The FBT MODUS SUB meets the following performance criteria: frequency response of 38Hz to 95Hz, sensitivity of 103dB in free field at 1 meter, peak output of 144dB half-space. MODUS SUB is of push-pull band-pass design incorporating 2x15” neodymium woofers with 4” voice coil. The particular acoustic loading and layout of the loudspeakers enable to drastically reduce the distortion and movement of the cone, ensuring high SPL and very high reliability. All components are be mounted in a multi-ply-hardwood enclosure with a resistant black textured finish.