User manual QSC AUDIO KW122

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Manual abstract: user guide QSC AUDIO KW122

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

[. . . ] KW Series User Manual KW122 ­ 75° 1000 W active 12" (300 mm) 2-way loudspeaker system KW152 ­ 60° 1000 W active 15" (380 mm) 2-way loudspeaker system KW153 ­ 75° 1000 W active 15" (380 mm) 3-way loudspeaker system KW181 ­ 18" (460 mm) 1000 W subwoofer system TD-000315-00-B *TD-000315-00-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. Install in accordance with QSC Audio Product's instructions and under the supervision of a licensed professional installation engineer. [. . . ] Use only the power cable that is correct for your location. AC Mains Disconnection Turn the POWER switch to the OFF (not ON) position. To remove the power cord from the loudspeaker system, grasp the IEC connector's plastic body, press the yellow latch release button and pull. POWER Switch Push in on the top of the rocker switch (labeled ON) to apply AC mains power to the loudspeaker's power supply. Push in on the bottom of the rocker switch to turn the powered loudspeaker off. When in the ON position, the green STBY LED and the red LIMIT (limiter) LED on the rear panel illuminate. After a few seconds the red LIMIT LED and the green STBY LED extinguish, and the blue POWER LED illuminates. Rear POWER Indicator LED The blue POWER LED on the rear panel illuminates when: the AC mains are functioning properly, the AC mains power cord is connected properly, the POWER switch is in the ON position, and the unit is not in standby. The rear POWER LED extinguishes when the AC mains power cord has been removed from the loudspeaker or source, the POWER switch is in the off (not ON) position, or the amplifier enters standby. 10 If the rear POWER LED does not illuminate when the POWER switch is placed in the ON position during the first 5 minutes of power being applied, verify the AC mains power cord is properly attached to the loudspeaker and plugged into the AC source outlet. If the AC mains cord is serviceable and the AC mains outlet is operating properly, but the loudspeaker fails to operate, the loudspeaker may require servicing. Contact QSC's Technical Services department. System Power Sequencing Proper power-on/power-off sequencing can help prevent unexpected sounds from being produced by the system (pops, clicks, thumps). These unintended sounds can be unpleasant and take away from the overall professionalism of the presentation. 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(s) then turn on the "top-boxes" (KW122, KW152, KW153). Power-off Sequence: Turn off "top boxes", turn off subwoofer(s), and then turn off all source devices. If a KW Series speaker is being driven from the output of another KW Series unit, it should be turned on after the unit feeding the audio signal, and turned off before the unit feeding the audio signal. EN Input Connections KW122, KW152, KW153 The KW122, KW152 and KW153 are designed to accept microphone-level and line-level inputs with several different connectors. Channel A Mic/Line Input Combination XLR-M and ¼" Phone Jack 2. Channel B Line Input Combination XLR-M and ¼" Phone Jack 3. Channel B Gain 8 9 1 3 5 2 4 6 7 11 Channel A Channel A accepts either microphone or line level inputs. The MIC/LINE IN A inputs can use either a: · · Male XLR connector, or a Male 1/4" phone jack (TS or TRS type). The KW122, KW152, and KW153 feature a 4-position rotary switch (MIC/LINE GAIN) to provide input gain flexibility. · · · · 0 dB ­ Regular line level, no additional gain. 12 dB ­ Pre-amp is engaged, primarily for low line levels that need extra gain. For microphones with lower output levels that need extra gain. EN The Mic settings (24 and 36 dB) should only be used if a microphone is connected directly to the MIC/LINE IN A. It is recommended that you move the GAIN A knob to the OFF position, or power down the loudspeaker, before changing the MIC/LINE GAIN switch. If you change the switch while audio is being processed there will be very noticeable changes in the output level. [. . . ] A small amount of current will continue to flow from the AC power source into the power supply of the KW Series. This current keeps the power supply and DSP "awake" to reduce turn on time when the system is brought out of standby. The power-up time of the amplifier is negligible and is shorter than the latency of the DSP, so no signal is cut off when the KW Series system is brought out of standby. A KW Series loudspeaker can also be manually brought out of standby by turning the POWER switch off and then back ON. Front LED Functions The front LED may be set to any of three modes by the FRONT LED switch on the rear panel. [. . . ]

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