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AMPLIFIERS

CA 4D

2X 700Wrms + 2x 350Wrms Analog FET Power Amplifier

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SpecificationsCA 4D
Frequency range5Hz-50.000Hz (without controller)
Continuous sine wave power700Wrms / 4 ohms Channel 1+3
350Wrms / 4 ohms Channel 2+4
Peak powerAll channels driven, pink noise 12dB crest factor:
9100W at 2 ohms
AmplifierMosfet, triple supply voltage
ControllerSlot for KS D MOD 2 or F MOD DSP module
Output connectors4x SPEAKON NL 4 with automated mode switch
* 1-4 as 4 channels Full-range-mode
* 1+2 and 3+4 as 2 channels Bridge-mode
* 1+4 and 2+4 as 2 channels Bi-amp-mode
* 1+2 as 1 channel Bridge Sub, 3 as Mid-range and 4 as High-range, Tri-amp-mode
* 1+2 as 1 channel Bridge Mono Sub and 3 and 4 as L + R Full-range, Satellite-mode
Input connectors4x XLR3F thru 4x XLR3M Symm. balanced analog or AES/EBU3 automated mode switch
On D MOD 2 or F MOD also Ethernet for DANTE network (optional)
Mains100-240VAC
Weight9KG
Size (h/w/d)19"/2U/350mm
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The CA4D is a 4 channel MOSFET amplifier with control card system configuration technology using an analog controller card or the digital controller card exclusively supporting the KS Audio FIRTEC finite impulse response technology. The digital card is called FIRMOD 2. When changing controller cards or when downloading a new program / configuration from a chip card or a computer both the inputs and the outputs are appropriately configured to reflect the correct set up.

There are 5 basic program settings: - 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.   Whether or not the system is configured as a 2 in / 2 out or 2 way active or high-power bass bridge or additional activated cross over or bi-amping, etc... nearly every configuration is possible. This allows for a wide field of application from large concert-size sound reinforcement to speech producing the highest quality. The power supply is a PowerCon connector cable with a wide range switch mode power supply with power factor correction operating between 100 VAC and 250 VAC 50/60Hz.

On the rear panel of the amplifier there is an input socket for a remote stand-by that is switch-operated. It operates between 5 and 24 V. There are 4 mute switches corresponding to the 4 channels on the amplifier, each of these switches has 1 red LED below it to indicate the mute status and if the light is on the channel is muted. This feature is useful in many ways, such as when using this amplifier with monitors, you can mute individual mixes when they are not needed or, when you are tracking down problems.

The CA4D is equipped with 4 independent analog FET power amp modules. two modules supply a continuous 700 watts into 4 ohms each. And the other two modules supply a continuous 350 watts into 4 ohms each. The controller card and an applicable program determines the distribution of power to always deliver the maximum power available.

The high performance of the CA4D amplifier is achieved by 3 independent balanced power voltage modules. The power losses are substantially less than with any other conventional power amplifier designs. A total of 72 quality selected power transistors, each featuring a P/V/max=250watts deliver a maximum headroom. Soft clipping circuits working in conjunction with the operating voltage, limit the NF signals before each power amp, which enables the power amp 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 voltage is limited to assure maximum protection. A second wide range heavy duty switch mode power supply including PFC is used to independently supply the controller card electronics along with the low voltage cooling fans and, to operate the stand-by operation via the remote standby switch. In the production of high output, high levels of heat are also generated as a by-product at the amplifier, which could damage the semi conductors. The reduction of these high temperatures is done with the installation of 2 independent cooling fans, thermostatically controlled. The air is taken in from the front panel inlet of the power amplifier thru an easy to clean filter and passed through to the back panel outlet while passing over the heat fins and the power transformer to actively cool these units down to nominal expected operating temperatures.

There are 4 Neutrik Speakon output connectors. These outputs are configured automatically by the controller card selected for the system. There are 8 balanced XLRs and are alternatively input or output, both for analog or digital AES/EBU signals.

The chassis is constructed of 1.5mm thick steel with rear mounting points available for extra security, and the face plate is constructed of 5mm thick aluminum and has 2 handles for ease of use.

"Analog FET Power Amplifier"

Special about the KS CA 4U and TA 4U amplifiers is the combination of an SMPS power supply and the analog MOSFET amplifier modules. Because of this, these amplifiers are not only light but they are by far the best sounding amplifiers in the industry.

