Inspection and preventive maintenance
Listening test
enclosure
preset
usable bandwidth
K2
[K2 70]
35 Hz - 20 kHz
Kara
[KARA]
55 Hz - 20 kHz
SB28
[SB28_100]
25 Hz - 117 Hz
KS28
[KS28_100]
25 Hz - 110 Hz
K1-SB
[K1SB_60]
30 Hz - 80 Hz
Procedure
1.
Load the preset on an LA4X / LA8 / LA12X amplied controller.
2.
Connect a sinus generator to the amplied controller.
Risk of hearing damage
Set a low sound level to start and use ear protection to adjust before testing.
3.
Scan the bandwidth focusing on the usable range.
The sound should remain pure and free of unwanted noise.
Troubleshooting for LF speakers
One or more LF speaker produces distorted, buzzing, rubbing, clicking, mufed or weak sound.
Possible causes
• The screws are not tightened with the appropriate torque.
• There is an air leak in the gasket.
• There is dust on the cone.
• The cone is damaged.
• The surround is torn or delaminated.
• The voice coil or the spider is damaged.
Procedure
1.
Perform the speaker disassembly procedure.
2.
Visually inspect the cables and the connectors.
3.
Visually inspect the speaker cone, the voice coil and the spider.
If any damage is visible, replace the speaker.
4.
Carefully clean the speaker with a dry cloth.
5.
Perform the reassembly procedure.
Replace the speaker gasket and the screws.
Apply the recommended torque.
6.
Repeat the listening test.
If the problem persists, replace the speaker.
Troubleshooting for HF drivers
One or more HF driver produces high-frequency harmonic distortions, strange vibrations or weak sound.
Possible causes
• There are foreign particles on the air gap.
• The diaphragm is not centered correctly.
• The screws used for reassembly are too loose.
• The diaphragm is damaged.
Procedure
1.
Perform the diaphragm disassembly procedure.
K2 owner's manual (EN) version 1.1
59
Summary of Contents for K2
Page 1: ...K2 owner s manual EN ...
Page 82: ...Rigging procedures 5 Pin the arms 82 K2 owner s manual EN version 1 1 ...
Page 142: ...Corrective maintenance 3 Remove the HF driver assembly 142 K2 owner s manual EN version 1 1 ...
Page 147: ...Corrective maintenance K2 owner s manual EN version 1 1 147 ...
Page 182: ...Pickup points guidelines 182 K2 owner s manual EN version 1 1 ...