A quick way to do serial compression, this doofer consists of 3 compressors in serial controlled by 8 macro dials. The controls consist of 4 dials, one each for Threshold, Ratio, Atack and Release. Each dial also has a 'Spread' control which lets you control how that setting varies across each compressor.
For example: If the Spread control for threshold is set to 50% then the threshold setting for each compressor (1 to 3) will be the same. If the Spread control is increased to greater than 50% then the threshold setting for compressor 3 will be higher than compressor 1 and the setting for compressor 2 will be halfway between. If the Spread control is decreased to lower than 50% then the threshold setting for compressor 3 will be lower than compressor 1 and the setting for compressor 2 will be halfway between. This same principle applies to all of the other controls except make-up gain.
Open up the doofer to see the 3 compressors and to adjust the make-up gain on each compressor and therefore the amount of signal fed into each compressor.