Although compression can be used as an obvious effect, it's more likely to be used as a subtle tool. One of the reasons guitarists may be wary of compressors is that what they do isn't always that ...

Universal Audio UAFX Max Preamp & Dual Compressor: What is it? Does any effect confuse, delight and bemuse guitarists like compressor pedals? For some a good compression box can be an always-on effect ...