COMPLETE SOUND SYSTEM Pack. System with great low frequency extension. The combination of two L3 115 FA mid/treble units and two L Sub 1800 A subwoofers offer a high level of sound pressure across the entire frequency range, which can be adjusted with the established presets (Bass Boost, Flat (LF), Flat (HMF) and Contour). System composed of: 2 x L3 115 FA, 2 x L Sub 1800 A, 2 x K&M M20 aluminum mast, 2 x L3 115 FA cover and 2 x L Sub 1800 A cover.