AUDAC SX408A, User Manual & Installation Manual

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Introduction 

This section briefly describes the possibilities of  the SX408A active subwoofer system. 

he SX408A is an active powerful tandem ported 150W subwoofer with a special 
constructed 8" driver that is capable of producing an incredibly powerful and clear 
bass sound. It’s frequency response is as low as 37 Hz at -10 dB, and the frequency 
characteristic is very flat from 37 Hz to 120 Hz. This way, the sound coming from  

 this piece of equipment is absolutely magnificent. 

It contains an integrated class H amplifier, which ensures a high efficiency level with very low 
distortion. This amplifier delivers an output power of 100 Watt to the subwoofer. Besides 
this, it also contains an active crossover network with a frequency of 120 Hz, and two output 
channels for powering satellite loudspeakers. 
 

The two amplified satellite outputs deliver a maximum power of 2 x 100 Watt at 8 Ohm or 2 
x 160 Watt at 4 Ohm. The minimum load is 4 Ohm. 
 
For protection reasons, a built-in limiter is provided to limit the input signal when necessary. 
This limiter consists of three separate stages, one for every channel. This ensures the best 

sound quality with the least distortion for optimal performance. Power, Signal and Clip 
LED’s monitor the proper working of the integrated amplifier. 
 
Besides the high efficiency of the class H amplifier, the SX408A also contains an automatic 
power on/off circuit to ensure the highest energy-efficiency. The volume of the Sub and 
satellite channels is individually controllable at the back of the subwoofer with two 

potentiometers, and the general volume can be controlled by an external volume control or 
wall panel, by connecting it to the built-in RJ45 connector. 
 
This all makes the SX408A a simple but complete solution for a wide variation of fixed audio 
installations. The balanced input connections are just as the satellite speaker output 

connections made with euro block terminal connectors. There is the possibility to connect 
two satellite speakers with an impedance of 8 Ohm on each channel. 

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