This technology significantly lowers middle frequency noise - about 100 to 500 hertz. When combined with the floorboard insulators, there's a 1.3 dB reduction in interior noise. Other standard features on the base RL include 18-inch wheels, Bluetooth, a Bose 10-speaker stereo, dual-zone climate control, a power moonroof, and an infotainment display. Options include the Technology and Advance Packages. It seems that Acura has just about reached the end of the line with their supposed flagship.