C)Fade HF Front to Rear with Non-Fading Subwoofer Level

Required: a source unit or processor with front and rear pairs of stereo outputs.

Input Connections: one stereo pair of source unit outputs-is connected to the CH 1&2

JOQVUTPGUIFW TFMFDUi4chwPOUIF

iInput ModewTXJUDIJOUIFiCH 1&2 Input Sectionw 5IFTFDPOETUFSFPQBJSPGTPVSDF unit outputs is connected to the CH 3&4 inputs of the 450/4v2. Connect the subwoofer amplifier inputs to the preamp outputs of the

W 4FMFDUiALLwPOUIFiSignal Fromw TXJUDIJOUIFiPreamp Output Sectionw 

Result: with this option, the user has the ability to fade the HF signals from front-to-rear without fading the signal to the subwoofer amplifier.

D)Subwoofer Level Control Only

Required: a source unit or processor with left, right and dedicated subwoofer outputs.

Input Connections: The main stereo pair of source unit outputs is connected to the CH

JOQVUTPGUIFW TFMFDUi2chwPO UIFiInput ModewTXJUDIJOUIFiCH 1&2 Input Sectionw 5IFTPVSDFVOJUTEFEJDBUFE

subwoofer output is connected to the subwoofer amplifier inputs. In this mode, the 450/4v2’s preamp output is not used.

Result: with this option, the user has the ability to control the absolute level of the subwoofer channel relative to the HF channels, but cannot fade the front and rear HF channels relative to each other.

! I M P O RTA N T

Set the CH 1&2 “Input Sens.” with the source unit’s subwoofer level control set at 3/4 of full output. See Appendix B (page 20) for details.

E)Front to Rear HF Fading and 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 stereo pair (front, typically) of source unit outputs is connected to the CH 1&2 inputs of the 450/4v2. The second stereo pair of source unit outputs (rear, typically) is connected to the CH

JOQVUTPGUIFW TFMFDUi4chwPO UIFiInput ModewTXJUDIJOUIFiCH 1&2 Input Sectionw 5IFTPVSDFVOJUTEFEJDBUFE subwoofer output is connected to the subwoofer amplifier inputs. In this mode, the 450/4v2’s preamp output is not used.

Result: with this option, the user has the ability to fade the front and rear HF channels relative to each other and also has the ability to control the absolute level of the subwoofer channel relative to the HF channels.

! I M P O RTA N T

Set the CH 1&2 “Input Sens.” with the source unit’s subwoofer level control set at 3/4 of full output. See Appendix B (page 20) for details.

Crossover Setup for Bi-Amplified System with one 450/4v2 and a separate subwoofer amplifier:

Once the input and preamp output sections have been configured appropriately, go to the

iCH 1&2 Filter Sectionw4FMFDUix1wPOUIF

iFreq. RangewTXJUDIiHPw IJHIQBTT POUIF i'JMUFS5ZQFwTXJUDIBOEi12dBwPSi24dBwPOUIF i'JMUFSMode/SlopFwTXJUDIBOEBOBQQSPQSJBUF iFilter Freq.w )[JTBHPPETUBSUJOHQPJOU 

5IFiInfrasonic FilterwBOEiBass EQwGFBUVSFT

cannot be used in this mode.

/FYUUVSOZPVSBUUFOUJPOUPUIFiCH 3&4

Input SectionwBOETFMFDUix1wPOUIFiFreq.

RangewTXJUDIiHPw IJHIQBTT POUIFiFilter

TypewTXJUDIBOEi12dBwPSi24dBwPOUIFiFilter

Mode/SlopewTXJUDIBOEBOBQQSPQSJBUFiFilter

Freq.w BHBJO)[JTBHPPETUBSUJOHQPJOU 

After proper adjustment of the 450/4v2’s CH 1&2 and CH 3&4, and the subwoofer amplifier’s

iInput RangewBOEiInput Sens.wZPVDBOGJOF

tune filter frequencies and slopes and attenuate either pair of channels to achieve proper balance.

'PSQSPQFSBEKVTUNFOUPGUIFiInput Sens.w

controls of the 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.

Bi-Amplified 3.1 System with one 450/4v2 in three-channel mode and a separate subwoofer amplifier

This configuration requires a separate subwoofer amplifier with a built-in low- pass filter. All JL Audio subwoofer amplifiers have this feature.

The separate amplifier will drive the subwoofer system with low-pass filtering (select a filter

GSFRVFODZPG)[UPTUBSU 5IFJOQVUTPG

the subwoofer amplifier will be connected to the preamp outputs of the 450/4v2 or to the source unit or multi-channel processor directly.

In this configuration, CH 1&2 of the 450/4v2 will drive front-left and front-right component speakers (stereo 150W x 2) with high-pass filtering. CH 3&4 will be bridged mono to drive a center-front component speaker system (150W x

1)with high-pass filtering. All three channels will have equal power at 3 – 4Ω.

Input connection options for bi-amplified 3.1 system with one 450/4v2 and a separate subwoofer amplifier:

A)Real Left-Center-Right Channels and Subwoofer with Multi-Channel Source Required: a multi-channel processor or source

VOJU %PMCZ%JHJUBM¥%PMCZ1SP-PHJD**¥EUT¥etc.) with center channel output.

Input Connections: the left-front and right-front source unit outputs are connected to the CH 1&2 inputs of the 450/4v2 and the front-center channel output of the source unit or processor is connected to the CH 3&4 inputs of the

W TFMFDUi4chwPOUIFiInput Modew TXJUDIJOUIFiCH 1&2 Input Sectionw 6TFB i:BEBQUPSwMJLFUIF+-"VEJP&$4NPEFM9#

CLRAICY-1F2M (sold separately) to feed both RCA jacks on the amplifier from the single signal cable. Most multi-channel processors and source units are also equipped with a dedicated subwoofer output and subwoofer level control. Connect this subwoofer output directly to the subwoofer amplifier’s inputs. The 450/4v2’s preamp outputs are not used.

Result: True left, center and right channels with multi-channel material, derived center channel with stereo material. Rear-surround channels are unused. User adjustability of left, center and right channels depends on source unit/ processor. Subwoofer level is user adjustable.

! 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.

16 JL Audio - 450/4v2 Owner’s Manual

17

Page 8 Page 10
Page 9
Image 9
JL Audio 450/4V2 Fade HF Front to Rear with Non-Fading Subwoofer Level, ICH 1&2 Filter Sectionw4FMFDUix1wPOUIF
Page 8 Page 10
Top Page Image Contents