Dynamic sound performance. The QD25 delivers vibrant sound, featuring a 2.5" mid-bass driver with neodymium magnets, a 0.75" silk dome tweeter with neodymium magnets, and an oval passive radiator. Powered by a high-efficiency Class-D amplifier, it delivers 25W RMS of dynamic sound with punchy bass. | Edifier | | QD25 Portable Bluetooth Speaker | Black | Best Buy