JL Audio CR-1 User manual

Owner’s Manual
Active Subwoofer Crossover

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IMPORTANT SAFETY INSTRUCTIONS
1) Read the Instructions — All safety and operating instructions should be read
before the device is operated.
2) Retain the Instructions — e safety and operating instructions should be
retained for future reference.
3) Heed Warnings — All warnings on the device and in the operating
instructions should be followed.
4) Follow Instructions — All operating and use instructions should
be followed.
5) Water and Moisture — e device should NOT be used near water – for
example, near a bathtub, washbowl, sink, laundry tub, in a wet basement, near
a swimming pool, etc.
6) Ventilation — e device should be situated so that its location or position
does not interfere with its proper ventilation.
7) Heat and Flames — e device should be situated away from heat sources
such as radiators, heat registers, stoves, replaces, or other devices which
produce heat.
8) Power sources — e device should only be connected to a power supply of the
type described in the operating instructions or as marked on the product.
9) Power Cord Protection — Power-supply cords should be routed so that they
are not likely to be walked on or pinched by items placed upon or against
them, paying particular attention to cords at plugs, convenience receptacles,
and the point where they exit the device.
10) Cleaning — e device should be cleaned only as recommended in the
operating instructions.
11) Nonuse Periods — e power cord of the device should be unplugged from
the outlet when the device is le unused for long periods of time.
e lightning ash with arrowhead
symbol, within an equilateral triangle, is
intended to alert the user to the presence
of uninsulated “dangerous voltage” within
the product’s enclosure that may be of
sucient magnitude to constitute a risk of
electric shock to persons.
WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK,
DO NOT EXPOSE THIS PRODUCT TO RAIN OR MOISTURE.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE
COVER. NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO
QUALIFIED PERSONNEL.
e exclamation point within an
equilateral triangle is intended to alert the
user to the presence of important operating
and maintenance instructions in the
literature accompanying the product.

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12) Lightning and Power Surges — To prevent damage due to power surges, we
recommend that you disconnect the device from the electrical outlet during
electrical storms and/or recurring power interruptions.
13) Object or Liquid Entry — Care should be taken so that objects do not fall
into and liquids are not spilled onto the device. Do not expose the device to
dripping or splashing from liquids. Do not place objects lled with liquids on
top of, or near the device, for example: ower vases, beverages, liquid-fueled
lamps, etc.
14) Damage Requiring Service — e device should be serviced by qualied
service personnel when:
a. the power-supply cord or plug has been damaged
b. objects have fallen or liquid has been spilled into the device
c. the device has been exposed to rain
d. the device does not appear to operate normally or exhibits a marked
change in performance
e. the device has been dropped or has been physically damaged
15) Servicing — e user should not attempt to service the device beyond what is
described in the operating instructions. All other servicing should be referred
to qualied service personnel.
16) Overloading — Do not overload wall outlets, extension cords, or outlet strips
as this can result in a risk of re or electric shock.
17) Grounding — is device is supplied with a three-prong, grounded power
cord. Precautions should be taken so that the grounding means of the device
are not defeated. Defeating the grounding prong on the device power cord
could increase the risk of electric shock and could result in permanent
damage to the device’s electronics.

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FCC COMPLIANCE STATEMENT
NOTE: is equipment has been tested and found to comply with the limits of Part 15 of the FCC
Rules. ese limits are designed to provide reasonable protection against harmful interference in
a residential installation. is equipment generates, uses and can radiate radio frequency energy
and, if not installed in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or television reception,
which can be determined by turning the equipment o and on, the user is encouraged to try to
correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit dierent from that to which the
receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
TABLE OF CONTENTS
Important Safety Instructions: ......................................... 2-3
Introduction:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Product Overview:...................................................... 5
Package Contents and Placement Considerations:........................... 6
Front Control Panel Layout:.............................................. 7
Rear Control and Connections Panel Layout:............................... 7
Front Panel Controls in Detail: ........................................ 8-11
Rear Panel Control and Connections in Detail: ......................... 12-13
Connection Scenarios and Diagrams: ................................. 14-19
Setup Guides: ...................................................... 20-23
Frequently Asked Questions: ............................................ 24
Troubleshooting: ...................................................... 24
Limited Warranty / Service Information: ................................. 25
Installation Notes: ...................................................26-27
Features and Specications: ............................................. 28
INTRODUCTION
ank you for purchasing a JL Audio CR-1 active subwoofer crossover.
Your CR-1 has been designed and built in the U.S.A. by a passionate team
of audio professionals with vast experience in signal processing and a complete
commitment to “ahead of the curve” audio performance.
Please read this manual thoroughly in order to correctly integrate and achieve
the highest level of performance with your CR-1. Once your CR-1 is dialed in
and you are enjoying new levels of performance from your audio system, you will
wonder how you ever lived without one.
Enjoy.

