Dsp Features - QSC K8 User Manual

DSP Features

The K Series features advanced DSP (digital signal processing) circuitry that performs many functions. Some functions are set at the design/production
level and are not user accessible. These functions include crossovers, time alignment, limiting and protection, thermal management and a number of
proprietary features. QSC has designed exclusive DSP functions that greatly enhance the capabilities and performance of the K Series systems.
Proprietary DSP Functions
Excursion Limiting: In addition to signal limiting to protect the amplifier and transducers from overload, the K Series utilizes a proprietary limiter that
prevents woofer over-excursion. Over-excursion occurs when a voltage presented to the woofer causes the cone to physically travel too far. This builds
up excessive heat, stresses the moving parts of the woofer, produces audible artifacts and distortion and reduces the woofer's lifespan. The proprietary
prevent over-excursion without any audible compression, limiting or loss.
DEEP™: Taking advantage of the Excursion Limiter, the DEEP (Digital Extension and Excursion Processing) algorithm functions as a highly musical and
non-distorting low-frequency EQ circuit. More on the DEEP function is available in the EQ section of this manual.
Intrinsic Correction™: Introduced on QSC Concert/Touring products, Intrinsic Correction is a proprietary process and set of signal processing algo-
rithms that address correctable characteristics of transducers and waveguides. The net result is that any K Series system will present extraordinarily
even and consistent energy throughout the physical listening area of the loudspeaker, resulting in a very musical, acoustically transparent system.
DSP User Functions
Low-frequency EQ
On the K8, K10 and K12, there are three low-frequency settings. From the factory, the switch is set to "NORM."
This means that the loudspeaker system is producing a normal low-frequency signal through the woofer. This is
the standard setting for most applications.
When using one of the top boxes with a subwoofer, the switch should be moved to the "EXT SUB" position to
engage the 100 Hz high-pass filter. It is also recommended that the 100 Hz high-pass filter be engaged when using
the K10 or K12 as a floor monitor to prevent excessive bass build up on the stage.
For extra low-frequency extension and low-end presence when using one of the top boxes without a sub, move
the switch to the "DEEP" setting. This will engage the proprietary DEEP algorithm, providing increased low-
frequency extension without causing distortion or woofer over-excursion.
On the KSub there are two low-frequency settings. From the factory, the switch is set to "NORM." This means
that the subwoofer system is producing a non-EQ'd low-frequency signal through the woofer. This is the standard
setting for most applications. (Figure 8)
For extra low-frequency extension and low-end presence, move the switch to the "DEEP" setting. This will engage
the proprietary DEEP algorithm, providing increased low-frequency extension without causing distortion or woofer
over-excursion.
High-frequency EQ
On the K8, K10 and K12 there are two high-frequency settings. From the factory, the switch is set to "FLAT." This
means that the loudspeaker system is producing a flat response through the vocal band. This is the standard set-
(Figure 9)
ting for most applications.
stronger presence for vocal intelligibility and presence. It is generally not recommended to use this setting when
playing full-range music through the system.
(Figure 7)
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– Figure 7 –
– Figure 8 –
– Figure 9 –