Diode bridge compressor

Three Carnhill transformers in the audio path,
Same output stage as in the MP573 preamp,
Variable attack time,
Additional ratio of 12:1 makes a limiter,
Side chain EQ with 3 high-pass frequencies,
External side chain input,
All stepped controls,
Analog gain reduction meter,
High grade electronic components throughout,
High grade four layers PCB,
Available assembled or as a full kit (everything included).

https://www.soundskulptor.com/en/proddetail.php?prod=CP554