The Kemo range of programmable filter modules are manufactured using modified parts from the 1200 Series, stocks of 1600W modules reflect the types held for the 1200 series.
With digitally settable cutoff frequency over a 1792:1 span, this is the finest board-mounting active filter solution available today. Lowpass, and highpass,  responses suitable for anti-aliasing and general purpose filtering held in stock. Wide dynamic range, low distortion and noise (true 16bit performance can be achieved with many models). Small size: eight pole models provide industrial-strength filtering in a 50 x 50 x 15mm (2"x2"x0.6") metal box.
Extended cutoff frequency span of 1792:1 instead of 255:1. Pin-compatible with 1600 in most applications. 
Available in the standard filter responses.
Fits all Kemo carrier cards, including 6UG/1600
1600W modules give an extended range of cutoff frequencies, from 255 for the standard 1600 filter modules, to 100 steps over a 1792 range for the 1600W.
Typical frequency ranges are 10 Hz to 17 920 Hz and 20 Hz to 35 840 Hz. Ideal for sound and vibration applications.  

Figure shows comparison between 1600 series 255 steps and 1600W series 100 steps in 1:1792 range.

For more detailed circuit information, and data to enable you to fit 1600W series filter modules to your products use the link here.