QSC KS112, KS118, KS212C User manual

KS Series

User Manual

KS112 – 2000 watt Active Subwoofer

KS118 – 3600 watt Active Subwoofer

KS212C – 3600 watt Active Cardioid Subwoofer

KS112

KS118

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KS212C

EXPLANATION OF SYMBOLS

The term “WARNING” precedes instructions that concern personal safety. Failure to follow them may result in bodily injury or death.

The term “CAUTION” precedes instructions that concern possible damage to physical equipment. Failure to follow them may result in equipment damage to equipment that may not be covered under the warranty.

The term “IMPORTANT” precedes instructions or information that are vital to the successful completion of theprocedure.

The term “NOTE” precedes additional useful information.

NOTE: The lightning ﬂash with arrowhead symbol in a triangle alerts the user to the presence of uninsulated dangerous voltage within the product’s enclosure that may constitute a risk of electric shock to humans.

NOTE: The exclamation point within a triangle alerts the user to important safety, operating, and maintenance instructions in this manual.

IMPORTANT SAFETY INSTRUCTIONS

WARNING: TO PREVENT FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. DO NOT USE THIS APPARATUS NEAR WATER.

1. Read these instructions and keep a copy for future reference.

2. Strictly follow and heed all instructions and warnings.

3. Do not use or submerge this loudspeaker product in or near water or liquids.

4. Clean only with a dry cloth. Do not use any aerosol spray, cleaner, disinfectant or fumigant on, near, or into the loudspeaker.

5. Do not block any ventilation opening. Install in accordance with the manufacturer’s instructions.

6. Do not install the loudspeaker near any heat sources, such as radiators, heat registers, stoves, or other apparatus (including ampliﬁers).

7. Use extra caution with any attachments, accessories, mounts, or brackets that are not speciﬁed or approved by QSC, LLC.

8. Refer all service to qualiﬁed personnel. Service is required if the loudspeaker has been damaged in any way, such as liquid being spilled into it, objects falling into it, exposure to rain or moisture, abnormal operation, or being dropped.

9. Observe all applicable local codes.

10. Consult a licensed, professional engineer when any doubt or questions arise regarding a physical equipment installation.

11. Do not attempt to defeat the safety features of the grounding-type plug, which has two blades plus a grounding prong. The grounding prong ensures your safety; plug the power cord into only a properly grounded or earthed outlet. If the plug provided does not ﬁt into an outlet, have an electrician replace the obsolete outlet. Unplug the loudspeaker during lightning storms or when unused for long periods of time.

12. Protect the power cord from damage. Do not allow it to be stepped on or pinched, especially at plugs, convenience receptacles, and chassis entry points.

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Maintenance and Repair

WARNING: Advanced technology—e.g., the use of modern materials and powerful electronics—requires specially adapted maintenance and repair methods. To avoid subsequent damage to the equipment, personal injury, and/or creation of additional safety hazards, have all maintenance or repair work on the equipment performed only by a QSC authorized service center or an authorized QSC International Distributor. QSC is not responsible for any injury, harm, or related damages that arise from any failure of the customer, owner, or user of the equipment to facilitate those repairs.

Life Cycle: 10 years Storage Temperature range: -20° C to +70° C Relative Humidity range: 5 - 85% RH

FCC Statement

NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules.

These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

• Consult the dealer or an experienced radio/TV technician for help.

RoHS Statements

These products are in compliance with “China RoHS” directives per GB/T26572. The following table is provided for product use in China and its territories:

The KS112, KS118 and KS212C 这些产品

有害物质

部件名称

(Part Name)

电路板组件

(PCB Assemblies)

机壳装配件

(Chassis Assemblies)

本表格依据 SJ/T 11364 的规定编制。(This table is prepared following the requirement of SJ/T 11364.) O: 表示该有害物质在该部件所有均质材料中的含量均在 GB/T 26572 规定的限量要求以下。 O: Indicates that the concentration of the substance in all homogeneous materials of the part is below the relevant threshold speci󽗉ed in GB/T 26572. X: 表示该有害物质至少在该部件的某一均质材料中的含量超出 GB/T 26572 规定的限量要求。 X: Indicates that the concentration of the substance in at least one of all homogeneous materials of the part is above the relevant threshold speci󽗉ed in GB/T 26572.

