Power Acoustik Vertigo car amplifiers are the next step in performance and value. Taking advantage of the improved efficiency Class D monoblock platforms, Vertigo amplifiers continue down the road of reliability and longevity you know well. This Vertigo Series 4,000 Watt Monoblock Class D Amp is ideal for adding 1 or more standalone subwoofers. Included with this 1 channel car amplifier is a remote gain control module for mounting on the dash.