Which was devloped first Dynacomp or Ross compressor?

[GM1]

Been doing research on compressors and I am a bit confused. I can't get a clear understanding of which was introduced back in the 70's first - the Ross or the Dynacomp.

Seems like the Ross was the first pedal compressor however I have read where the Ross folks borrowed settings from the Dynacomp - so I'm a bit confused.

Also I have the Wampler Ego Compressor just for my own understanding suspect it is based on the Ross style circuit?

Thanks

 

[analogmike]

Ross normally copied MXR pedals with slight improvements, and that's exactly what the Ross compressor is. See my compROSSor page for more info on the differences.