Important – JL Audio 1000/1v2 User Manual

Page 6

10 | JL Audio - 1000/1

Owner’s Manual

subwooFer outPut

The 1000/1v2 employs JL Audio’s exclusive

Regulated, Intelligent Power Supply (R.I.P.S.)
design. This sophisticated power supply
allows the amplifier to produce its optimum
power (1000 watts x 1) over a wide range of
speaker impedances.

+12VDC

Ground Remote

Preamp Output Section

Infrasonic Filter

“Q”

Center Freq.

Boost (dB)

Amp LP Filter

Advanced

Bass

Control

Amplifier Input Section

Subwoofer Output

MONO OUTPUT ONLY

Left Output

Right Output

Left Ch.

Right Ch.

Filter Freq. (Hz)

Infrasonic Freq. (Hz)

Remote Bass Port

Full Range | Amp Filter | Out Filter

Output Mode

Filter Slope

Mode

Mode | Slope

Input Voltage

Input Sens.

Output Polarity

12dB | 24dB

Filter Mode

LP | HP

Bass EQ

Off | On

Off | 12dB | 24dB

Low | High

Normal|Reversed

Off | On

120

200

100

200

0.5

0.7

1.1

1.6

2.7

4.3 20

+10

+13

+15

1000/1

Monoblock Subwoofer Amplifier

Unlike conventional amplifiers that require

a specific impedance to produce optimum
power, the R.I.P.S.-equipped 1000/1v2 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).

The operation of the R.I.P.S. circuitry is

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.

IMPORTANT

If you connect a load higher than 4Ω nominal

to the 1000/1v2, power will drop by half with

every doubling of impedance above 4Ω. If you

connect a load lower than 1.5Ω nominal to the

1000/1v2, 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.

IMPORTANT

Speaker loads below 1.5Ω nominal are not

recommended and may cause the amplifier

output to distort excessively.

Speaker connections to the 1000/1v2 are

straightforward and take place at the far right of
the front panel. You will notice that there are two
“+” positive connections and two “–” negative
connections. This is to facilitate multiple speaker
wiring. The two positive and two negative
connections are connected in parallel inside
the amplifier. Connecting two speakers, each to
one set of positive and negative terminals, will
result in a parallel speaker connection. If only
connecting one pair of speaker wires, it is not
necessary to use both sets of connections.

Do not chassis ground any speakers connected

to this or any other JL Audio amplifier. Doing so
will cause the amplifier to go into protection and
mute the output.

The 1000/1v2’s speaker connectors are

designed to accept 12 AWG – 8 AWG wire.

To connect the speaker wires to the amplifier,

first back out the set screws on the top of the
amplifier, using the supplied 2.5 mm hex
wrench. Strip 1/2 inch (12 mm) of insulation
from each wire and insert the bare wire end
into the receptacles on the front panel of the
amplifier, seating them firmly so that no bare
wire is exposed. While holding each wire in place,
tighten each set screw firmly, taking care not to
strip the head of the screw and making sure that
the wire is firmly gripped by the set screw.

IMPORTANT

Do NOT attempt to “bridge” two 1000/1v2’s or

combine their output to a single load in any

manner. Doing so will damage the amplifier(s).

IMPORTANT

Before reconnecting the battery ground and

turning the system on, verify that all control

settings on the amplifier are set according to

the needs of the system.

adVanCed bass Control seCtion

The 1000/1v2 includes a versatile bass

processing section consisting of two
primary components: a fully variable,
24 dB per octave infrasonic filter and a
parametric, single-band equalizer.

+12VDC

Ground Remote

Preamp Output Section

Infrasonic Filter

“Q”

Center Freq.

Boost (dB)

Amp LP Filter

Advanced

Bass

Control

Amplifier Input Section

Subwoofer Output

MONO OUTPUT ONLY

Left Output

Right Output

Left Ch.

Right Ch.

Filter Freq. (Hz)

Infrasonic Freq. (Hz)

Remote Bass Port

Full Range | Amp Filter | Out Filter

Output Mode

Filter Slope

Mode

Mode | Slope

Input Voltage

Input Sens.

Output Polarity

12dB | 24dB

Filter Mode

LP | HP

Bass EQ

Off | On

Off | 12dB | 24dB

Low | High

Normal|Reversed

Off | On

120

200

100

200

0.5

0.7

1.1

1.6

2.7

4.3 20

+10

+13

+15

1000/1

Monoblock Subwoofer Amplifier

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.

2) Parametric Bass Equalizer: The parametric

equalizer allows the user to select the center
frequency of the boost band as well as the
bandwidth (“Q”) of the boost band. The “Q"
control selects the bandwidth of the boost
around the center frequency. Lower numbers
pertain to wider bandwidths while higher
number pertain to narrower bandwidths.
The “Center Freq.” control selects the center
frequency of the boost bandwidth within
a range of 20 - 80 Hz. If you would like to
select the filter frequency with a higher level
of precision, consult Appendix C: Chart A-4
(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.