The CL 1B is a plugin emulation of a hardware equivalent by the same name, designed in conjunction with its makers Tube-Tech, and said to meet their exact standards. It's a fantastic, CPU-friendly plugin that's capable of both subtle containment and excellent audible colour.
Among the CL 1B's notable details are a simple external sidechain selector that can be run in mono or stereo, realistic controls and three attack/release presets - of which 'fixed' mode is especially handy for dialling in useable compression.
The CL 1B is adept at both subtle and audible compression, with attack and release characteristics. We tried the plugin on on a number of sounds, including acoustic guitar, drums, piano, vocals and bass, and they all benefited in one way or another.
Overall, the CL 1B really is a fantastic compressor plug-in that's capable of both subtle containment and excellent audible colour. It doesn't come cheap, but when you consider that it weighs in at a fraction of the cost of a hardware CL 1B, the price becomes easier to swallow.4 Stars