（目前由于技术或经济的原因暂时无法实现替代或减量化) (Replacement and reduction of content cannot be achieved currently because of the

technical or economic reason.)

铅

(Pb)

X O O O O O

汞

(Hg)

(Hazardous Substances)

镉

(Cd)

六价铬 (Cr(vi))

多溴联苯

(PBB)

多溴二苯醚

(PBDE)

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Warranty

For a copy of the QSC limited warranty visit the QSC website at www.qsc.com

Package Contents

KS112, KS118, or KS212C subwoofer

QSC limited warranty TD-000453

35 mm M20 915 mm (36 in) loudspeaker pole (included with the KS212C only)

Locking AC power cord

Quick start guide TD-000499 – KS212C TD-001518 – KS112 TD-001551 – KS118

White QSC logo

Powered loudspeaker safety sheet TD-000337

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KS112 / KS212C Features

Top Bottom

Horizontal Top

Horizontal Bottom

Front

Rear

1. Alignment cups for stacking

2. Four low-noise, heavy-duty casters

– Figure 1 –

9. Front power LED

10. Ampliﬁer power module and controls

3. Ampliﬁer protection rails

4. M20 threaded socket for 35 mm loudspeaker pole

5. Slip-resistant feet - four on the bottom

6. Slip-resistant feet - four on the side

7. Cast aluminum handles

8. M20 threaded socket for 35 mm loudspeaker pole

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KS118 Features

Left Side

Right Side

To p

Front

Bottom

Rear

– Figure 2 –

1. Alignment cups for stacking

2. Four low-noise, heavy-duty casters

3. Ampliﬁer protection rails

4. M20 threaded socket for 35 mm loudspeaker pole

8. Front power LED

9. Ampliﬁer power module and controls

5. Slip-resistant feet - four on the bottom

6. Slip-resistant feet - four on the side

7. Cast aluminum handles

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About Cardioid Subwoofer Radiation

The term cardioid refers to a heart-shaped coverage pattern of an audio device. For example, a cardioid microphone is most sensitive at the front (on-axis), and least at the rear (180 degrees off-axis). A cardioid subwoofer operates the same way and is loudest at the front and quietest at the rear.

Subwoofer Energy Dispersion

Typical

Rear

– Figure 3 –

Low frequency energy from a conventional subwoofer is effectively omnidirectional below 200 Hz. This is because the directivity of the subwoofer is related to the ratio of its size to the length of the sound wave it produces. The length of the sound wave is inversely proportional to its frequency, and therefore when the low frequency waves are much longer than the dimensions of the subwoofer transducer and enclosure, the radiation pattern becomes more equal in all directions, including to the sides and back.

A cardioid subwoofer arrangement employs both front- and rear-ﬁring woofers. Some clever use of spacing, delay, and polarity produces cancellation in the rear-ﬁring energy and reinforcement in the forward-ﬁring energy. Historically, creating cardioid subwoofer arrays has required the user to make complicated calculations involving physical spacing and signal processing. Two QSC subwoofer models make those calculations unnecessary.

Cardioid

Rear

FrontFront

KS212C

The KS212C is powered by a dual 1800-watt Class D ampliﬁer and incorporates dual 12-inch long-excursion drivers that are each arranged in a sixth-order bandpass chamber. QSC’s latest DSP technology performs the complex processing that makes these mirrored components interact at the rear of the enclosure to produce a desirable cancellation, while simultaneously interacting at the front of the enclosure to produce equally desirable summation. As a result, the output pattern is a cardioid shape, with 15 dB higher level at the front than at the rear. To put this into perspective, 15dB is equivalent to the difference between 30 watts of power and 1000 watts.

KS118

The KS118 is a very high output active subwoofer, powered by a 3600-watt Class D ampliﬁer driving a single 18-inch direct radiating driver. Its on-board DSP menu offers the option of arraying two or more units in a forward/backward cardioid arrangement with 15 dB of rearward rejection. From the subwoofers’ Cardioid menu, select Forward for the units facing the audience and Rear for the ones facing away. This also allows side-by-side or ground-stacked setups.

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+ 16 hidden pages

QSC KS112, KS118, KS212C User manual

Specifications and Main Features

Frequently Asked Questions

User Manual