Fluid Audio FX50 Coaxial Bi-Amps Studio Monitor (Single) - 5"Keeping true to the original keyhole design, the FX enclosure has been updated with a complex radius front baffle, which not only looks pretty cool, it improves cabinet defraction. Coaxial driverMounted in the center of the woofer is a 25mm silk dome tweeter in a coaxial configuration. Using this technology (unique in its price range) makes it a point source device, meaning that all the sound emanates from a single point not points that are 10 apart.