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PRODUCT OVERVIEW
CR-1 acts an audiophile-grade “bridge”, seamlessly connecting a two-channel
audio system with a top-ight, powered subwoofer system. Powerful features and
a pristine, all-analog signal path make it a key component in optimizing an audio
system’s spatial and spectral performance. To minimize distortion and noise,
CR-1 employs top-grade component parts in its all-analog audio circuitry: 1%
precision resistors, JFET-input audio-grade op-amps, polypropylene lm-and-foil
capacitors and metallized-polypropylene lm capacitors, to name just a few. is
attention to component quality makes CR-1 a worthy partner to the nest audio
preampliers and ampliers.
CR-1’s input-output design makes it equally adaptable to studio, mastering
suite or audiophile, two-channel playback environments. Inputs and outputs are
provided for balanced (XLR or 1/4-inch TRS) and unbalanced (RCA) sources.
Independent buering of balanced and unbalanced outputs is employed, to
reduce the likelihood of noise. JL Audio’s dierential input technology eectively
rejects common-mode hum and noise on the unbalanced inputs.
From the CR-1’s stereo inputs, you can derive either a single “mono” (Le
+ Right) subwoofer signal, or separate signals, for separate le and right
subwoofers. A front-panel switch allows you to select between these modes.
e CR-1’s crossover functionality is built around two banks of high
precision, low-pass and high-pass Linkwitz-Riley lters. ese can be set as
12 dB/octave (moderate cuto slope) or 24 dB/octave (steeper cuto slope), via
a front-panel switch. For each lter pair, the cuto frequency is fully variable
from 30 Hz – 150 Hz via rotary controls. Behind these knobs, multiplying DACs
with monolithic ratio matching are employed to adjust the analog circuit’s lter
frequencies. is digitally–controlled, analog lter circuitry allows for high
precision in making frequency adjustments and facilitates precise matching
between the le and right channels for the ultimate in crossover delity and
transparency. e CR-1 oers 167 individual cuto frequency choices between
the 30 Hz and 150 Hz limits, in 0.70 Hz steps.
Another of CR-1’s unique and powerful features is the ability to alter the
damping behavior of each lter bank. Properly used, the CR-1’s damping controls
can improve the acoustic summing through the crossover region, compensating for
each speaker system’s frequency response and the way they acoustically interact.
At the center of the CR-1’s front panel, a convenient balance control permits ne
level adjustment of the subwoofer and satellite speakers, relative to one another.
is is useful for tweaking the sub/satellite balance to compensate for listening
conditions or program material, while always being able to easily return to the
reference setting. Each of the CR-1’s output channels can also be independently
muted via front-panel switches to aid in system setup and troubleshooting.
To facilitate sharing your subwoofer(s) between a home theater system and
a dedicated 2-channel system, the CR-1 has a special bypass feature, accessible
via a front-panel switch. When this bypass is engaged, the CR-1 will pass signals
connected to its dedicated managed bass inputs, completely bypassing the CR-
1’s crossover circuitry and level controls. is allows you to use your room’s
subwoofers for both 2-channel audio (via the CR-1’s bass management) and
multichannel audio (via your pre-pro or receiver’s bass management).
As you can see from this brief introduction, the CR-1 packs a lot of useful
technology and functionality. Please read the following sections thoroughly to
properly connect and set up your CR-1.

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Package Contents
e CR-1 Active Subwoofer Crossover is shipped from the factory with:
• Owner’s Manual
• IEC power cord (3-prong)
• 4 ea. RCA Shorting Plugs
• 2 ea. Rack-mounting ears. Installation requires the use
of a 4mm hex wrench (not included)
Placement Considerations :
Table-Top: e CR-1 ships from the factory congured as a “table-top”
component, including rubber feet. To use it in table-top mode, simply place
the unit in your equipment stand where it will be convenient to use and where
cable management will be optimized (a signicant number of audio cables will
typically be connected to the CR-1).
e CR-1 chassis is very robust and can easily support the weight of most
source components and signal processors. However, we do not recommend
placing heavier equipment, such as ampliers or receivers directly onto the CR-1.
We also do not recommend placing the CR-1 directly on top of a power amplier
or receiver, as the heat generated by those components could aect the CR-1.
Whenever possible, place the CR-1 on its own shelf or surface.
Rack-Mount: e CR-1 can be rack mounted in a standard 19-inch equipment
rack, through the use of the included rack-mount accessory kit. When installed
in a rack, the CR-1 occupies two (2) rack-units of space.
To convert the CR-1 for rack mounting:
1. Unscrew the rubber feet from the bottom of the CR-1.
2. Remove the 4 mm hex-head screws that secure the end covers of the front panel
3. Using the same hex-head screws removed in Step 2, attach the rack ears to
each end of the front panel, as shown in the diagram on this page.
Do not overtighten.
4. CR-1 is now ready to be installed into an equipment rack.
5. To protect the nish of the rack-mount ears, we recommend the use of
nylon washers between the rack-mounting screws and the front surface of
the rack-mount ears.
We do not recommend rack-mounting the CR-1 directly on top of a power
amplier or receiver, as the heat generated by those components could aect the CR-1.
Rack Ears
End Covers

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Rear Controls and Connections Panel
Front Control Panel
Crossover
Function
page 8
Power
page 8
Subwoofer
Output Mode
page 9
Sub. Filter
Frequency
page 10
Sub/Sat
Balance
page 10
Subwoofer
Damping
page 11
Satellite
Damping
page 11
Crossover
Slope
page 9
Balanced XLR/TRS
Stereo Inputs
page 12
Balanced XLR/TRS
Managed Bass
Inputs
page 12
Fuse
page 13
Unbalanced
Satellite
Outputs
page 13
Unbalanced
Subwoofer
Outputs
page 13
Unbalanced
Stereo Inputs
page 12
Unbalanced
Managed Bass
Inputs
page 12
Managed Bass
Input Type
Switch
page 12
IEC-Style AC
Connector
page 13
XLR Balanced
Satellite
Outputs
page 13
TRS Satellite
Outputs
page 13
TRS Balanced
Subwoofer
Outputs
page 13
Ground Lift
Switch
page 13
Sat. Filter
Frequency
page 10
Output
Muting
page 10
XLR Balanced
Subwoofer
Outputs
page 13

