The JDX is a unique device that captures the sound of the guitar amp head and the back electromagnetic impulse form the loudspeaker via a reactive load. The signal is then processed via a series of filters to replicate the tone of a 4x12 half-stack. This produces a realistic rendering that approaches the sound of mic’ing a cabinet with a Shure SM57 while eliminating discrepancies such as mic placement, room acoustics and bleed from other instruments. Features include variable low pass filter, choice of 100 or 300 watt power range and a special guitar mode that enables the JDX to be used instead of an amplifier for ‘quiet late night’ recording.