The 541 Optical Compressor is a feedback style compressor, designed for smooth, unobtrusive gain reduction. Unlike its XQP siblings, the 541 utilizes Silonex optocouplers for gain reduction and subtractive metering.
The 541's control set is be minimal, including a ten-segment LED gain reduction meter, a threshold control operating in the dbx-style counter-clockwise direction with a very arbitrary orientation, and makeup gain.
There is also a very big yellow lighted IN switch, which we anticipate will cause sales to skyrocket. They haven't yet, but the engines have started at least.