Advanced Bass Control Section; Subwoofer Output; "Out Filter"; Infrasonic Filter / Parametric Bass Equalizer - JL Audio 500/1 v2 Owner's Manual

3) "Out Filter": The preamp output is
filtered by a fully variable, active filter
incorporated into the output section
and is not affected by the bass control
processing selected for the amplifier. In
"Out Filter" mode, the user can select:
a) High-pass ("HP") or low-pass ("LP")
+12VDC Ground Remote Preamp Output Section
filtering by way of the "Filter Mode" switch.
Output Mode
b) 12 dB/octave or 24 dB/ octave filter slope by
Full Range | Amp Filter | Out Filter
way of the "Filter Slope" switch.
c) A filter cutoff frequency between 40 - 200
500 /1
v2
Hz for the preamp output signal by way of
Monoblock Subwoofer Amplifier
the "Filter Control" switch.
Left Output Right Output
This is completely independent of the
amplifier's internal filter and allows the user to
match, stagger or overlap the subwoofer low-pass
filter frequency of the amplifier crossover with
the output filter's frequency for precise control
and optimized midbass performance.
If you would like to select the filter frequency
with a higher level of precision, consult
Appendix C: Chart A-2 (page 16) of this manual.
!!
C AU TI ON
The signal level of the "Preamp Output" is
always low level regardless of the voltage
applied to this amplifier's inputs and the
setting chosen on this amplifier's "Input
Range" switch. All "Slave" amplifiers should
have their switches set to "Low". See Appendix
D (page 18) for details.
10 | JL Audio - 500/1 Owner's Manual
v2

adVanCed bass Control seCtion

+12VDC Ground Remote Preamp Output Section
The 500/1v2 includes a versatile bass
Output Mode
processing section consisting of two
Full Range | Amp Filter | Out Filter
primary components: a fully variable,
24 dB per octave infrasonic filter and a
500/1
v2
parametric, single-band equalizer.
Monoblock Subwoofer Amplifier
Left Output Right Output
Infrasonic Filter "Q" Center Freq.
1.6 40
Filter Slope Mode
1.1 2.7 30 60
0.7 25 75
12dB | 24dB Off | On
0.5 4.3 20 80
65 30
Filter Mode Bass EQ
55 80 22 45
45 100 18 55
LP | HP Off | On
40 200 15 60
Filter Freq. (Hz) Infrasonic Freq. (Hz) Remote Bass Port
1) "Infrasonic Filter": The infrasonic filter is a
24 dB/octave high-pass filter, with a fully
variable cutoff frequency between 15 - 60 Hz.
When set at frequencies lower than 30 Hz, it
conserves amplifier power without audibly
affecting the quality of the sub-bass output. If
set at frequencies higher that 30 Hz, there will
be an audible effect, but one which may be
desirable for SPL competition purposes or curve
shaping of a bottom-heavy system. With ported
enclosures, the use of the infrasonic filter is
highly recommended to protect the speaker(s)
from excessive excursion below box tuning.
With sealed enclosures, the use of the filter is
less necessary, but can still help protect the
speaker system. If you would like to select the
infrasonic filter frequency with a higher level of
precision, consult Appendix C: Chart A-3 (page
17) of this manual. The infrasonic filter can be
completely defeated by selecting the "Off"
position on the "Mode" switch. This bypasses
all signal from flowing through the circuit.
Infrasonic Filter "Q" Center Freq.
2) Parametric Bass Equalizer: The parametric 1.6
Filter Slope Mode
1.1 2.7 30
equalizer allows the user to select the center
0.7 25
12dB | 24dB Off | On
0.5 4.3 20
frequency of the boost band as well as the
65 30
Filter Mode Bass EQ
55 80 22 45
bandwidth ("Q") of the boost band. The "Q"
45 100 18 55
control selects the bandwidth of the boost
LP | HP Off | On
40 200 15 60
around the center frequency. Lower numbers
Filter Freq. (Hz) Infrasonic Freq. (Hz) Remote Bass Port
pertain to wider bandwidths while higher
Amp LP Filter Amplifier Input Section
Boost (dB)
+10 number pertain to narrower bandwidths.
Mode | Slope Input Voltage Input Sens. Signal Sensing
+4 +13
The "Center Freq." control selects the center
Off | 12dB | 24dB Low | High Off | On
0 +15
frequency of the boost bandwidth within
65
55 80
a range of 20 - 80 Hz. If you would like to
Advanced
Bass
45 100
select the filter frequency with a higher level
Control
40 200
of precision, consult Appendix C: Chart A-4
Filter Freq. (Hz) Left Ch. Right Ch.
(page 17) of this manual. The "Boost" control
determines how much boost (in dB) you are
adding to the bass signal. A range of 0 - 15dB
of boost is available. The "Remote Bass Port"
allows the connection of an optional remote
boost knob (the RBC-1) that can be mounted
in the front of the vehicle. This optional
control takes the place of the "Boost" knob on
the amplifier when connected and bypasses the
"Boost" control on the amplifier.
!
IMPORTANT
The "Advanced Bass Control" section will only
operate when the amplifier's filter is activated
with the "Amp LP Filter" switch in the "12dB"
or "24dB" position. It will not work with this
switch in the "Off" position. This is to prevent
cascading the processing of multiple amplifiers
when configured in a master/Slave
arrangement as shown in Appendix D (page
18). If you are using an external active
crossover and would like to use the "Advanced
Bass Control" features, set the "Amp LP Filter"
switch on "12dB" and rotate the frequency
selection knob fully clockwise to the "200 Hz"
position. This will activate the "LF Boost" and
"Infrasonic Filter" controls without
significantly affecting the crossover point
selected by the external active crossover.
Amp LP Filter Amplifier Input Section
Boost (dB)
40 +10
Mode | Slope Input Voltage Input Sens. Signal Sensing
60 +4 +13
75
Off | 12dB | 24dB Low | High Off | On
80 0 +15
65
55 80
Advanced
Bass
45 100
Control
40 200
Filter Freq. (Hz) Left Ch. Right Ch.

Subwoofer Output

subwooFer outPut
Regulated, Intelligent Power Supply (R.I.P.S.)
MONO OUTPUT ONLY design. This sophisticated power supply
allows the amplifier to produce its optimum
power (500 watts x 1) over a wide range of
speaker impedances.
a specific impedance to produce optimum
power, the R.I.P.S.-equipped 500/1v2 gives
you the freedom to use a variety of subwoofer
configurations that achieve final nominal
impedances between
1.5 – 4Ω (without sacrificing power output or
sound quality).
entirely automatic and adjusts itself every time
the amplifier is turned on according to the lowest
impedance present at the speaker load. There are
no user controls to configure. The system
operates through multiple stages of impedance
optimization, choosing the stage most appropriate
to the actual impedance of the speaker(s) you
connect to it.
!
If you connect a load higher than 4Ω nominal
to the 500/1v2, power will drop by half with
every doubling of impedance above 4Ω. If you
connect a load lower than 1.5Ω nominal to the
500/1v2, the amplifier protection circuitry
activates a "safe" mode which reduces amplifier
power to protect the circuitry from failure (the
yellow LED on the top of the amplifier will
light to indicate that this has happened). See
page 12 for details.
Subwoofer Output
MONO OUTPUT ONLY
The 500/1v2 employs JL Audio's exclusive
Unlike conventional amplifiers that require
The operation of the R.I.P.S. circuitry is
IMPORTANT
11