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FRONT PANEL CONTROLS IN DETAIL
Power switch
e power ( ) switch turns the AC power o ( ) or on ( ). When
the power switch is in the “o” mode, it completely interrupts voltage
from reaching the CR-1’s circuitry. e LED next to the power switch is
unlit when the power is o. When the CR-1’s power switch is in the “on”
( ) position, the CR-1’s circuitry is activated and the LED next to the
power switch will light up GREEN. ere is no auto turn-on mode.
Because the CR-1 is an audiophile-grade, analog device, its circuitry
can benet from reaching equilibrium aer turn-on, much like other
high-end audio equipment. Aer the unit has been o, a brief period
of warm up (several minutes) is desirable for best sonic performance.
Unless you will not be using the CR-1 for an extended period of time,
we recommend that you leave the power switch on. e CR-1 draws
a small amount of power when on: approximately 26 watts.
Crossover Function (Bypass) Button
is feature allows you to share one or more subwoofers between separate
home theater and dedicated 2-channel stereo systems. is functionality can also
allow you to share main le and right loudspeakers between the two setups.
With your 2-channel preamplier connected to the CR-1’s “Main Stereo
Inputs”, and your home theater preamp/processor or receiver’s Subwoofer
Output connected to the CR-1’s “Managed Bass Inputs”, the CR-1 will act as a
switch between 2-channel and multi-channel listening modes, via the “Crossover
Function” switch.
When the Crossover Function is set to “On” (Button pressed in, not lighted),
the “Managed Bass Inputs” are completely disconnected and the CR-1 receives
its input signals only from its “Main Stereo Inputs” and outputs low-pass-ltered
signals via its “Outputs to Subwoofer(s)” and high-pass-ltered signals via its
“Outputs to Satellites”. is is the correct mode for 2-channel listening, and
indicates that the CR-1’s active crossover lters are in-line and functioning.
When the “Crossover Function” switch is set to “Bypass” (button out, lighted
red), the CR-1’s “Managed Bass Inputs” are connected directly to the “Outputs
to Subwoofer(s)”. In this “Bypass” mode, the CR-1’s “Outputs to Satellite
Amplier” will pass signals present at the CR-1’s “Main Stereo Inputs”, with no
processing. Each le or right RCA input passes signal only to the corresponding
le or right RCA output and each XLR/TRS balanced input only sends signal to
its corresponding balanced output. All of the CR-1’s crossover functions and level
controls are completely bypassed in this mode, meaning that whatever signals
are present at the inputs will be passed to the corresponding outputs. Most of the
CR-1’s front panel controls are inoperative in this mode. Only the “Subwoofer
Output Mode” switch and the “Output Muting” buttons will remain functional.
e primary purpose of the “Bypass” mode is to enable your multi-channel
receiver or preamp/processor to handle all bass management for your multi-
channel system. See Connection Scenario #2 for details on this method (page 22).
IMPORTANT: WHEN THE CR1 IS “OFF”, SIGNAL WILL BE PASSED DIRECTLY
FROM THE “MAIN STEREO INPUTS” TO THE “OUTPUTS TO SATELLITE
AMPLIFIER”, WITHOUT FILTERING. THIS ALLOWS YOU TO LISTEN TO YOUR
2CHANNEL SYSTEM IN FULLRANGE MODE, WITH NO SUBWOOFERS, BY
SWITCHING THE CR1 TO “OFF”
IMPORTANT

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Subwoofer Output Mode Switch
e “Subwoofer Output Mode” switch determines whether the low-pass
signal at the subwoofer outputs is in stereo (independent le and right signals), or
if both subwoofer outputs deliver a le + right (mono-summed) signal.
If you are using a single subwoofer, set the Mode Switch to “L+R” to sum both
le and right low-pass signals to mono for the single subwoofer.
If you have a pair of subwoofers, you can decide whether to make them
independent, le and right (“Stereo” Mode), or make them both output the same
mono-summed signal (“L+R” Mode). Experiment with both settings to determine
which works best in your room for 2-channel and multi-channel playback.
Crossover Slope Switch
e “Crossover Slope” switch changes the attenuation slope of the high-pass
and low-pass lters. CR-1 oers a choice between a moderate 12 dB/octave (2nd
order) and a steep 24 dB/octave (4th order) slope. A 24 dB per octave high-pass
lter attenuates signals below its corner frequency at a rate of -24 dB for every
halving of frequency. A 24 dB per octave low-pass lter attenuates signals above
its corner frequency at a rate of -24 dB for every doubling of frequency. e 2nd
order lter setting attenuates at only -12 dB per octave above or below each lter’s
corner frequency. With a steeper roll o slope, there is less “overlap” of acoustical
output between the satellite speakers and the subwoofer.
We recommend using the 24 dB/octave slope as a default, as it permits less
interaction between the main loudspeakers and subwoofers in the crossover
region. e steeper 24 dB/octave lter also does a better job of protecting the
main speakers from the eects of low-frequencies that are better handled by the
subwoofer(s). ere are some uncommon situations where a 12 dB/octave lter
may perform better, which is why the CR-1 includes the shallower slope option.
10
Frequency (Hz)
100 1K
Voltage (dB)
-50
-40
-30
-20
-10
0
10
Subwoofer / Satellite Filter = 12dB
Subwoofer / Satellite Filter = 24db
100 Hz Crossover Frequency
SatelliteSubwoofer
Eects of “Crossover Slope” Switch (low-pass and high-pass lters are shown)

