8. Crossover circuit - Speaker connection
8.1. precable crossovers - see fig. page 11.
8.2. install crossover under the dashboard. Check precise fit.
8.3. Insert subwoofer and midrange and connect all loudspeakers
(car door: midrange and subwoofer / dashboard: tweeter)
to the crossover circuit (parallel-circuit):
Notice:
You should check the polarity of all subwoofers
before connecting them to the crossover circuit
with a 9 volt battery:
pole of the crossover circuit input to of a 9 Volt battery
pole of the crossover circuit input to of a 9 Volt battery
All subwoofers must move uniformly!
Wrong polarity of a subwoofer can totally
equalize the bass sound!
8. Crossover circuit - Speaker connection
8.1. precable crossovers - see fig. page 11.
8.2. install crossover under the dashboard. Check precise fit.
8.3. Insert subwoofer and midrange and connect all loudspeakers
(car door: midrange and subwoofer / dashboard: tweeter)
to the crossover circuit (parallel-circuit):
Notice:
You should check the polarity of all subwoofers
before connecting them to the crossover circuit
with a 9 volt battery:
pole of the crossover circuit input to of a 9 Volt battery
pole of the crossover circuit input to of a 9 Volt battery
All subwoofers must move uniformly!
Wrong polarity of a subwoofer can totally
equalize the bass sound!
3.1. unclip the plastic frame of the tweeter grill with a taper key and remove it
3.2. unscrew the screw underneath and remove the speaker’s grill
3.3. remove the original tweeter and disconnect the cable
connect the JEHNERT tweeter (1,5 - 4mm
2
)
3.4. Length of cable: up to the crossover- mount underneath the dashboard
3.5. affix the perforated sheet metal to the tweeter. Secure with washer and
hexagon head screw.
3.6. Install the tweeter with the perforated sheet metal in the original mount
and lead the speaker cable to the mount of the crossover.
.
Acoustic TIP:
adjust the tweeter in an angular position to the inner rear
view mirror (not driver’s or co-passenger’s side)
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© JEHNERT SOUND DESIGN
75075/76075 - SL Cabrio
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© JEHNERT SOUND DESIGN
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3. tweeter installation in standard mount of the dashboard
7. installation of the door-lining onto the car doors
7.1. put the door-lining into the upper sealing of the car door
7.2. fit it in contrary order of succession as described on page no. 3
7.3. cut out the moisture protection foil (u-form) and stabilize the lateral cutting
edges in order to avoid vibration noise ( e.g. use a packing tape)
1.1. place the door-lining backside up on a plane surface
1.2. align the adapter plate with speakers instead of the factory installed speaker unit
1.3. mark the outlines of the adapter plate and remove the plate again
fitting of adapter plate 75075 – model up to ‘96:
1. sand the outline marked (adhesive property will be better then)
2. put hot melt adhesive on the outlines.
3. fit in the adapter plate exactly and hold it fast to the door-lining until
the adhesive hardens
fitting of adapter plate 76075 – model from ‘96:
1. sand the outline marked (adhesive property will be better)
2. original screwed joint within the outline marking is used to install the
adapter plate:
• detach original screwed joint
• install adapter plate exactly and tighten the screws
3. put holt melt adhesive on the rest of the plate edge.
4. connect subwoofer and midrange with speaker cable (1,5-4mm
2
) and lead cable
to the mount of the crossover circuit.
Length of cable: up to crossover- mount underneath the dashboard
Remark:
rubber surround of subwoofer touches the expanding rivets of the speaker grills.
But this does not affect the sound (no vibration noise).
mark the oulines of
the adapter plate on
the door-lining
Abb.: 75075-up to’96
Abb.: 76075-ab Bj.96
mark the oulines of
the adapter plate on
the door-lining
use original screwed
joint within the outline
marking for fitting
4. installation of adapter plate onto the door-lining
75075/76075 - SL Cabrio
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© JEHNERT SOUND DESIGN
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© JEHNERT SOUND DESIGN
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==>> continue as follows: prod.code. 75075 or 76075 ==>>
