!
I M P O RTA N T
The “Summed Center Channel” methods outlined below do not create a true center channel, they simply sum left and right signals to the center speaker system. This is not as desirable as a true center channel from a multi- channel source, but it can be used to create a convincing sound stage in some applications.
B)“Summed Center Channel”, No User Adjustability
Required: a basic source unit or processor with left and right stereo outputs.
Input Connections: a single pair of stereo source unit outputs, connected to the CH 1&2
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iInput ModewTXJUDIJOUIFiCH 1&2 Input Sectionw $POOFDUUIFTVCXPPGFSBNQMJGJFS inputs to the preamp outputs of the 450/4v2
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Result: the relative level of all channels will be
GJYFECZUIFWTiInput Sens.wTFUUJOHT and will not be user adjustable from the front of the vehicle.
C)Fade Between “Summed Center Channel” Level and Left/Right Level with
Required: a source unit or processor with front and rear pairs of stereo outputs.
Input Connections: one pair of stereo source unit outputs is connected to the CH 1&2
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iInput ModewTXJUDIJOUIFiCH 1&2 Input Sectionw "TFDPOEQBJSPGTPVSDFVOJU outputs is connected to the CH 3&4 inputs. Connect the subwoofer amplifier inputs to the
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Result: with this option, the user has the ability
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Right channel pair via the source unit’s fader control. Subwoofer is
D)Fade Between “Summed Center Channel” Level and Left/Right Level with Separate Subwoofer Level Control
Required: a source unit or processor with front and rear pairs of stereo outputs plus a dedicated subwoofer output.
Input Connections: one pair of stereo source unit outputs is connected to the CH 1&2
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iInput ModewTXJUDIJOUIFiCH 1&2 Input Sectionw "TFDPOEQBJSPGTPVSDFVOJU outputs is connected to the CH 3&4 inputs. The source unit’s dedicated subwoofer output is connected to the subwoofer amplifier’s inputs. In this mode, the 450/4v2’s preamp output is not used.
Result: with this option, the user has the ability to
GBEFCFUXFFOUIFi4VNNFE$FOUFS$IBOOFMw level and the Left and Right channel levels via the source unit’s fader control and also has the ability to control the absolute level of the subwoofer channel relative to the three HF channels with the source unit’s subwoofer level control.
!
I M P O RTA N T
Set the subwoofer amplifier’s “Input Sens.” with the source unit’s subwoofer level control set at 3/4 of full output. Refer to the subwoofer amplifier owner’s manual for proper adjustment.
Crossover setup for
Once the input and preamp output sections have
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1&2 Filter Sectionw4FMFDUix1wPOUIFiFreq.
RangewTXJUDIiHPw IJHIQBTT POUIFiFilter
TypewTXJUDIBOEi12dBwPSi24dBwPOUIF
iFilter Mode/SlopewTXJUDIBOEBOBQQSPQSJBUF
iFilter Freq.w )[JTBHPPETUBSUJOHQPJOU
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cannot be used in this mode.
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Input SectionwBOETFMFDUix1wPOUIFiFreq.
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TypewTXJUDIBOEi12dBwPSi24dBwPOUIFiFilter
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Freq.w BHBJO)[JTBHPPETUBSUJOHQPJOU
After proper adjustment of the 450/4v2’s CH 1&2 and CH 3&4, and the subwoofer
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you can fine tune filter frequencies and slopes and attenuate the center channel or the left
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controls to achieve proper balance. For proper
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450/4v2 use the method shown in Appendix B (page 22). For precise filter frequency information for the 450/4v2 refer to Appendix A (page 22). Refer to the subwoofer amplifier owner’s manual for proper adjustments.
(JL Audio 500/1v2 or 1000/1v2 recommended)
This configuration is identical to the 3.1 system configuration with Input Option A, except for the addition of a JL Audio 300/2v2
The 300/2v2 in
To add this capability, connect the 300/2v2’s inputs to the rear (surround) outputs of a multi- channel processor or source unit and set the
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18 JL Audio - 450/4v2 Owner’s Manual | 19 |