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Frequency Controls
e high-pass and low-pass lters in the CR-1 are designed with a Linkwitz-
Riley alignment. is is true for both the 12 dB/octave and 24 dB/octave slopes.
In keeping with standard Linkwitz-Riley lter practice, the indicated lter
cuto frequency (aka “corner frequency”) is the -6 dB point, not the -3 dB point.
Electrically, when the CR-1’s high-pass and low pass lters are set at the same
crossover frequency, their outputs will overlap in the crossover region, summing
to a perfectly at response.
Due to acoustic factors and speaker response deviations, this at electrical
summation may not actually translate to a at acoustic summation in your room,
which is why the CR-1 oers independent “Frequency” settings for the high-pass
and low-pass lter sections, as well as a pair of very useful “Damping” controls
(see page 11).
e rotary “Frequency” control knob in the Subwoofer Section of the front
control panel determines the low-pass crossover lter frequency (in Hertz) that is
applied to the subwoofer output signal. e rotary “Frequency” control knob in
the Satellite Section of the front control panel determines the high-pass crossover
lter frequency (in Hertz) applied to the satellite output signal.
CR-1’s ability to “split” the crossover frequencies of the subwoofer and
satellites allows for precision system setup within a given acoustic space and
subwoofer/satellite system.
Sub/Sat Balance Control
e “Sub/Sat Balance” control knob allows easy, intuitive gain
manipulation greatly simplifying level adjustment of your satellites
relative to your subwoofer(s). To increase the relative loudness of
the satellites, simply turn the “Sub/Sat Balance” control clockwise
towards the “+Sat” end of the control markings. To increase the relative
loudness of the subwoofer(s), turn the “Sub/Sat Balance” control knob
counterclockwise towards the “+Sub” end of the control markings.
e “Sub/Sat Balance” Control works over a total range dierence of +/-12 dB
(i.e., the Satellites’ output gain can be adjusted to be up to +12 dB higher than the
Subwoofers, or vice versa.) However, to maintain extreme circuit linearity in the
CR-1, when you turn the Level Match Control to +2 dB on the Satellite side (i.e.,
turn up the Satellite level by 2 dB), the circuit actually cuts the Subwoofer output
by 1 dB and raises the Satellite gain by only 1 dB, giving you the desired 2 dB
dierence. Operating in this fashion minimizes the gain envelope of the circuitry
and maximizes the sonic transparency of the CR-1.
We recommend that you set up your subwoofer’s gain and your main
loudspeaker amplier’s gain so that you achieve a good reference subwoofer level
with the “Sub/Sat Balance” control set at “0” (12 O’Clock). is way, you can
always easily return to your reference level setting.
Output Muting Buttons
e “Output Muting” buttons will “Mute” (turn o) the selected satellite or
subwoofer output when the button is pressed “in.” In the muted state, the button will
light up RED. During normal operation the “Output Muting” buttons are unlit.
Output muting can be helpful when troubleshooting or performing measurements
on your sound system. Selectively turning your individual speakers “on” or “o”
will help you isolate individual channels or speakers and determine which units are
functioning properly and which ones may be having problems.

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Damping Controls
ere are two “Damping” controls on the CR-1, one in the Subwoofer Section
and another in the Satellite Section of the front control panel. is precision
tuning feature allows you to compensate for loudspeaker response variations in
the crossover region. e “Damping” controls work by altering the damping of
the crossover lters. In technical terms, the controls raise or lower the “Q” factor
of each lter. However, the number markings on the “Damping” controls are for
reference only and do not directly refer to any specic “Q” value.
In plain language, the Subwoofer and Satellite “Damping” controls allow the
small frequency ranges around each lter’s initial roll-o region to be boosted
(+) or cut (–), outside of the standard Linkwitz-Riley lter alignments. When
set correctly, the “Damping” controls provide a nal “tweak” to an expertly
integrated subwoofer system. For best results, the “Damping” controls should
only be addressed aer the subwoofer(s) have been set correctly for polarity and
phase (refer to your subwoofer manuals for details).
If the crossover region sounds “thin,” turn the knobs to the right towards
the “+” numbers, creating a rise in response near the lter’s cuto frequency.
If the crossover region sounds “thick” or exaggerated, turn the knobs to the le
towards the “–” numbers, creating a soer corner around the lter’s cuto frequency.
See the diagram for a visual explanation of the “Damping” controls’ eects.
Frequency (Hz)
101 100 1K 10K
Voltage (dB)
-50
-40
-30
-20
-10
0
10
Subwoofer / Satellite Damping = +5
Subwoofer / Satellite Damping = Ø
Subwoofer / Satellite Damping = -5
SatelliteSubwoofer
100 Hz Crossover Frequency
Eects of “Damping” controls on frequency response (low-pass and high-pass lters are shown)

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Page 12
REAR PANEL CONTROLS AND CONNECTIONS IN DETAIL
Main Stereo Inputs
e “Main Stereo Inputs” receive the primary Le and Right outputs from
your 2-channel preamplier. is is the full-bandwidth stereo signal, which will
be split by the CR-1 to feed the satellite amplier and subwoofer(s).
If your preamplier only oers unbalanced RCA-type outputs, use RCA-
terminated, unbalanced cables connected to the CR-1’s “Unbalanced” jacks.
If your preamplier oers balanced output connections, use balanced XLR
or TRS terminated cables, connected to the CR-1’s “Balanced” XLR/TRS combo
jacks. If the “Unbalanced” RCA-type inputs of the CR-1 will remain unused,
insert the supplied RCA-type shorting plugs into these jacks, to eliminate the
possibility of noise entering open, unbalanced input connections.
Note that all four (XLR/TRS and RCA) “Main Stereo Inputs” are separately
buered and can be used independently. It is therefore possible to connect two
dierent preampliers to the CR-1’s “Main Stereo Inputs”, with one connected
to the balanced inputs and another to the unbalanced inputs. As long as only one
preamplier is powered and delivering signal at one time, the CR-1 will behave
normally, although it may require some adjustment of the “Sub/Sat Balance”
control to account for level dierences between preampliers.
If both connected preampliers are on and delivering signals to the CR-1
simultaneously, the CR-1 will not be damaged, but it will sum the balanced and
unbalanced input signals together, which may sound very strange.
Managed Bass Inputs
e CR-1’s “Managed Bass Inputs” are designed to receive the subwoofer
signal(s) sent by your home-theater receiver or processor, allowing you to share
your room’s subwoofers with a multi-channel home theater system.
If the HT receiver/processor only oers unbalanced outputs, use RCA-
terminated, unbalanced cables connected to the CR-1’s “Unbalanced” RCA-type
“Managed Bass Inputs”.
If your HT receiver/processor oers balanced output connections, use
balanced XLR or TRS terminated cables, connected to the XLR/TRS combo jacks
labeled “Balanced”. If the “Unbalanced” RCA-type “Managed Bass Inputs” will
remain unused, insert the supplied RCA-type shorting plugs into these jacks, to
eliminate the possibility of noise entering open, unbalanced input connections.
When the front panel “Crossover Function” switch is in “Bypass” mode
(switch “out” and red LED indicator lit), the “Managed Bass Inputs” are
connected directly to the “Outputs to Subwoofers” and no signal processing
occurs in the CR-1. e signal presented to the “Managed Bass Inputs” can be
either stereo (independent Le and Right channels) or mono (incoming signal is
already a summed (combined) signal for the subwoofer. See “Input Type” switch.
IMPORTANT: IF YOU FEED ONLY ONE MANAGED BASS INPUT IN THE
MONO INPUT MODE, THE SIGNALS ON THE INDIVIDUAL LEFT AND RIGHT
SUBWOOFER OUTPUTS WILL BE ONLY HALF THE VOLTAGE LEVEL OF THE
INPUT 6 DB. IF THIS LOSS OF OUTPUT LEVEL POSES A PROBLEM FOR
YOUR SYSTEM, USE A YADAPTOR TO SEND YOUR MONO INPUT SIGNAL
TO BOTH THE LEFT AND RIGHT MANAGED BASS INPUTS  THIS ALLOWS
YOU TO RECOVER THE 6 DB SIGNAL LOSS.
The Balanced Input Connections of
the CR-1 utilize Neutrik®Combo XLR/
TRS Connectors. These connectors
are designed to accept either type of
balanced input connector.

