The amplification system for both speakers is mounted in one unit, so only one speaker needs a power connection. Connect the second cabinet using the plug-in speaker cable (included.) The volume knob is conveniently located on the front panel for easy access. High-density materials are used to increase efficiency, and bass porting improves the low-end response. Concave oval waveguides provide a wide listening area “sweet-spot” for accurate imaging and fatigue-free listening. Radial-edge speaker baffles minimize audio distortion.