Transducer And Switch Service; Lf Loudspeaker; Hf Diaphragm - L-Acoustics 12XT Manuel D'utilisation

8.3

Transducer and switch service

!
In the following replacing procedures screw in each screw to the torque value of 5 N.m (45 in.lb
Add threadlocker to any screw which will be in contact with a metallic part (see section 8.4).
IMPORTANT
8.3.1

LF loudspeaker

If damaged, the 12" LF loudspeaker should be removed and repaired or replaced as described below.
Note: The LF and HF transducers are interdependent. Therefore, a recone kit is available should the user wants to
repair the LF loudspeaker only. Alternatively, reconing can be performed by L-ACOUSTICS
12" loudspeaker (including HF driver) removing procedure
1. Roll both rubber bands back away from the grill.
2. Remove the grill: remove the 4 pozidrive screws, lift up the grill (use the flat screwdriver).
3. Remove the loudspeaker coaxial assembly: remove the 8 hex screws with grower and standard washers, lift up
the loudspeaker (use the flat screwdriver).
4. Place the loudspeaker coaxial assembly in front of the enclosure with LF cone facing the table.
5. Disconnect the four cables (1 red, 1 black, 1 blue, and 1 white one) from the transducer terminal posts: push
on the spring-loaded terminal post, slide the cable out, and release the terminal post.
12" loudspeaker (including HF driver) replacing procedure
1. Place the loudspeaker assembly in front of the enclosure with cone facing the table.
2. Connect the four cables to the transducer terminal posts (push on the spring-loaded terminal post, slide the
cable in, and release the terminal post): red = LF+ (LF red terminal post), black = LF- (LF black
terminal post), blue = HF+ (HF red terminal post), white = HF- (HF black terminal post).
3. Install the loudspeaker assembly in the enclosure and screw in the 8 hex screws with grower and standard
washers: into each hex screw insert a grower washer and then a standard washer (following this order) and
screw in the assembly to one of the eight locations.
4. Install the grill (logo oriented towards the active/passive switch) and screw in the 4 pozidrive screws
(pay attention for the tissue to slide along the inside of the cabinetry).
5. Put in place both rubber bands on the grill.
8.3.2

HF diaphragm

If damaged, the HF diaphragm should be removed and replaced as described below.
Note: The LF and HF transducers are interdependent. Therefore, replacing the full HF driver is only possible by
replacing the LF/HF block (as described in section 8.3.1).
HF diaphragm removing procedure
1. Roll both rubber bands back away from the grill.
2. Remove the grill: remove the 4 pozidrive screws, lift up the grill (use the flat screwdriver).
3. Remove the loudspeaker coaxial assembly: remove the 8 hex screws with grower and standard washers, lift up
the loudspeaker (use the flat screwdriver).
4. Place the loudspeaker coaxial assembly in front of the enclosure with LF cone facing the table.
5. Disconnect both cables from the HF driver terminal posts (blue and white cables): push on the spring-loaded
terminal post, slide the cable out, and release the terminal post.
6. Unscrew the 3 hex screws from the back cover, pull the back cover out.
7. Pull the diaphragm out from the magnet.
12XT_UM_ML_1.2
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® (see section 8.4).
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