Page 13
|CR-1
“Input Type” Switch
Next to the “Managed Bass Inputs” on the rear panel of the CR-1 is the
“Input Type” switch, which determines whether the CR-1 maintains incoming
signals from your home theater receiver/preamp-processor in stereo (independent
Le and Right channels), or whether CR-1 sums independent signals to mono.
In “Stereo” mode, the Le Managed Bass Input corresponds directly to the Le
Subwoofer Output. e same is true for the Right channel. In “MONO” mode
only the “Le (or Mono)” channel is active.
Outputs to Satellite Amplier
e “Outputs to Satellite Amplier” are the primary stereo outputs to the
amplier that drives your Le and Right stereo speakers. ese outputs carry
the high-pass ltered signal (frequencies ABOVE the crossover frequency) to the
satellites. Choose the output type that matches the inputs on your main speaker
amplier. If the amplier oers both, balanced is the preferred method (XLR or TRS.)
e balanced XLR and TRS outputs share circuitry and both should NOT be
used at the same time (choose only one balanced output type). e XLR and RCA
outputs have separate buer amps and can be used at the same time, if desired.
Outputs to Subwoofers
ese are the primary outputs to one or more subwoofers, carrying the low-
passed signal (frequencies BELOW the crossover frequency) to the subwoofers.
As with the “Outputs to Satellite Amplier” (below) the XLR and TRS
balanced outputs share circuitry and should not be used at the same time.
However, the XLR and RCA outputs have separate buer amps and can all be
used at the same time to feed multiple subwoofers.
Ground Lift Switch
e Ground Li Switch “lis” (isolates) the Pin 1 (shield) ground of the XLR
and TRS connectors from chassis ground in the CR-1. is can be useful in
solving some noise problems, typically 60 Hz hum. If you do not have any hum
noise, leave this switch in the “Grounded” position. Note that if you change
any of your audio equipment upstream of the CR-1, you may need to revisit this
switch setting for best system noise performance. is switch will have no eect
on unbalanced (RCA) connections.
Fuse Holder
e Fuse Holder accepts the properly sized (250 V, 0.50 amp, slow-blow, 5x20
mm cartridge–type) AC fuse. Please call JL Audio Technical Support if your CR-1
will not power up.
IEC-Style AC Connector
e IEC-Style AC Connector accepts the standard IEC three-prong power
cord that is included with the CR-1. ONLY use a three-prong (grounded) power
cord with the CR-1. Use of a two-prong plug, or a “cheater plug” may result in
damage to the CR-1, which would not be covered under warranty.

|CR-1
Page 14
SCENARIO 1 CONNECTION DIAGRAM:
2-channel Subwoofer/Satellite System, Bass-Managed by the CR-1
e CR-1 connects between your 2-channel preamplier and your 2-channel
amplier as shown in the diagram on the opposing page. ese connections can
be made via balanced cables (XLR or TRS) or via unbalanced cables (RCA-type)
– OR – any combination of these, in pairs.
For example, you may connect your stereo preamplier’s main outputs to
the “Main Stereo Inputs” of the CR-1 via balanced XLR cables. en, you can
connect the CR-1’s “Outputs to Satellite Amplier” to a stereo amplier via
balanced TRS cables, and then connect the CR-1’s “Outputs to Subwoofer(s)”
to the subwoofers using unbalanced RCA cables. e CR-1 gives you unmatched
exibility to interconnect components with various input/output congurations.
Balanced connections generally provide superior noise rejection and ensure
proper grounding between components. If your 2-channel preamplier, amplier
and subwoofer(s) have balanced connections available, we highly recommend that
you use them.
Do not mix balanced and unbalanced connections for a given stereo signal
pair. e balanced and unbalanced connections have dierent gains and mixing
them within a stereo pair will result in a level imbalance between channels.
If you are using only one subwoofer, set the CR-1’s front-panel “Subwoofer
Output Mode” switch to “L+R” (mono). If you are using more than one
subwoofer, you may choose “L+R” (mono) or “Stereo” subwoofer modes
depending on your room setup and personal preference.
IMPORTANT: WHEN THE CR1 IS “OFF”, SIGNAL WILL BE PASSED DIRECTLY
FROM THE “MAIN STEREO INPUTS” TO THE “OUTPUTS TO SATELLITE
AMPLIFIER” WITHOUT FILTERING. THIS ALLOWS YOU TO LISTEN TO YOUR
2CHANNEL SYSTEM IN FULLRANGE MODE, WITH NO SUBWOOFERS, BY
SWITCHING THE CR1 TO “OFF”
IMPORTANT
When the CR-1 is connected as shown in
this scenario, the operating modes and
behaviors are as follows:
Power: On and “Crossover Function”
switch: “On”
“Outputs to Subwoofers” are low-pass
ltered by the CR-1
“Outputs to Satellites” are high-pass
ltered by the CR-1
Power: On and Crossover Function
switch: “Bypass”
“Outputs to Subwoofers” are o.
“Outputs to Satellites” pass signals
directly from “Main Stereo Inputs”,
unltered (full-range).
Power: O
“Outputs to Subwoofers” are o
“Outputs to Satellites” pass signals
directly from “Main Stereo Inputs”,
unltered (full-range).

