The Peavey Session 500 is desirable to steel, jazz, country and even rock guitarists who want almost infinite sustain effects with tremendous tonal control, power output capability, and dynamic range. It features a unique "state variable" midrange equalizer that enables both boost and cut, as well as shifting the center point of the midrange equalizer. The Session 500 also includes a variable electronic crossover into the processing circuitry to allow bi-amping the system through auxiliary power amps/speaker systems.