Maintenance Information; Testing Procedure; Acoustical Check; Mechanical Check - L-Acoustics K1-SB Manuel D'utilisation

K1- - - - SB K1 SB
K1 K1 SB SB
arrayable lf enclosure for K1 arrayable lf enclosure for K1 arrayable lf enclosure for K1 arrayable lf enclosure for K1
user manual user m anual
user m user m anual anual
VERSION 2.0
8 8 8 8 CARE AND MAINTENANCE CARE AND MAINTENANCE CARE AND MAINTENANCE CARE AND MAINTENANCE
8.1

Maintenance information

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The L-ACOUSTICS K1-SB enclosure has been designed for various, intensive indoor and outdoor sound
reinforcement applications. To fulfill such demanding conditions K1-SB contains high-grade and reliable components:
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Weather-resistant transducers.
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Baltic birch plywood cabinet.
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Polyester powder-coated steel grill.
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High resistance, Airnet
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Oxidation-resistant screws and rigging points.
However, in order to ensure product performance and safety, it is essential to frequently inspect the K1-SB cabinet.
These checks need to be done on a regular basis depending on the conditions of system use. The testing procedure
consists of three steps as described in [8.2].
8.2

Testing procedure

8.2.1

Acoustical check

Connect a sweep frequency generator to the active input of the LA8 amplified controller. Apply a sweep from 34 Hz to
200 Hz with a maximum voltage of 0.5 volts (-4 dBu, -6 dBV): the sound should remain pure and free of any
unwanted noise.
0.5 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
In case of acoustical trouble, apply the Mechanical check [8.2.2] to verify if it is due to a structural vibration. If the
problem persists, replace the faulty electrical component [8.3.4-8.3.5].
8.2.2

Mechanical check

1. Inspect the general aspect of the enclosure and attached parts (no signs of deformation, fissure, or corrosion).
2. Check that all fixed parts are locked tight to the enclosure (rigging elements, grill, connector plate, and transducers).
3. Check that all mobile parts operate normally (ball-locking pins, rear arms, angle arms).
4. Check the quality of contact and locking action of the SpeakON
In case of mechanical trouble, lock tight or replace the faulty component IF it is authorized [8.3]. Otherwise, contact
®
an L-ACOUSTICS authorized representative.
8.2.3

External aspect check

1. Remove the dust from the front face with a vacuum device.
2. If necessary, repaint the cabinet (paint reference given in [8.3.1]).
If paint is applied, protect the mechanical and plastic parts.
Do not apply paint to the grill fabric as it could fill the holes and deteriorate the acoustic
transparency.
IMPORTANT
K1SB_UM_ML_2-0
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non-biodegradable front grill fabric.
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socket.
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