The Class D series from Power Acoustik is made for bass! The A1000DB breaks all the cost-to-power boundaries with its cutting-edge class D design and insane power capabilities. A built-in low pass crossover with variable frequency control eliminates the need for an external crossover and makes the A1000DB ideal for driving your subwoofers with clean Power Acoustik power. Other features include variable subsonic filter to help protect your subs, 0-180 degree phase control for tight, accurate bass, 2-ohm stability, and gold-plated terminal-block connectors.