4 CHANNEL POWER AMP TA 4D
OPERATING INSTRUCTIONS
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P a g e
monitors, you can mute individual mixes when they are not needed or, when tracking down
problems.
2. COMPONENTS
2.1 Controller Card Module for TA 4D
2.1.1 Signal
The handling of the signal, like equalization, crossover and corrections of the transient behavior of
the components, are taking place entirely in the integrated analog controller card or the F MOD
digital controller card, and these two cards are interchangeable. KS Audio offers a wide selection of
analog controller cards and numerous programs for the F MOD digital controller card, assuring
best results no matter which driver configuration is to be handled. All programs feature the
automatic adjustment and configuration of the output channels and their output signals, including
the limiting the signal supplied to the speakers.
There are 5 basic program settings:
4 single channels
2 channel / 2 way
2 channel with mono subwoofer
2 channel mono bridged high power subwoofer
1 channel 3 way
All KS Audio products have balanced inputs and outputs.
In the F MOD digital controller card, all of the signal processing is entirely done in the digital
domain. The digital connection is AES 3. High-end 24/27 bit Sigma-Delta A/D converters are gain
stacked along with a 64 times over sampling and a A-rated signal to noise ratio of >110dB to
handle the A/D function. The TA 4D accepts analog input sources as well.
The digital signals are processed by a floating point DSP. This DSP converts the 24 bit wide
integrated data files in a flow word of 32 bit mantissa to an 8 bit exponent, equaling a theoretical
dynamic range of 1500 dB. Overloads, scale noise, and rounding noise are impossible at this
resolution. The parameters available for adjustment, such as Delay and Room Equalization, have
direct access to the floating point of the digital signal processing which eliminates mistakes in
scaling.
2.1.2 Equalization
The most important function of the controller is to assure a flat frequency response and positive
phase relationship. In the course of preparing those programs every sound configuration had to
undergo numerous test runs in order to take measurements to evaluate and to determine the
many different conditions and solutions possible. This results in the best programs with optimal
results for each driver. KS Audio developed a FIR® (Finite Impulse Response) technology to create
the inverse frequency response and operate this via an onboard DSP engine comparing input
signals against programs pertinent to the cabinet and it's components, in order to execute a
complex digital filtering process. This results in the optimal equalizations for each driver/box and
system.
Additional to all this, the sound engineer is free to adjust the sound for a certain application and
venue by adjusting the program parameters such as “Shelving” and “Low Cut” filters. Please check
the program parameters for full details.
