User manual QSC AUDIO KSUB

[. . . ] 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. [. . . ] 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). 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. 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. (Figure 6) The MIC setting should only be used if a microphone is connected directly to the MIC/LINE input. 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. 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. Check all connections and the status of the device delivering the signal. Channel B will accept Line Level input only, by connecting a male XLR cable or a male 1/4" phone cable (either TS or TRS type may be used). Channel B will also accept mono or stereo Line Level input on a pair of RCA (phono) jacks. * Gain for signal delivered on the Channel B line level XLR/1/4" combination jack and RCA (phono) jacks is set using the Channel B Gain knob. The Channel B Gain knob will control the input gain of Channel B, as well as 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. Check all connections and the status of the device delivering the signal. [. . . ] The power up time of the amplifier is negligibly small and is shorter than the latency of the DSP, so no signal will be cut off when the K Series system is brought out of standby. A K Series loudspeaker can also be brought out of standby manually by turning the power switch off and then back on. Front Power LED Functions The Front Power LED may be set to any of three modes by the rear-mounted Power LED switch. (Figure 11) · From the factory, the Power LED switch is set to the PWR position. The Front Power LED will illuminate when the power switch is in the ON position and the unit is not in Standby. [. . . ]