PJB’s huge emphasis on research and development ensures that no other cabinets sound like a PJB cabinet.  Phil Jones Bass cabinets are precisely tuned using multiple loudspeaker analysis programs to reduce cone movement at the lowest frequencies, and to increase low frequency output. PJB employs a full size anechoic chamber for acoustic measurements and a laser scanning Doppler interferometer to analyze cone movement in 3D across the whole audio spectrum.