JBL MS-8 Instruction Manual

Installing Tips & Tricks MS-8

Before installation examine the OEM system

oPark distance control

•Determine if the sound of park distance control is played through front/rear or front and

rear. (BMW often processes PDC signal front by front speakers and PDC rear by rear

speakers)

oCarkit

•Determine if the sound of carkit is played o er front and/or rear speakers

oOEM audio system

•Determine what kind of system you’re dealing with (acti e or passi e, in- or excluding

subwoofers, can you adjust the le el of the subwoofers)

•Determine Xo er frequencies of the original system (Tip: measure signal with pink noise and

analyzing software to analyze frequency response and Xo er points)

•If the OEM system has noise cancellation disconnect the echo cancellation microphone or

disable it by a switch

Tip: Print-out car specific installation manual on www.jbl.com/ms-8

Tip: Google the car’s OEM system and try to find out the OEM set-up before you start installing

Tip: Build your own PC based analyzer, software is for free http://www.trueaudio.com/rta_abt1.htm

Installing tips

oMake sure to connect a (summe ) full-range signal to the inputs of MS-8

•E ery Left inputs of MS-8 will be summed and Right inputs will be summed

•Subwoofers need to be connected to input 7 and/or input 8

•No need to connect center to the input (MS-8 will create e en a better center channel

channel)

oConnect REM IN to remote turn on lead or ACC/+15 ignition wire

•This is better than an auto/sensing switch-on because this pre ents switching on- and off

pops. Also MS-8 needs to be switched on always to process telephone calls, park distance

control signals e en when your radio is off.

Set-up tips

oMake sure bass/treble/balance/fader of OEM system is FLAT and OEM equalizers/dsp functions

are OFF

oWhen assigning Xo er frequencies note that OEM subwoofers (like under seat subs in BMW,

woofer in back shelf of Audi A4 or door woofers Audi A6 ha e an Xo er frequency around

200Hz) make sure to use the right (measured) Xo er frequencies

oWhen you ha e to select Sub (None, 1, 2) this doesn’t mean the number of subwoofers you’ e

installed but the number of (RCA)outputs you will need

oWhen you ha e to select Front/Rear (1 way, 2 way and 3 way) this refers to the number of

outputs you will need

Acoustic calibration

oMake sure all speakers an subwoofers are playing on the same volume

when you calibrate MS-8

(Adjust input sensiti ity and suble els amplifiers to match with each other and OEM)

oMake sure to calibrate at volume level -20 B at MS-8

(-25/-30 B when a itional amplifiers are use )

(Calibration is done by MLS measurement, when you would clip the calibration signal the result

would be disappointing)

After calibration

oRaise the olume of MS-8 back to -5dB/0dB

oIf in your opinion ha e not enough bass increase the subwoofer le el (this is a shelf filter which

means it increases al frequencies below 60Hz) or increase the input sensiti ity/bass le el of

subwoofer amplifier

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