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Owner’s Manual

Active Subwoofer Crossover

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Summary of Contents for CR-1

Page 1: ...Owner s Manual Active Subwoofer Crossover ...

Page 2: ...ord 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 The device should be cleaned only as recommended in the operating instructions 11 Nonuse Periods The power cord of the device should b...

Page 3: ...e 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 The user should not attempt to service the device beyond what is described in the operating instructions All other servicing should be referred ...

Page 4: ... 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 Sc...

Page 5: ...ratio matching are employed to adjust the analog circuit s filter frequencies This digitally controlled analog filter circuitry allows for high precision in making frequency adjustments and facilitates precise matching between the left and right channels for the ultimate in crossover fidelity and transparency The CR 1 offers 167 individual cutoff frequency choices between the 30 Hz and 150 Hz limi...

Page 6: ... a power amplifier or receiver as the heat generated by those components could affect the CR 1 Whenever possible place the CR 1 on its own shelf or surface Rack Mount The 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 U...

Page 7: ...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 Swi...

Page 8: ...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 filtered signals via its Outputs to Subwoofer s and high pass filtered signals via its Outputs to Satellites This is the correct mode for 2 channel listening and indicates that the CR 1 s active crossover filters are in line and functionin...

Page 9: ...signals below its corner frequency at a rate of 24 dB for every halving of frequency A 24 dB per octave low pass filter attenuates signals above its corner frequency at a rate of 24 dB for every doubling of frequency The 2nd order filter setting attenuates at only 12 dB per octave above or below each filter s corner frequency With a steeper roll off slope there is less overlap of acoustical output...

Page 10: ...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 The Sub Sat Balance Control works over a total range differenc...

Page 11: ...er alignments When set correctly the Damping controls provide a final tweak to an expertly integrated subwoofer system For best results the Damping controls should only be addressed after 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 re...

Page 12: ...Bass Inputs The 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 offers unbalanced outputs use RCA terminated unbalanced cables connected to the CR 1 s Unbalanced RCA type Managed Bass Inputs If your HT rece...

Page 13: ...re 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 Amplifier 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 buffer amps and can all be used at the same time to feed multiple subwoofers...

Page 14: ... unbalanced connections for a given stereo signal pair The balanced and unbalanced connections have different 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 de...

Page 15: ...L 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 S...

Page 16: ...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 Left 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 t...

Page 17: ...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 CR 1 CR 1 Stereo Preamplifier LEFT BALANCED RIGHT BALANCED SUBWOOFER LFE OUTPUT MAIN OUTPUTS HT Receiver LEFT POWERED SUBWOOFER RIGHT POWERED SUBWOOFER ...

Page 18: ...nnect to the balanced inputs using an RCA type interconnect cable This 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 ...

Page 19: ...ed 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 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 RIG...

Page 20: ...erformance gains behind To get maximum benefit 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 often a very good ending point The CR 1 allows you to select crossover frequencies outside this recommended range in the event of highly unusual system setup req...

Page 21: ...ynamic at a variety of volume levels Other adjustments on the CR 1 and your powered subwoofer s make it possible to dial in your system s transition from the satellites to the subwoofer in the crossover region and to get the subwoofers dialed in for your room s acoustics A good high resolution real time analyzer is very helpful to adjust these controls but they can also be adjusted by ear A Crosso...

Page 22: ...ill need to RAISE the subwoofer level in your home theater receiver or processor to compensate for that level shift The goal is to find a common setting of the Subwoofer s Master Level control that works well for both systems the home theater receiver or processor s level control is used to offset any level differences that exist The CR 1 s Sub Sat Balance control is intended for fine tuning rathe...

Page 23: ...ater receiver or processor to compensate for that level shift The goal is to find a common setting of the Subwoofer s Master Level control that works well for both systems the home theater receiver or processor s level control is used to offset any level differences that exist The CR 1 s Sub Sat Balance control is intended for fine tuning rather than gross level offsets First you will set up the t...

Page 24: ...usted and wiped with a dry non abrasive microfiber cloth Do not use water to clean the CR 1 nor any harsh chemicals TROUBLESHOOTING CR 1 is plugged into a power outlet but will not turn on no lights at all What should I do 1 Try plugging the CR 1 s power cord into a known good AC power outlet 2 If the above does not help remove the Fuse cover on the rear of the CR 1 and see if the fuse is blown If...

Page 25: ...low limitations on implied warranties therefore these exclusions may not apply to you This warranty gives you specific legal rights and you may also have other rights which vary from state to state If you need service on your JL AUDIO product All warranty returns should be sent to JL AUDIO freight prepaid through an authorized JL AUDIO dealer and must be accompanied by proof of purchase a copy of ...

Page 26: ... CR 1 Page 26 INSTALLATION NOTES Use this diagram to document your CR 1 s inputs outputs and switch control positions ...

Page 27: ...Page 27 CR 1 ...

Page 28: ...l to Noise Ratio 115 dB referred to rated output voltage Channel Separation 80 dB at 1 kHz typical Low Pass Frequency Response 0 1 dB from 5 Hz to 1 4 of filter frequency High Pass Frequency Response 0 1 dB from 4x filter frequency to 80 kHz Power Consumption 30 Watts typical with or without signal Mains Voltage Frequency 120V 60 Hz or 230 240V 50 Hz or 60 Hz factory set for destination country se...

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