Page 15
|CR-1
WARNING! TURN OFF THE CR-1 AND ALL OTHER EQUIPMENT IN THE
SYSTEM BEFORE MAKING OR CHANGING ANY CONNECTIONS! WARNING
ACTIVE SUBWOOFER CROSSOVER
C R -1 Built in USA with domestic and imported components
OUTPUTS TO SATELLITE AMPLIFIER MANAGED BASS INPUTS
L R L RRIGHTLEFT
(OR MONO)
RIGHTLEFT
OUTPUTS TO SUBWOOFER(S)
OUTPUTS TO
SUBWOOFER(S)
MANAGED BASS INPUTS
OUTPUTS TO
SATELLITE
AMPLIFIER
MAIN
STEREO INPUTS
MAIN STEREO INPUTS
only feed subwoofer(s)
when crossover is bypassed.
FUSE
Replace fuse with proper
type and value only.
Refer to manual.
Warranty void if serial number is removed, altered or defaced.
CR-1 SERIAL NUMBER:
Grounded
Isolated
CR-1
This device complies with part 15 of the FCC rules. Operation is
subject to the following two conditions: (1) this device may not cause
harmful interference, and (2) this device must accept any interference
received, including interference that may cause undesired operation.
BALANCED BALANCED BALANCED BALANCED
BALANCED BALANCED BALANCED BALANCED
Stereo
CAN ICES-3(B)/NMB-3(B)
SOURCE INPUTS
MAIN OUTPUTS
SOURCE A SOURCE B SOURCE C SOURCE D SOURCE E TAPE OUT
RIGHT
LEFT
LEFT
STEREO
INPUTS OUTPUTS TO LOUDSPEAKERS
BALANCED BALANCED
LEFT
BALANCED
RIGHT
BALANCED
LEFT POWERED
SUBWOOFER
RIGHT POWERED
SUBWOOFER
LEFT LOUDSPEAKER RIGHT LOUDSPEAKER
Stereo Preamplier
C R -1
Stereo Amplier
Balanced Connection
Unbalanced Connection
OR
Unbalanced
Balanced
RIGHT
OR
Unbalanced
Balanced
OR
Unbalanced
Balanced

|CR-1
Page 16
SCENARIO 2 CONNECTION DIAGRAM:
2-channel Subwoofer/Satellite System that is Bass-Managed by the CR-1 and also
shares active subwoofers with a separate multi-channel home theater system
is scenario shows how you can share your room’s subwoofer(s) between
a completely separate home theater (HT) and a stereo, 2-channel system. In
this scenario, your HT receiver (or amplier) will power dedicated Le, Center,
Right, and surround speakers. A separate, dedicated stereo amplier will power
separate, dedicated stereo Le and Right speakers (not shared with the HT setup.)
e subwoofer(s) will be shared between both systems, using the CR-1 as a switch
to select the operating mode.
Most HT receivers and preamp/processors provide a single (mono) subwoofer
output; however, a few high-end receivers and processors may oer dual subwoofer
outputs. For this reason, CR-1 has le and right “Managed Bass Inputs”.
e 2-channel amplier and preamplier connect to the CR-1 exactly as
shown in the diagram at le and as described in Scenario #1, on page 14.
Next, connect the HT receiver’s or HT preamp/processor’s subwoofer outputs
to the “Managed Bass Inputs” on the CR-1. You may use XLR (balanced) or
RCA (unbalanced) cables to make these connections. en, set the “Input Type”
switch located next to the “Managed Bass Inputs” to the “Stereo” or “Mono”
position, depending on the output from your HT receiver or HT preamp/
processor (this switch will usually be set to “MONO”.)
If you connect only one subwoofer signal to the “Managed Bass Input”, be
sure to use the corresponding Le or Right “Output to Subwoofer” on the CR-1.
Using the opposite one will result in no subwoofer signal.
If you are using one subwoofer, set the CR-1’s front-panel “Subwoofer Output
Mode” switch to “L+R” (mono.) If you are using more than one subwoofer, you
may decide whether to choose “L+R” (mono) or “Stereo” subwoofer modes
depending on your room setup and personal preference.
IMPORTANT: WHEN THE CR1 IS OPERATING IN “BYPASS” MODE, THE
“SUBWOOFER OUTPUT MODE” SWITCH ON THE FRONT PANEL WILL HAVE
NO EFFECT AND THE MANAGED BASS SUBWOOFER SIGNAL FROM YOUR
HT RECEIVER OR PREAMP/PROCESSOR WILL BE PASSED THROUGH THE
CR1 WITH NO ALTERATION.
IMPORTANT
When the CR-1 is connected as shown in
this scenario, the operating modes and
behaviors are as follows:
Power: On and “Crossover Function”
switch: “On”
“Outputs to Subwoofers” are low-pass
ltered by the CR-1
“Outputs to Satellites” are high-pass
ltered by the CR-1
Power: On and Crossover Function
switch: “Bypass”
“Outputs to Subwoofers” pass signals
directly from the “Managed Bass Inputs”
“Outputs to Satellites” pass signals
directly from “Main Stereo Inputs”,
unltered (full-range).
Power: O
“Outputs to Subwoofers” are o
“Outputs to Satellites” pass signals
directly from “Main Stereo Inputs”,
unltered (full-range).

