The S series are designed especially for highly demanding touring environment where live sound companies push the threshold of high-power performance vs reliability to its extreme. 
All S Series amplifiers are built around the same core technologies, including Class TD output stage, SMPS regulated switch-mode power supplies, and highly efficient heat dissipation systems.
S series amplifiers have the same signal flow, and the same feature sets.

S 10004 is a 4-channel amplifier that incorporates state-of-the-art voltage regulation technology for more dynamic power. 

The S series is equipped with an advanced protection system, which includes power soft start, DC overload, short circuit, overheating, ultra-high frequency, clipping and in particular no relay output protection that has a rapid response which no relay can match.

Excellent heat dissipation system, S series amplifiers are designed with high efficiency short-range duct double copper ribbon heat sink, to ensure excellent heat dissipation and unmatched performance as compared to aluminium heat sinks.

The input stage of all S series amplifiers have a high sensitivity to provide ample system headroom. 
This in effect means that the input stage is almost impossible to clip.
 Built-in adjustable Voltage Peak Limiter (VPL) sets the maximum output voltage and therefore also the maximum output power. 
The sophisticated output section monitors faults and generates appropriate warnings, which are displayed on the amplifier front panel.
These alerts allow the operator to adjust system settings and thereby avoid failures.

Whether it is touring or fixed installation, S series amplifiers suit the most demanding applications due to its small size, low weight, high efficiency, high power and high reliability.