Alpine X-A90M Mono 1800W Class DAlpine introduces the all new X Series of high grade speakers and amplifiers. These products have been engineered and tuned to create a perfect match for extraordinarily dynamic, realistic sound reproduction and a spatial sound impression. The all new X Series amplifiers set a new standard for sound quality performance and power output in a very compact design. Available in mono, four channel, and five channel configuration, these amps are a perfect