The X-Series amplifier X-A90M is the perfect amplifier for the job. Along with the 900W power matched specifications of both components, each were built under the same sound philosophy, Alpine ID. With a focus on musicality and sound imaging, the X-W12D4 / X-W10D4 is complimented by the amplifier's clean, low distortion output and >1500 damping factor. Add the X-Series speakers to the system and prepare to experience a new level of in-car imaging.