Dual 1-inch Linear Magnetic DriveTM "Twoofers" more likely found in large expensive hi-fi speakers for remarkable clarity and range.

ENGADGET: Soundmatters unveils foxLv2 aptX Bluetooth speaker with $199 price tag

MRI, which stands for Magnetic Resonance Imaging, is a radiology technique which uses magnetism, radio waves, and a computer to produce a range of images of the body.

BBC: MRI scanner