Care And Maintenance; Maintenance Information; Testing Procedure; Check Of Transducers And Enclosure Acoustic Behavior - L-Acoustics KILO Manuel D'utilisation

8

CARE AND MAINTENANCE

8.1

Maintenance information

The L-ACOUSTICS ® KILO enclosure is a technical product designed for intensive and various indoor and outdoor
sound reinforcement applications. To fulfill such demanding conditions, L-ACOUSTICS
grade and reliable components:
• Weather-proof transducers made of materials with high immunity to oxidation.
• Baltic birch plywood cabinetry.
• High resistance, non biodegradable Airnet front grill fabric.
• Screws and rigging points resistant to oxidation.
However, in order to ensure product performance and safety, it is critical to proceed to a regular check of the KILO
enclosure and its internal components. The check frequency varies upon the conditions of system use and the testing
procedure comprises three steps as described in section 8.2. If a speaker is to be replaced follow the procedures
described in section 8.3.
8.2

Testing procedure

8.2.1

Check of transducers and enclosure acoustic behavior

Connect a sweep frequency generator to the active input of the LA4 amplified controller. Apply a sweep from 50 Hz to
100 Hz with a maximum voltage of 0.2 volts (-12 dBu, -14 dBV): the sound should remain pure and free of any
unwanted noise. If not, check the mechanical assemblies and if necessary contact an L-ACOUSTICS
representative to repair or replace the damaged components (see also section 8.3).
!
0.2 volts is a maximum value that can generate very high sound levels at given frequencies.
Use ear protection to set the sound level before testing.
WARNING
Whenever the loudspeaker is replaced, wiring polarity should be checked with a phase checking device. If a transducer
is out of phase, invert the cables connected to its electrical socket. Cabling procedures are given in section 8.3.
8.2.2

Inspection of mechanical assembly and rigging parts

Inspect the general aspect of assembly and check that screws are locked tight (on rigging elements, transducer, grill, and
rear panel). Check the quality of contact and locking action of the Speakon
parts (rear spring-loaded pin, side locking mechanism) and rigging elements (no signs of deformation, indents, or rust). If
necessary, contact an L-ACOUSTICS
8.2.3

Check of external aspect

Remove the dust from the front fabric with a vacuum device. If the protective paint is wasted, repaint the cabinet.
!
If paint is applied, protect mechanical parts.
Do not apply paint to the front grill fabric as it could fill the fabric holes and deteriorate the acoustic
transparency of the material.
IMPORTANT
KILO_UM_ML_1.2
® authorized representative to replace the damaged components.
w w w . l - a c o u s t i c s . c o m
® has designed KILO with high
® sockets. Also check the integrity of mobile
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®
authorized
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