SYSTEM CONFIGURATIONS
The 450/4v2 is a very flexible amplifier, well- suited for a multitude of system configurations. In this section, the most likely configurations are explained in detail.
Once you have selected your desired configuration, you can use the amplifier panel drawings on the bottom of the following pages to mark the required switch positions for easy reference.
BI-AMPLIFIED SYSTEMS
The most common application of bi- amplification in mobile audio is to drive a subwoofer system from one or more amplifiers or channels and component speakers from separate amplifiers or channels.
The 450/4v2 can be configured to drive a
Bi-Amplified System with one 450/4v2
In this configuration, CH 1&2 of the 450/4v2 will drive subwoofers (stereo 150W x 2 or bridged 300W x 1) with
Input connection options for a
A)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 inputs of
UIFW TFMFDUi2chwPOUIFiInput Modew
TXJUDIJOUIFiCH 1&2 Input Sectionw
Result: the relative level of the LF and HF
DIBOOFMTXJMMCFGJYFECZUIFWTiInput Sens.wTFUUJOHTBOEXJMMOPUCFVTFSBEKVTUBCMF
from the front of the vehicle.
B)Fade Subwoofer Level vs. HF Level Required: a source unit or processor with front
and rear pairs of outputs.
Input Connections: the first stereo pair of source unit outputs is connected to the CH 1&2 inputs of the 450/4v2. The second stereo pair of source unit outputs is connected to the CH
JOQVUT TFMFDUi4chwPOUIFiInput Modew TXJUDIJOUIFiCH 1&2 Input Sectionw
Result: in this mode, the user has the ability to fade or control the level of the LF channels relative to the HF channels via the source unit’s fader control without exceeding the maximum clean output level set by each
BNQMJGJFSTFDUJPOTiInput Sens.wDPOUSPMT
C)Subwoofer Level Control Only
Required: a source unit or processor with left, right and subwoofer outputs.
Input Connections: the main stereo pair of source unit outputs is connected to the CH 3&4 inputs of the 450/4v2. The source unit’s dedicated subwoofer output is connected to the CH
JOQVUT TFMFDUi4chwPOUIFiInput Modew
TXJUDIJOUIFiCH 1&2 Input Sectionw
Result: in this mode, the user has the ability to control the absolute level of the LF channels 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 22) for details.
Crossover Setup for
Once the input sections have been
DPOGJHVSFEBQQSPQSJBUFMZHPUPUIFiCH 1&2 Filter Sectionw4FMFDUix1wPOUIFiFreq. RangewTXJUDIiLPw MPXQBTT POUIFiFilter TypewTXJUDIBOEi12dBwPSi24dBwPOUIF iFilter Mode/SlopewTXJUDIBOEBOBQQSPQSJBUF iFilter Freqw )[JTBHPPETUBSUJOH
point). You may also choose to activate the
iInfrasonic FilterwBOEPSiBass EQwGFBUVSFT
JOUIFiCH 1&2 Bass ControlwTFDUJPO1MFBTF
LFFQJONJOEUIBUBDUJWBUJPOPGUIFiBass EQw
NBZSFRVJSFMPXFSJOHUIF$)iInput
SenswUPNBJOUBJODMFBONBYJNVNPVUQVU
/FYUUVSOZPVSBUUFOUJPOUPUIFiCH
3&4 Input SectionwBOETFMFDUix1wPOUIF
iFreq. RangewTXJUDIiHPw IJHIQBTT
POUIFiFilter TypewTXJUDIBOEi12dBwPS
i24dBwPOUIFiFilter Mode/SlopewTXJUDI
BOEBOBQQSPQSJBUFiFilter Freq.w BHBJO
)[JTBHPPETUBSUJOHQPJOU
After proper adjustment of the CH
BOE$)iInput RangewBOE
iInput Sens.wDPOUSPMTVTJOHUIFNFUIPE
shown in Appendix B (page 22), you can fine tune filter frequencies and slopes and attenuate either pair of channels to achieve proper balance. For precise filter frequency information refer to Appendix A (page 22).
This configuration requires that the separate subwoofer amplifier has a
In this configuration, CH 1&2 of the 450/4v2 will drive front component speakers (stereo 150W x 2) with
The separate amplifier will drive the subwoofer system with
GSFRVFODZPG)[UPTUBSU 5IFJOQVUTPGUIF
subwoofer amplifier may or may not be connected to the preamp outputs of the 450/4v2, depending on which connection option you choose.
Input connection options for a
A)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 is connected to the CH 1&2
JOQVUTPGUIFW TFMFDUi2chwPOUIF
iInput ModewTXJUDIJOUIFiCH 1&2 Input
Sectionw $POOFDUUIFTVCXPPGFSBNQMJGJFS
inputs to the preamp outputs of the 450/4v2
4FMFDUi1&2wPOUIFi4JHOBM'SPNwTXJUDIJO
UIFiPreamp Output Sectionw
Result: the relative level of the LF and front and rear HF channels will be fixed by the 450/4v2’s
iInput Sens.wTFUUJOHTBOEXJMMOPUCFVTFS
adjustable from the front of the vehicle.
B)Fade Subwoofer Level vs. HF 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 TFMFDUi2chwPOUIF
iInput ModewTXJUDIJOUIFiCH 1&2 Input Sectionw 5IFTFDPOETUFSFPQBJSPGTPVSDF unit outputs 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 level of the subwoofer amplifier’s input relative to the HF channels, but cannot control
14 JL Audio - 450/4v2 Owner’s Manual | 15 |
