The inverted dome tweeter has been a Focal signature since 1981; it offers the property of being a true micro loudspeaker. The curvature of the dome is significantly less pronounced than that of positive domes. This allows for better spatial dispersion and offers very low directivity, unlike ribbon tweeters. The inverted dome tweeter therefore generates unrivaled dynamics, allowing sound engineers to very precisely control the compression dosage. The precision of the image (height, width and depth) is remarkable and makes it easy to position each instrument. In addition, in order to perfect the spatialization and further improve the very low directivity of the inverted dome, a waveguide was developed. In the horizontal plane, the frequency response is within a deviation of +/- 0.5 dB. This performance guarantees an incredibly stable soundstage.