Follow-up: I re-configured my board (post #14) removing the Fdeck HPF from the signal path and reassigned to the Empress's sidechain insert using a dedicated insert cable = 1/4" TRS > gray (send / tip) 1/4" > red (ring / return) 1/4". In essence, the Empress sends a "duplicate" signal through the insert loop to the device of choice...in this case, the HPF...which alters the compression trigger. It is independent of the of the signal path. To emphasize the affect, I goosed the Empress to 10:1 and played my fairly hot Sadowsky-harnessed PJ5 while rotating the HPF threshold from 35 to 140 hz. The results were subtle thru the cans but I did see a drop of -8 to -4 dB on the Empress which may be beneficial given your issues. The bad news is the application requires a dedicated outboard signal processor.
Personally, I would find another route to tame the low end. I can't speak with any authority as I'm not familiar with your rig / set-up. For all I know, you can be boosting something upstream (...like the Warwick) which is causing concerns further down the chain. If overdriving the compressor...and the Empress is fairly forgiving...I would add some EQ before the compressor (HPF - my preference, EQ pedal, whatever) to attenuate the lows and scrap the Empress sidechain altogether. If you were to add the HPF as I just described, it would actually be in the true signal path and that's a good thing.
Riis
Personally, I would find another route to tame the low end. I can't speak with any authority as I'm not familiar with your rig / set-up. For all I know, you can be boosting something upstream (...like the Warwick) which is causing concerns further down the chain. If overdriving the compressor...and the Empress is fairly forgiving...I would add some EQ before the compressor (HPF - my preference, EQ pedal, whatever) to attenuate the lows and scrap the Empress sidechain altogether. If you were to add the HPF as I just described, it would actually be in the true signal path and that's a good thing.
Riis