Page 17
|CR-1
ACTIVE SUBWOOFER CROSSOVER Built in USA with domestic and imported components
OUTPUTS TO SATELLITE AMPLIFIER MANAGED BASS INPUTS
L R L RRIGHTLEFT
(OR MONO)
RIGHTLEFT
OUTPUTS TO SUBWOOFER(S)
OUTPUTS TO
SUBWOOFER(S)
MANAGED BASS INPUTS
OUTPUTS TO
SATELLITE
AMPLIFIER
MAIN
STEREO INPUTS
MAIN STEREO INPUTS
only feed subwoofer(s)
when crossover is bypassed.
FUSE
Replace fuse with proper
type and value only.
Refer to manual.
Warranty void if serial number is removed, altered or defaced.
CR-1 SERIAL NUMBER:
Grounded
Isolated
CR-1
This device complies with part 15 of the FCC rules. Operation is
subject to the following two conditions: (1) this device may not cause
harmful interference, and (2) this device must accept any interference
received, including interference that may cause undesired operation.
BALANCED BALANCED BALANCED BALANCED
BALANCED BALANCED BALANCED BALANCED
Stereo
CAN ICES-3(B)/NMB -3(B)
SOURCE INPUTS
MAIN OUTPUTS
SOURCE A SOURCE B SOURCE C SOURCE D SOURCE E TAPE O UT
C R -1C R -1
Stereo Preamplier
LEFT
BALANCED
RIGHT
BALANCED
SUBWOOFER/LFE OUTPUT
MAIN OUTPUTS
HT Receiver
LEFT POWERED
SUBWOOFER
RIGHT POWERED
SUBWOOFER
DEDICATED HT LOUDSPEAKERS
OUTPUTS TO LOUDSPEAKERS
DEDICATED 2-CH LOUDSPEAKERS
CENTER
FRONT
LEFT
FRONT
RIGHT
LEFT
SURROUND
RIGHT
SURROUND
PREAMP OUTPUTS
SUB/LFE
C R -1
OR
Unbalanced
Balanced
OR
Unbalanced
Balanced
RIGHT
RIGHT
LEFT
LEFT
STEREO
INPUTS OUTPUTS TO LOUDSPEAKERS
BALANCED BALANCED
Stereo Amplier
LEFT LOUDSPEAKER RIGHT LOUDSPEAKER
OR
Unbalanced
Stereo or Mono
Balanced
Balanced Connection
Unbalanced Connection
WARNING! TURN OFF THE CR-1 AND ALL OTHER EQUIPMENT IN THE
SYSTEM BEFORE MAKING OR CHANGING ANY CONNECTIONS! WARNING

|CR-1
Page 18
SCENARIO 3 CONNECTION DIAGRAM:
2-channel Subwoofer/Satellite System that is Bass-Managed by the CR-1 and also
shares active subwoofers AND MAIN L-R SATELLITE SPEAKERS with a separate
multi-channel home theater system
is scenario applies to hybrid home theater / 2-channel setups which will share
subwoofers and ALSO share the main le/right loudspeakers. In this setup, your
home theater receiver (or amplier) will power your Center and Surround speakers
and pass preamp-level, Le and Right signals to the CR-1. A dedicated, separate
stereo amplier powers the Le and Right speakers for both the multi-channel and
the 2-channel system. e subwoofer(s) will also be shared between both systems.
is scenario requires that you connect two dierent components to the “Main
Stereo Inputs” of the CR-1. is takes advantage of the CR-1’s independently
buered, balanced and unbalanced input architecture.
e components that will connect to the “Main Stereo Inputs” will be your
home theater receiver or preamp/processor, and your 2-channel preamplier.
Please note: Your home theater receiver must have preamp-level (line-level)
outputs for its main le and right channels. ese will typically be unbalanced,
RCA-type outputs. CR-1 is not designed to receive speaker-level signals at its “Main
Stereo Inputs” and attempting to do so will result in very severe distortion and
possible system damage.
If one of your components has balanced outputs (XLR or TRS connectors),
connect this component’s Le and Right outputs to the balanced “Main Stereo
Inputs” of the CR-1 with the appropriate cables. en, connect the second
component to the unbalanced (RCA-type) “Main Stereo Inputs” of the CR-1.
If neither of your components oers balanced outputs, you will need to obtain
a pair of adaptors to plug in to the balanced input connections of the CR-1. ese
can be “RCA to XLR” or “RCA to 1/4-inch TRS” adaptors. Either will allow you
to connect to the balanced inputs using an RCA-type interconnect cable. is
connection will no longer be balanced.
In this connection scenario, it is intended that you use only one front-end
component at a time: i.e. either your HT receiver –OR- your stereo preamp, not both
at once. If you accidentally turn both on, the CR-1 will not be damaged, but it may
sound very strange to hear both sources playing at once.
Most home theater receivers and preamp/processors provide a single (mono)
subwoofer output; however, a few high-end receivers and processors give you dual
subwoofer outputs. Connect the receiver’s subwoofer outputs to the Le and/or
Right “Managed Bass Inputs” on the CR-1. en, set the “Managed Bass Input”
section’s “Input Type” switch to the “Stereo” or “MONO” position, depending on
the output from your receiver (this switch will usually be set to “MONO”.)
If you connect only one subwoofer signal to a “Managed Bass Input” on the
CR-1, be sure to use the corresponding Le or Right “Output to Subwoofer” on the
CR-1. If you are using one subwoofer, set the CR-1’s front-panel “Subwoofer Output
Mode” switch to “L+R” (mono.) If you are using more than one subwoofer, you may
decide whether to choose “L+R” (mono) or “Stereo” subwoofer modes depending
on your room setup and personal preference.
When the CR-1 is connected as shown in
this scenario, the operating modes and
behaviors are as follows:
Power: On and “Crossover Function”
switch: “On”
“Outputs to Subwoofers” are low-pass
ltered by the CR-1
“Outputs to Satellites” are high-pass
ltered by the CR-1
Power: On and Crossover Function
switch: “Bypass”
“Outputs to Subwoofers” pass signals
directly from the “Managed Bass Inputs”
“Outputs to Satellites” pass signals
directly from “Main Stereo Inputs”,
unltered (full-range).
Power: O
“Outputs to Subwoofers” are o
“Outputs to Satellites” pass signals
directly from “Main Stereo Inputs”,
unltered (full-range).
IMPORTANT: WHEN THE CR1 IS OPERATING IN “BYPASS” MODE, THE
“SUBWOOFER OUTPUT MODE” SWITCH ON THE FRONT PANEL WILL HAVE
NO EFFECT AND THE MANAGED BASS SUBWOOFER SIGNAL FROM YOUR
HT RECEIVER OR PREAMP/PROCESSOR WILL BE PASSED THROUGH THE
CR1 WITH NO ALTERATION.
IMPORTANT

