7
TD-001536-01-A
Applications and Installation
WARNING!:
Before placing, installing or mounting any speaker product, inspect all hardware, cabinets, transducers,
brackets and associated equipment for damage. Any missing, corroded, deformed, or non-load rated component could
significantly reduce the strength of the installation or placement. Any such condition severely reduces the safety of the
installation and should be immediately corrected. Use only hardware which is rated for the loading conditions of the
installation and any possible short-term, unexpected overloading.
Never exceed the rating of the hardware or equipment.
Consult a licensed, professional engineer regarding physical equipment installation. Ensure that all local, state and national
regulations regarding the safety and operation of loudspeakers and related equipment are understood and adhered to.
IMPORTANT!:
In order to maintain the acoustic properties of the KS212C subwoofer, do not place the unit closer than
50 mm (20 in) from a wall or other object that would reflect sound waves.
Placement
Make sure that the KS212C sub is placed no closer than 20 in
(50 cm) to the back wall of the stage.
Side-by-side KS212C subs should be at least 20 inches (50 cm)
away from each other.
Stacking the KS212C
You can stack KS212C subwoofers in a horizontal orientation by
matching the four rubber feet on the bottom of the top unit to the
four cups on the top of the bottom unit. Figure 4 provides a picture
worth a thousand words. QSC recommends that you stack no
more than two KS212C in order to maintain the cardioid pattern.
Stacking more boxes will result in less rejection from the rear.
• One single sub offers 15 dB front-to-rear attenuation at 70 Hz
• Two subs stacked offers 12.5 dB front-to-rear attenuation at 70 Hz.
• Three subs stacked offers 10 dB front-to-rear attenuation at 70 Hz.
In addition, you can support a loudspeaker with the subwoofer in the stacked
configuration.
WARNING!:
Do not stack the KS212C units in a vertical orientation.
— Figure 3 —
Minimum 20 in / 50 cm
Front of Stage
Back W
all of Stage
Minimum
20 in / 50 cm
— Figure 4 —
