User manual QSC AUDIO K12

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Manual abstract: user guide QSC AUDIO K12

Detailed instructions for use are in the User's Guide.

[. . . ] K Series User Manual K8 ­ 105° 1000 W active 8" (200 mm) 2-way loudspeaker system K10 ­ 90° 1000 W active 10" (250 mm) 2-way loudspeaker system K12 ­ 75° 1000 W active 12" (300 mm) 2-way loudspeaker system KSub ­ Dual 12" (300 mm) 1000 W active 4th-order bandpass subwoofer system TD-000280-00-B *TD-000280-00-B* IMPORTANT SAFETY PRECAUTIONS AND EXPLANATION OF SYMBOLS WARNING! CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE THE AMPLIFIER COVER. REFER SERVICING TO QUALIFIED PERSONNEL. The lightning flash with the arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsulated "dangerous" voltage within the product's enclosure that may be of sufficient magnitude to constitute a risk of shock to humans. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operation and maintenance (servicing) instructions in this manual. WARNING: To prevent fire or electric shock, do not expose this equipment to rain or moisture. [. . . ] These unintended sounds can be unpleasant and take away from the overall professionalism of the presentation. Always follow the rule that speakers are "last on, first off". Power On Sequence: Bring the output level control of the mixer (or other audio source) feeding your speakers to its minimum position. Turn on all source devices (CD players, mixers, instruments), turn on subwoofer, then turn on the "top-boxes" (K8, K10, K12). The level controls on your mixer may now be brought up. Power Off Sequence: Turn off "top boxes, " turn off subwoofer, then turn off all source devices. If a K Series speaker is being driven from the output of another K Series unit, it should be turned on after the unit feeding it signal, and turned off before the unit feeding signal. 9 Input Connections K8, K10, K12 Channel A MIC/Line Input Combination XLR-M and 1/4" Phone Jack Channel A MIC Level Yellow LED Indicator Channel A MIC/Line Level Switch Channel A Green Signal Present LED Channel B Line Input Combination XLR-M and 1/4" Phone Jack Channel B Line Input Phono (RCA) Jacks Channel B Green Signal Present LED Channel A Gain Channel B Gain The K8, K10 and K12 are designed to accept MIC Level and Line Level inputs with several different connectors. There are three input connection points on the input panel. Channel A will accept MIC or Line Level inputs by connecting a male XLR cable or a male 1/4" phone cable (either TS or TRS type may be used). For MIC Level, the MIC/LINE selector switch must be in the "MIC" position. (Figure 5) When the selector switch is in the MIC position, activating the MIC Pre-amp, the yellow MIC level LED indicator will turn on. The MIC setting should only be used if a microphone is connected directly to the MIC/LINE input. Note that the input does not provide phantom power. The LINE setting should be used for most other audio inputs. (Figure 6) The MIC setting should only be used if a microphone is connected directly to the MIC/LINE input. Using the MIC setting for other purposes may introduce distortion. Care should be taken when switching to the MIC position as the output level will increase significantly when the switch is flipped. Gain for signal delivered on the Channel A XLR/1/4" combination jack is set using the Channel A Gain knob. This control sets the sensitivity of Channel A, and thereby the amount of signal sent to the power amplifier and, in turn to the loudspeaker components. It also sets the amount of signal sent to the Post-Gain Line Output. The green SIGNAL LED will illuminate when signal is present, regardless of the amount of gain as set by the Gain knob. If the LED does not illuminate, the input is not receiving any signal or the level of the signal is significantly low. [. . . ] · In the "OFF" position, the Front Power LED will not illuminate. This setting is recommended in applications where the Front Power LED may be visually objectionable while the unit is operating. · In the LIMIT setting the Front Power LED will track the LIMIT LED on the rear of the unit. When the K Series is in Limiting (meaning that one or more of the limiters is engaging to protect some part of the system) the Front Power LED will glow brighter in response to the limiting function. [. . . ]

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