GLMedia · Prepare the sound system
QSC KS118
KS118 is a powered subwoofer for system integration; it does not replace the speakers reproducing speech.
Ask about rental or technical support
Ask about rental or purchase of a KS118 solution, integration or assistance with system preparation, configuration and audio operation. Start with the date, venue, program and approximate sources. We assess options; quantities, compatibility, availability and terms are confirmed in the proposal.
Model and connections
KS118 has A/B line inputs and XLR pass-through outputs. Before connecting tops, use the unit’s manual to confirm the signal carried by each output and where filtering is applied. Do not assume that adjusting the subwoofer filter also prepares the tops’ feed. Record crossover, delay, DEEP, Cardioid mode and scene before making changes.
Prepare and check
Map console→sub/tops and control owners. Check power, ventilation, handling and exact supports; rehearse speech/music at protected levels and leave a verified operating scene.
Questions and decisions
What does it add to a gala with music?
Separate speech, background music and DJ/band segments. Compare the intended program with tops alone and a designed bass extension. A sub can extend low-frequency reproduction but cannot fix distant microphone pickup or poor rear-room coverage. Agree listening areas, required level and venue restrictions; count/placement follow the system, not attendance.
Can it work with another family’s tops?
Confirm top inputs, filters and control. Use the exact system documentation to identify the tops’ feed and decide whether filtering belongs in the tops or in compatible external processing. Have the responsible technician compare polarity, level and arrival using the same reference, separately and together. Do not copy another brand’s presets or select cardioid without its documented arrangement.
What should be recorded before changing from a band to a DJ?
Record the subwoofer source, the path from the mixer, and each KS118 scene and settings: crossover, level, delay, and cardioid mode. If the system is already aligned, change the program through the intended mix and avoid changing modes simply to get more bass. Selecting a cardioid mode resets delay; apply any delay added afterward equally to every subwoofer in the array. Cardioid Rear also locks some controls. If controls appear locked or the response changes, compare the settings with the technician’s record before modifying the array. To plan rental or shared operation, tell us which equipment is already available, who controls the settings, and the band, DJ, and speech schedule; the full program does not need to be final.
Documentation and references
Related help
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