6. insulation of the door lining
Important
tip:
the use of 2x16mm mid-woofer /side may cause vibrations which lead to
annoying rattle noises in the car door
some helpful tips:
• use the self-adhesive insulation fleece (art.no.: 27000) or a foam material for
the backside of the door lining ( see fig. above ) or
• stabilize the backside of the door lining by means of a special material
(Glass Fibre Filler or stiffening material)
important: keep the cut-outs for the door-airbags and speakers open
• affix the *backside of the inner door metal with self-adhesive asphalt mats (see fig. * )
• by knocking on the car door, vibrations caused by mechanic parts (e.g. Bowden pull wire etc. )
and wiring harness may be found out. Cover these parts with foamed material, felt or
something like that
• cut off overlapping cable tie (rattle noise)
• adhere felt or foamed material under the original
wiring harness
!
Important:
No insulation material behind
- loudspeaker
- doorbolts
- (fig. A): drill a hole for the
installation clip
fig.: backside of the door lining – insulation with our article no.: 27000
moisture protection foil
front side of
inner door metal
*
door metal outside
= back side of the
inner door metal
attention – danger !!
No insulation behind the
side-airbags (fig. B)
75149 - BMW Z 3
- 7 -
© JEHNERT SOUND DESIGN
75149 - BMW Z 3
- 8 -
© JEHNERT SOUND DESIGN
5 . Loudspeaker cables
�
�
5.1. carefully remove the moisture protection foil
5.2.
Important tips against vibration-noise (s.page.8)
It is absolutely necessary to insulate the car doors
5.3. install cables:
installation of crossover - behind the door panel (see page 10):
lead 1 speaker cable (1,5 - 4mm
2
) from amplifier through door
pin/ wiring harness into the car door.
TIP: • close the car door
• open the boot / hood
• door pillar – passage for plastic cable : loosen the upper screw
• open the car door
• door pillar- passage for plastic cable: loosen the lower screw
Or alternatively:
Installation of crossover under the dashboard (see page no.10):
Lead 3 speaker cable (1,5 - 4mm
2
) from amplifier for woofers
midrange and tweeter into the car door.
5.4. reinstall the moisture protection foil
�
for
2x165mm
46149 - BMW Z3
