep in mind that defeating the “Sub LP

one selected by the “Filter Freq.” control in the

3) “Filter Freq. (Hz)” The filter frequency

Filter” also defeats the “LF Boost” and “Infrasonic

Rear Filter Section.

markings surrounding this rotary control are for

Filter”.With the “Sub LP Filter” defeated (“Off”), the

Left Ch. Right Ch.

Rem

reference purposes and are generally accurate to

subwoofer channel's upper frequency response limit

50Wx1)

Rear Filter Section

1) “Sub LP”: The preamp output delivers the

within 1/3 octave or better. If you would like to

is 500 Hz, due to its bass-specific Class D design.

Freq. Range

High-Pass Filter

Input Volt

select the filter cutoff frequency with a higher level

“12dB”: Configures the filter for the subwoofer

same mono-summed signal that is feeding the

of precision, consult “Chart A1” in Appendix A

channel to attenuate frequencies above the selected

500/5's subwoofer channel when the “Sub LP”

x1/x10

Off/12dB/24dB

Low/Hi

low-pass

(page 20) of this manual.

filter frequency at a rate of 12 dB per octave

mode is engaged, including all the low-pass filtering,

Also sets

cutoff for

Front Ch.

(Butterworth alignment).

“LF Boost” and “Infrasonic Filter” processing that is

filter (when

Bandpass

selected)

“24dB”: Configures the filter for the subwoofer

selected. This mode is useful for feeding an

Filter Freq. (Hz)

Left C

channel to attenuate frequencies above the selected

additional (slave) subwoofer amplifier (the JL Audio

filter frequency at a rate of 24 dB per octave

250/1 matches the 500/5’s subwoofer channel

1) “High-Pass Filter” Control: This switch allows

(Linkwitz-Riley alignment).

perfectly). For more information on adding

you to defeat the Rear Channel Filter or select from

Depending on the subwoofer system and the

additional subwoofer amplifiers in master / slave

two different filter slopes.

vehicle, different slopes may be required to produce

mode, please refer to Appendix C on page 24.

“Off”: Defeats the filter completely, allowing the full

a smooth transition to the midbass speakers in the

2) “F+R Inputs” (Front + Rear): This is a pass-

range of frequencies present at the inputs to feed

system. Experiment to find the slope which best

through mode for the preamp output, delivering a

that pair of channels.This is useful for systems

matches the acoustic requirements of your system.

sum of the signals being fed to the “Front Input

utilizing outboard crossovers or requiring full-range

Hint: A trunk mounted sub whose output has to

Section” and “Rear Input Section” of the amplifier

reproduction from these channels.

“fight” through a rear deck or a back seat often

(If the input signal is full-range, the preamp output

JL AUDIO 500/5