- Highly Oriented Polyolefine - A proprietary Sony speaker cone material which combines high strength, low weight, and low resonance resulting in improved transient response, higher power handling, and flatter frequency response.- Foam Infused Surround - A foam-based material is permeated into the surround material for greater compliance and better durability.- 1 3/4" Mounting Depth - Fits in a greater variety of existing factory speaker locations without the need for any modifications to the mounting location.- Low Profile - Allows the speaker to be used in a variety of applications, especially where the factory installed speaker grill is close to the mounting surface, and where there is limited mounting depth.