Amplifiers

KS Audio – CA 4D

The CA 4D is a 4 channel MOSFET amplifier with controller card system configuration technology, using digital controller cards D MOD or F MOD. Both exclusively supporting the KS AUDIO FIRTEC™ finite impulse response technology. When changing controller cards or when loading a new program from the internal memory both the inputs and the outputs are appropriately configured to reflect the correct set up.

Whether or not the system is configured as 4 single channels – 2 channel / 2 way – 2 channel with mono Sub woofer – 2 channel mono bridged high power sub woofer – 1 channel 3 way – L and R SAT configuration, nearly every combination of KS AUDIO speaker systems is possible. This allows for a wide field of application, from small and medium size concert sound reinforcement to speech reproducing at the highest quality.

The CA 4D is equipped with 4 independent analog FET power amp modules. Two of them deliver a continuous sinewave power of 700 watts into 4 ohms each. While the other two modules deliver half that power. The controller card and an applicable program determines the distribution of power to always deliver the maximum available. The high performance of the CA 4D amplifier is achieved by three balanced supply voltages. The power losses are substantially less than with any other conventional analog power-amplifier designs. A total of 40 quality selected power MOSFET transistors, deliver a maximum headroom. Soft clipping circuits working in conjunction with

the operating voltage, limit the NF signals and therefore enable the power amps to always work with a high damping factor as well as remaining fully regulated.

The power supply is a state-of-the-art, heavy duty wide-range switch mode design, with Power-Factor-Correction (PFC) built in. The start-up current is limited to assure maximum protection. A second power supply is used to independently supply the controller card electronics along with the low voltage cooling fans and to operate the stand-by switch. Excess temperature is dissipated by 2 fans. The air is taken in from the front panel inlet thru an easy to clean filter. It is passed through to the back panel outlet, while passing over the heat fins and the power transformer to cool these units down to nominal operating temperatures.

On the front panel there are 4 mute switches corresponding to the 4 channels of the amplifier. Each of these switches has a red LED below it to indicate the mute status. On the rear panel there are 4 Neutrik speakON output connectors. Their status is indicated by 4 green LEDs. The mains cable is connected via a PowerCon.

The housing is constructed of 1.5mm thick steel while the 19′′ front plate is constructed of 4mm thick anodized aluminum and has 2 handles for ease of use.