Active/Passive Switch - L-Acoustics 12XT Manuel D'utilisation

12XT 12XT
12XT 12XT
COAXIAL ENCLOSURE COAXIAL ENCLOSURE COAXIAL ENCLOSURE COAXIAL ENCLOSURE
user manual user manual
user manual user manual
VERSION 1.4
HF diaphragm replacing procedure
1. Ensure that the voice coil gap on the driver is free from any particles. If necessary, clean out the gap by using 2-
sided tape.
2. Install the new diaphragm in the gap.
3. Install the back cover on the diaphragm.
4. Screw in the 3 hex screws on the back cover (3 N.m/27 in.lb
every moment while screwing in so as to properly center the diaphragm.
5. Apply a low level LF sine wave (for example: 1 volt at 440 Hz) to ensure that the diaphragm is properly
centered in the gap (the sound should remain pure and free of any unwanted noise). If not, slightly unscrew,
center, screw, and make another test.
6. Connect both cables to both new diaphragm terminal posts: connect the blue cable to the red terminal
post and the white cable to the black terminal post (push on the spring-loaded terminal post, slide the
cable in, and release the terminal post).
7. Install the loudspeaker assembly in the enclosure and screw in the 8 hex screws with split and flat washers:
into each hex screw insert a split washer and then a flat washer (following this sequence) and screw in the
assembly to one of the eight locations (5 N.m/45 in.lb
8. Install the grill (logo oriented towards the pole mount socket) and screw in each of the 4 Torx
(4 N.m/36 in.lb ) at 10 mm/0.5 inch besides the previous drilling. Note: Pay attention for the fabric to slide
f
along the inside of the cabinetry.
9. Put in place both rubber bands on the grill.
8.3.3

Active/passive switch

If damaged, the active/passive switch should be removed and replaced as described below.
Active/passive switch removing and replacing procedure
1. Put the enclosure on a flat surface and roll both rubber bands back away from the grill.
2. Remove the grill: remove the 4 Torx
3. Remove the loudspeaker coaxial assembly: remove the 8 hex screws with split and flat washers,
lift up the loudspeaker (use the flat screwdriver).
4. Place the loudspeaker coaxial assembly with LF cone facing the flat surface.
5. Remove the active/passive switch: unscrew both Torx
the inside of the enclosure.
6. Select the ACTIVE setting by turning the head counterclockwise.
7. Lift the red tongue counterclockwise and separate the head/plate assembly from the switch.
8. Unscrew the plastic bolt (use pliers) and washer located under the plate and separate the head from the plate.
9. On the new active/passive switch, select the ACTIVE setting by turning the head counterclockwise, lift the
red tongue counterclockwise and separate the head from the switch.
10. On the old switch, slightly unscrew a cable locking screw and slide the cable out.
11. Immediately slide the cable in the corresponding location on the new switch, screw in to lock.
12. Repeat the steps 10 and 11 for the 13 remaining cables.
13. On the new head, unscrew the plastic bolt and washer.
14. Install the new head on the metal plate, insert the plastic washer and then the bolt (in this sequence), screw
in the bolt so as to secure the head on the plate (use pliers).
15. Orient the head so as the white mark will be in the ACTIVE setting when the plate is mounted on the
enclosure (see section 6.2).
!
CAUTION
12XT_UM_ML_1-4
®
screws, lift up the grill (hands through the handles).
This step is crucial as it will allow the final user to identify without error if the 12XT
is in the ACTIVE or PASSIVE setting (remember that inverting these settings may
definitely damage the transducers).
The orientation convention is described in section 6.2.
w w w . l - a c o u s t i c s . c o m
). Note: Balance the torques between screws at
f
).
f
®
screws, remove the head/plate/switch assembly from
®
screws
22 en 22
22 22