TA 4D

4x 1000Wrms Analog FET Power Amplifier

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SpecificationsTA 4D
Frequency range5Hz-50.000Hz (without controller)
Continuous sine wave power1000Wrms / 4 ohms all 4 chanels
Peak powerAll channels driven, pink noise 12dB crest factor:
16000W at 2 ohms
AmplifierMosfet, triple supply voltage
ControllerSlot for KS D MOD 2 or F MOD DSP module
Output connectors4x SPEAKON NL 4 with automated mode switch
* 1-4 as 4 channels Full-range-mode
* 1+2 and 3+4 as 2 channels Bridge-mode
* 1+4 and 2+4 as 2 channels Bi-amp-mode
* 1+2 as 1 channel Bridge Sub, 3 as Mid-range and 4 as High-range, Tri-amp-mode
* 1+2 as 1 channel Bridge Mono Sub and 3 and 4 as L + R Full-range, Satellite-mode
Input connectors4x XLR3F thru 4x XLR3M Symm. balanced analog or AES/EBU3 automated mode switch
On D MOD 2 or F MOD also Ethernet for DANTE network (optional)
Mains100-240VAC
Weight14KG
Size (h/w/d)19"/3U/350mm
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KS AUDIO TA 4D is a unique solution for all applications in the field of professional sound reinforcement. From a linear 4-channel power amplifier to a “digital controlled multiway PA system”, any conceivable configuration is available simply by channel-wise program change or exchange of a controller module on the front.

With the newest Controller F MOD, all KS AUDIO systems can be operated with the most modern linear-phase FIRTEC equalization, simply by downloading new programs from the internal memory.

8 balanced XLR connectors and 4 Speakon power outputs are automatically adjusted in their function: the power outputs switch over to “bi-amp” or “bridge” mode when necessary, the XLR’s can be alternately used as input or output, both for analog and AES/EBU signals.

One slot is intended for the optional DANTE card. Thus 8 further audio inputs are available. An Ethernet switch allows simple daisy-chaining.

Of course, TA 4D contains all necessary protective devices in the power output stages. The 4 channels are largely independent of each other, so that e.g. in case of under-impedance on one channel only the respective channel is switched off. The “ready” status is displayed separately. In addition, the three variable cooling fans, fitted with an easy-to-clean air filter on the front, offer a high level of comfort. The amplifier can be remote-controlled with a logic level. A 1.5mm thick sheet steel housing, large handles, a 5mm front panel and, if required, angle brackets on the back underline the sturdiness of this device.


TA 4D delivers 1,000W distortion-free sinus power per channel. This is possible because the MOSFET power stages are supplied with a symmetrical triple operating voltage, which results in a high degree of efficiency and therefore little heat dissipation.


The wide-range switching power supply operates with PFC on almost any alternating voltage. The layout of the power supply has to take into account that sufficient connected load must be provided for each TA 4D. Fuse rating slow-blow.


The maximum output power of all 4 channels is achieved when a “pink noise” signal with a crest value of 12dB is reinforced without “clipping”. Such a test signal is used by most loudspeaker producers to indicate the power capacity.

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TA 2D

2x 2000Wrms Power Amplifier

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SpecificationsTA 2D
Frequency range5Hz-50.000Hz (without controller)
Continuous sine wave power2000Wrms / 4 ohms per channel
Peak powerAll channels driven, pink noise 12dB crest factor:
16000W at 2 ohms
Amplifier48 Mosfets, triple supply voltage
Controller27Bit ADC, AES/EBU SRC, 192kHz, 32Bit DSP
KS FIRTEC™, FIR filtering
Output connectors2x SPEAKON NL 4 
Input connectors2x XLR3F thru 2x XLR3M Symm. balanced analog or 
1x XLR3F 1x XLR3M AES/EBU3 automated mode switch
1 Ethernet for DANTE network (optional) with daisy chain output
Mains100-240VAC
Weight12KG
Size (h/w/d)19"/2U/350mm
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The versatile amplifier with perfect features: from a basic stereo power stage to a digitally controlled 2-way active loudspeaker system with network control and monitoring, any operating mode is possible. 

The TA 2D finds its best application as high-performance amplifier for all KS woofers. For this purpose, the basic program is ideally matched with configurable parameters to the respective loudspeaker type. The same technology of the F MOD controller module has been firmly integrated. Thus the amplifier is on the same software level as F MOD and there is the possibility to update new setups and firmware over USB / Ethernet . Also there´s an integrated DANTE™ Option.

Two independent amplifier channels featuring a highly efficient 3-stage Class-H circuit provide the basic configuration of the TA 2D. Each power output stage comprises 24 fast FET transistors that guarantee superb audio performance with a frequency range of up to 50kHz.

The performance of the 2HE/19” amplifier with its 2x2000W is at the upper limit of the energy level that common 16A protected 230V circuits can supply. Already at 8 ohms there are 1,000W available, which is sufficient power to operate almost any loudspeaker.

The power stages are supported by a digital audio processor with high-quality 27 bit A/D converters using gain stacking technology. This allows the implementation of 2 single channels, a stereo or a 2-way system.

The signal processing programs for all KS full-range loudspeaker systems are equipped with the FIR filter technology FIRTEC™. This means individually measured, phase-pure sound reinforcement systems with an unsurpassed sound resolution.Like the F MOD, all current speaker configurations are integrated and all settings can be saved as presets. If new speakers or firmware are available, a complete update can be downloaded from our website into your controller via USB.

Distortion free Mosfet power

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CA 4D

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TA 4D

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TA 2D

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