The IS-F is an awseome car and it's factory fitted Mark Levinson audio system is quite good....... but it lacks detail and bottom end. That's where we come in. Using some of the most innovative "OEM" integration products available, we've dramatically improved both the sound quality and overall volume in this IS-F while retaining the original 3-way front speaker system. The Mosconi D2-80.6DSP 6-channel DSP amplifier drives the front, while the D2-500.1 mono amplfier runs the Image Dynamics 12" subwoofer and both these amplifiers fit neatly under the front seat. The end result? An audio system that matches such an incredible vehicle!