Page 19
|CR-1
ACTIVE SUBWOOFER CROSSOVER
C R -1 Built in USA with domestic and imported components
OUTPUTS TO SATELLITE AMPLIFIER MANAGED BASS INPUTS
L R L RRIGHTLEFT
(OR MONO)
RIGHTLEFT
OUTPUTS TO SUBWOOFER(S)
OUTPUTS TO
SUBWOOFER(S)
MANAGED BASS INPUTS
OUTPUTS TO
SATELLITE
AMPLIFIER
MAIN
STEREO INPUTS
MAIN STEREO INPUTS
only feed subwoofer(s)
when crossover is bypassed.
FUSE
Replace fuse with proper
type and value only.
Refer to manual.
Warranty void if serial number is removed, altered or defaced.
CR-1 SERIAL NUMBER:
Grounded
Isolated
CR-1
This device complies with part 15 of the FCC rules. Operation is
subject to the following two conditions: (1) this device may not cause
harmful interference, and (2) this device must accept any interference
received, including interference that may cause undesired operation.
BALANCED BALANCED BALANCED BALANCED
BALANCED BALANCED BALANCED BALANCED
Stereo
CAN ICES-3(B)/NMB-3(B)
SOURCE INPUTS
MAIN OUTPUTS
SOURCE A SOURCE B SOURCE C SOURCE D SOURCE E TAPE O UT
RIGHT
RIGHT
LEFT
LEFT
STEREO
INPUTS OUTPUTS TO LOUDSPEAKERS
BALANCED BALANCED
LEFT
BALANCED
RIGHT
BALANCED
PREAMP OUTPUTS
FRONT
SURROUND CENTER
SUB/LFE
SUBWOOFER/LFE OUTPUT
*
MAIN OUTPUTS
LEFT LOUDSPEAKER RIGHT LOUDSPEAKER
DEDICATED HT LOUDSPEAKERS
OUTPUTS TO LOUDSPEAKERS
LEFT & RIGHT LOUDSPEAKERS IN
2-CHANNEL MODE
(”Crossover Function” switch in “On” Position)
FRONT LEFT & RIGHT SPEAKERS IN
HOME THEATER MODE
(”Crossover Function” switch in “Bypass” Position)
CENTER
LEFT
SURROUND
RIGHT
SURROUND
Stereo Preamplier
HT Receiver
C R -1
Stereo Amplier
OR Unbalanced
Balanced
LEFT POWERED
SUBWOOFER
RIGHT POWERED
SUBWOOFER
OR Unbalanced
Balanced
Balanced Connection
Unbalanced Connection
Stereo or Mono
WARNING! TURN OFF THE CR-1 AND ALL OTHER EQUIPMENT IN THE
SYSTEM BEFORE MAKING OR CHANGING ANY CONNECTIONS! WARNING

|CR-1
Page 20
SCENARIO 1 SETUP GUIDE:
2-channel Subwoofer/Satellite System, Bass-Managed by the CR-1
Connect your CR-1 as shown in Scenario 1 Connection Diagram on page 15.
For many 2-channel audiophiles, it is intuitive to select a very low crossover
frequency, especially if the satellite (main) speakers are large and capable of
good low frequency extension on their own. Aer all, we have all been taught
that subwoofers should be integrated in a manner that they “disappear”
acoustically, and that low crossover frequencies are a good way to reach this goal.
Unfortunately, this advice is usually WRONG.
In light of the above, we will share some very important advice, borne
from extensive experience setting up subwoofer/satellite systems in the most
demanding applications. An unnecessarily low crossover point (40 Hz, for
example) wastes the potential benet of your subwoofer in most subwoofer/
satellite systems. e goal is to unburden your satellites as much as possible,
and to pass that low-frequency burden to your subwoofer. Done correctly, the
resulting system is more dynamic, more “open” at all frequencies, and will
exhibit a wider bandwidth at all listening levels. If you select a very low crossover
frequency, you will leave a lot of those performance gains behind.
To get maximum benet from the integration of a subwoofer (or subwoofers)
into your 2-channel audio system, we recommend crossover frequencies
between 60 Hz and 120 Hz, with 80 Hz being an excellent starting point
(and oen, a very good ending point). e CR-1 allows you to select crossover
frequencies outside this recommended range in the event of highly unusual
system setup requirements.
If you are worried that a higher crossover frequency will lead to easily
localizable bass or “disconnected bass”, stop worrying. e CR-1’s powerful
features allow for superior integration at any crossover frequency. It is this
precise integration that will truly make your subwoofer/satellite seamless and
your subwoofers truly “disappear” into the sound stage. e ultimate reward is a
remarkably open sound stage, with better imaging and much cleaner dynamics.
Really amazing low-frequency qualities will also be evident, with complete unity
between subwoofer and satellite outputs.
To begin setup, set the CR-1’s front panel controls as follows:
Power: “On”
Crossover Function: “On” (switch pushed “in” with NO red light)
Subwoofer Output Mode: “L+R” (mono sub output)
Subwoofer Frequency: 80 Hz (ideal for many systems)
Subwoofer Damping: “0”
Sub/Sat Balance: “0”
Satellite Damping: “0”
Satellite Frequency: 80 Hz (ideal for many systems)
Crossover Slope: 24 dB/Octave (preferred for most systems)
All Muting switches set to “Operate” (all switches “out” with NO red lights.)