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. Model C4 Power 400 WATTS RMS Speaker 4×5″ 8Ω 30Hz-15KHz Dimensions 14.2 x 12.4 x 13.4 inch360 x 320 x 340 mm(W x D x H) Weight 29lbs / 13.1 kg Color Black, Red