Harman JBL MS-A1004 Guide De L'utilisateur page 6

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The bass-boost filter in the MS Series amplifiers is a shelf filter that boosts or cuts bass below 60Hz, but never above
160Hz. The range of adjustment is +/–10dB. Additionally, the bass boost or cut is sent to all the amplifiers with which the
control is paired. The bass control works with the crossover filters to ensure that the proper amount of boost or cut is
sent to the subwoofer and the mid-bass or midrange speakers, so the character and apparent location of bass sounds
remain constant. See Figure 5b for the performance of the MS-WBC (as opposed to that of conventional bass controls,
as shown in Figure 5a).
CAUTION: Installation of car audio components requires experience in performing mechanical and electrical proce-
dures. If you feel you lack the required experience or necessary tools, please have your amplifier installed by a qualified
professional technician.
CAUTION: Before installation, disconnect the negative (–) battery terminal to prevent the battery from being drained
while you work on the car and also to prevent damage to the unit.
READ THIS BEFORE STARTING INSTALLATION!
1. JBL MS Series amplifiers include many features not found on conventional car audio amplifiers. The setup procedure for
MS Series amplifiers is different from that of conventional car audio amplifiers. Be sure to carefully read and understand
these instructions before attempting installation.
2. At the installation sites, locate and make a note of all fuel lines, hydraulic brake lines, vacuum lines and electrical
wiring. Use extreme caution when cutting or drilling in and around these areas.
3. Choose a mounting location for the amplifier inside the passenger or cargo area that will ensure no exposure to mois-
ture. Never mount an amplifier outside the car or in the engine compartment.
4. Make sure there is sufficient air circulation at the mounting location for the amplifier to cool itself.
5. Mount the amplifier securely.