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TD-001517-01
K.2 Series Service Manual
4. Operational description
4.1 Series description
The QSC K.2 Series represents the best-in-class loudspeaker for today’s demanding audio professionals. The perfect com-
bination of elegant design, superior audio performance, high functionality, simple and intuitive operation, and genuine QSC
reliability, K.2 delivers extraordinary results for users in both portable and installed applications.
The 2000 Watt power module delivers ample burst and continuous power for the loudspeaker’s premium drivers. It has
been designed with very low-noise fan cooling, enabling the enclosures to be used in settings where background noise
must be kept to a minimum. Carefully tailored, subtle and sophisticated dynamics processing is used to protect the drivers
from damage and the performance from distortion.
Each model is housed in a rugged ABS enclosure with a professional yet unobtrusive appearance that is at home in any
application. Each model can be utilized in either main PA or floor monitor applications, while ergonomic handles and a
heavy-duty steel grille with fabric lining further enhance overall appearance and functionality. The dual pole cups allow a
zero or 7.5 degree downward tilt when deployed on a pole. This allows for more even coverage across the listening area
and less problems due to rear wall reflections.
4.2 Model descriptions
The K.2 series has three loudspeaker models: K8.2, K10.2, and
K12.2. The enclosures are constructed of ABS plastic and painted
over with QSC black (RAL color # 9011). The front grille is 16
gauge steel and finished with black powder coat to best match the
enclosure color. Behind the grille is the main baffle of the speaker.
The baffle design incorporates a wave guide that determines the
coverage angle of the loudspeaker. Attached to the baffle are the
two transducers — the low and high frequency. Each model has
a different size low frequency woofer. The woofer diameter on
the K8.2 is 8”, K10.2 is 10” and K12.2 is 12”. The bass response
of each model is increased as woofer diameter size increases. All
models share the same 1.4” titanium high frequency compression
driver.
The transducers are powered by a brand new two-channel class D
amplifier module, which is fastened to the rear of the enclosure.
Unlike the original K series enclosures, the K.2 series enclosures
are sealed off in the rear, leaving only a small hole for the Molex
connector to fit through. When the amplifier module is fastened to the enclosure, an air-tight seal is created around the
Molex connector. The amplifier module is bi-amped. The low frequency channel outputs frequencies below 2▲kHz to the
low frequency transducer, while the high frequency channel outputs frequencies above 2▲kHz to the high frequency trans-
ducer.
All K.2 models are effective as mains or monitors. They can be placed sideways in the monitor wedge position. All models
share the same handles and hardware. The dual position pole-cup piece is the same on each model. The speakers can be
placed on a speaker stand at a 0 or 7.5 angle down-tilt position. Several mounting points are available for vertical suspen-
sion with QSC’s M10 Kit-C. If horizontal suspension is preferred, a yoke mount kit must be used.
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