the real SPL plugins:
While SPL’s hardware has been fascinating audio professionals from home studio owners to mastering engineers in the world’s most famous facilities, there has been a continuing and ever growing demand for digital (DAW) users to be able to enjoy this technology.
Now we are proud to announce that our software design team has transferred the features and performance of our analog processors into the digital domain. Using the latest, most powerful methods available for high-precision modeling of our analog circuit designs, SPL has produced results far beyond pure mathematical approaches.
http://www.soundperformancelab.com/?id=331