Completely redesigned and re-engineered for today's modern vehicles, our new OE Serie was designed to upgrade factory systems to deliver the musical performance you demand. The OE Series OE-690D was developed to replace old and worn-out paper cone woofers in many late-model vehicles providing you with tight accurate bass response in a much longer-lasting form that is offered from the factory. Utilizing a dual voice coil design, the OE-690D can accommodate a 20 or 89 impedance needed by the OEM amplifier. This variable impedance will make more efficient use of your amplifier's power and allow for fitment into more applications. To handle this power we include upgraded features like the custom tooled stamped baskets, our newly Injected PP/Carbon Fiber Cones to produce the best in distortion-free sound reproduction, Butyl Rubber Surrounds for high efficiency, increased bass response, and long life, and larger motor structures to handle the increased power. *NOT DESIGNED FOR USE WITH AFTERMARKET HEAD UNITS AND AMPLIFIERS*