In typical Crest Audio fashion, the CPX series is over-built and over-engineered. Especially considering their highly competitive prices. Built-in subwoofer crossovers, low-cut filters to prevent woofer cone flutter, fan cooling, Speakon output connectors are all included.

When a signal has waveform peaks that exceed the amps' power-supply rails, waveforms get chopped off, or clipped. This undesirable distortion most often happens when the amp is turned up too high (too much gain). GCL senses clipping (or current limiting) and dynamically reduces the gain for a few milliseconds. You can drive the CPX amp to its maximum (and beyond) without hearing audible distortion.