User Manual
RackPack: DynaMaxx
7
Part of the SPL RackPack modular system series, the DynaMaxx proba-
bly is the most consequent interpretation of a „set & forget“ compres-
sor concept. In keeping with the SPL design philosophy, it incorporates 
many features not found on standard compressors, and a unique con-
trol system makes is surprisingly easy to use. 
The DynaMaxx also offers a de-compression mode which may be used 
to counter the effects of overcompression in previously processed 
source material. 
Why is DynaMaxx so different? Though auto attack and release func-
tions are nothing new, in the DynaMaxx design, the time constants are 
automated  in  a  very  musical  way.  DynaMaxx optimizes  all  time  con-
stants in real time during processing so that the compression charac-
teristics are continually matched to the source material. 
The DynaMaxx circuitry actually uses two of the excellent THAT 2181 
VCAs  in  SPL’s Double  VCA-Drive  mode  configuration,  which  doubles 
the operating  range  while  increasing  transparency  and  reducing dis-
tortion.  Another  benefit  of  the  DynaMaxx  circuitry  is  that  high  com-
pression ratios do not affect high frequency detail – high amplitude, 
low-end bass can be controlled without introducing pumping or other 
negative  side-effects.  Similarly,  complex  stereo  sources  can  be  pro-
cessed easily and very musically. 
The DynaMaxx has numerous applications in recording and mixing, as 
well as for live applications, and because of the level of intelligent pro-
cessing within the unit, there are only two controls to adjust per chan-
nel, making operation very intuitive.
Introduction










