User manual
QSC-KC12-manual-EN.pdf
Sound
QSC KC12
Choose inputs, mix output and listening positions before deciding quantity or volume.
Explore rental, purchase or technical support
Share the date, venue, likely use, approximate sources and areas for speech, DJ or live music; a sketch is enough to start before the program is final. We can assess rental or purchase options for KC12 or a suitable alternative, and assistance with preparation, mixing, configuration or operation. The proposal must identify components, versions, inputs and routes, supports, power, included equipment and services; quantities, compatibility, planned coverage, availability and terms are confirmed for the actual system.
Model and connections
- System
- KC12S + KC12T; active three-way column system
- Output A
- Input A THRU without DSP
- Output B
- Assignable mix; selection and DSP matter
Speech and music at one or two cocktail-event locations
Define conversation, announcements and music areas. A second unit may distribute listening more effectively; guest counts and added power alone do not establish need. Compare one position, two points or a distributed system using geometry and routes.
More microphones or different zone balances may require a console and separate feeds; another column does not create another mix.
Show preparation
- Identify KC12 components, firmware and available power; use only documented assembly on stable ground.
- With levels protected, select inputs and the feed to the second location; record presets, assigned mix and level.
- Check speech, music and pauses in both areas; agree who controls changes.
Questions and solutions
The microphone works here but not at the second column: which output should I check?
Output A follows input A without DSP; it does not automatically carry every source. Check ASSIGN OUTPUT B selection for a mixed feed. Compare each signal stage, cable and receiving input before raising volume; verify speech and music separately.
Can we mix speech and music without a console?
Local mixing and Bluetooth are available; count simultaneous sources and required controls. Built-in mixing may suit a few sources; compare an external console for several microphones, monitor feeds or different deliveries. Identify inputs, cables and the operator in the proposal.
Will two columns automatically fix a weak rear area?
No. Check positions, obstructions and listening at the front and rear. More level may worsen the near area. We can assess relocation or distributed points and alignment preparation; another event’s delay does not validate this setup.
Does the music preset also suit speeches?
Presets, contour, EQ, sub level and scenes affect results. Record the state and compare speech/music during rehearsal at controlled levels. A saved scene does not know the new room; prepare transitions without resetting during the program.
Can we use only the base or add a subwoofer?
The guide requires SUB ONLY MODE when operating KC12S without KC12T. For an external sub, distinguish THRU A from the post-DSP mix and use the documented function for the exact system. Sub settings do not transfer to a second column; configuration, location and verification belong in the proposal.
The app or level behaves differently: update before the show?
Identify firmware and applicable release notes. QSC documents control changes and fixes in 2.0.28; that does not establish every anomaly’s cause. Plan maintenance out of service with recovery and route testing; consider prepared local control or a wired source for continuity.
Should two KC12 systems sit side by side for more level in one spot?
QSC advises against placing two complete systems next to each other: overlapping columns can cause cancellations and degrade reproduction. This does not automatically add usable level. Compare a better single position with separated points designed for different zones; check the overlap area too.
How should we prepare a microphone for announcements between music?
Aim the PA at the audience and avoid directing its sound into the microphone; check the exact microphone pickup pattern. Rehearse the presenter’s actual path with music lowered before setting the level. If feedback starts, reduce the channel and review placement and open microphones; do not mask it with louder music. We can prepare mixing and operation or a console where zones need different balances.
Manuals and documents for this equipment
Choose the document for the model, revision and language shown. Read it here or download the original PDF.
Official documentation
Prepare a proposal
Explore rental, purchase or technical supportWhen to add subwoofers to the program
Musical objectives and the exact system define the option; a sub does not fix speech clarity.
Define program and responsibilities
Separate speech, background music and DJ/band segments. Identify the instruments, desired musical result, venue restrictions and listening areas. Compare the planned system alone with a compatible extension; for speech, placement or pickup may be the first issue.
The proposal should assign crossover, filters, polarity, level and alignment, and identify the route to each element. An available XLR or another event’s frequency does not establish compatibility. Test separately and together using the same reference, particularly through overlap areas.
Questions and decisions
What can be quoted before the music is finalized?
Prepare a speech base and a provisional music option, identifying equipment, transport, power, space and tuning differences. Share date, venue and likely use; selection and stock are confirmed for the proposal. No quantity or crossover frequency is fixed without exact models and configuration.
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