jbl synthesis sda 1700JBL Synthesis SDA 1700 Subwoofer amplifier for home theater with a focus on control and integration JBL Synthesis SDA 1700 is a rack mountable Class D subwoofer amplifier developed for dedicated home theaters where you want precise control of the low end. It is designed to work together with JBL Synthesis in wall subwoofers and gives you a solution where both performance and integration have been considered from the start. With options for