Especially its elliptical lowcut filter mode does very suprising things in the bass frequencies below 50hz and is unique to this EQ. Culprit: only available for UAD dsp cards. Then again i recommend purchasing a UAD anyway – you can run dozens of Cambridge EQs without ever putting your cpu in trouble.
A native alternative is Sonnox Oxford EQ. It’s got similar features and same ease of use. Then again it is missing the awesome elliptical filtermode. I didn’t yet find a free equalizer that satisfied my needs as much as above ones, eventhough it is often said that most EQs are basicly the same in terms of algorhythm. Of course i didn’t look for anything else in a while, thus suggestions are welcome.