had 2 of those little compressors and custom patchcables made at Redco U.S. (still have the 4 cables)
the jack to XLR or Jack cable requires Ring/Pin 3 floating when connected to impedance balanced gear iirc.
imo they're great for the money but maybe overrated using the 'supernice' (sidechain ?) enabled.
It's one of few compressors that use 'Feedback' compr. iirc. like the expensive SSL bus compressor unit.
Had the Keeley pro compressor pedal too, with Feedback compr. but that thing was so noisy..
To me that type of compression sounds as ' relaxing the energy, beat etc' somewhat, can be nice.
Also had their PBC-6A compressor, not as clean/subtle, probably more suited for tracking.
my 2 cents, a free Kontelnikov vst can be dialed to do most types/characters of track/bus compression (have their GE edition).