Acoustical check
Listening test
enclosure
preset
usable bandwidth
Kara
[KARA]
55 Hz - 20 kHz
SB18 / SB18i / SB18m
[SB18_100]
32 Hz - 110 Hz
SB28
[SB28_100]
25 Hz - 117 Hz
KS28
[KS28_100]
25 Hz - 110 Hz
KS21
[KS21_100]
31 Hz - 100 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.
Visually inspect the speaker and the cables.
If any damage is visible, replace the speaker.
2.
Carefully clean the speaker with a dry cloth.
3.
Perform the reassembly procedure.
Replace the speaker gasket and the screws.
Apply the recommended torque.
4.
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 screws used for reassembly are too loose.
• The diaphragm is damaged.
Procedure
1.
Perform the diaphragm disassembly procedure.
48
Kara owner's manual (EN) version 1.0
Содержание LA-RAK
Страница 1: ...Kara owner s manual EN ...
Страница 5: ...APPENDIX D Safety pin removal and insertion 199 APPENDIX E Recommendation for speaker cables 200 5 ...
Страница 148: ...Corrective maintenance 5 Secure the handle 5 mm 5 N m 148 Kara owner s manual EN version 1 0 ...
Страница 179: ...Speci cations SB18 dimensions 750 mm 29 5 in 707 mm 27 8 in 553 mm 21 8 in Kara owner s manual EN version 1 0 179 ...
Страница 181: ...Speci cations SB28 dimensions 700 mm 27 6 in 1300 mm 51 2 in 550 mm 21 7 in Kara owner s manual EN version 1 0 181 ...
Страница 201: ...L Acoustics 13 rue Levacher Cintrat 91460 Marcoussis France 33 1 69 63 69 63 info l acoustics com www l acoustics com ...