531
Optical De-esser
Based on the Dane Optical De-esser #31, the XQP 531 uses a pair of VACTROL® optoisolators to achieve smooth reduction of sibilance.
The filter in the sidechain is a high-pass design, switchable to three cutoff frequencies. A HPF, rather than a band-pass, allows any
sibilant above the chosen frequency to be reduced.
It is our intention to build a smooth, simple, musical device instead of one that is fiddly to operate and difficult to achieve a good sound.

The XQP 531 Optical De-esser is
VPR Alliance approved.