The Magnepan MG2.7i is a pair of 3-way, full-range planar magnetic loudspeakers. Both the bass and midrange drivers feature aluminum foil "quasi-ribbon" conductors bonded to a Mylar diaphragm, which is subtly visible through the front grille cloth. In contrast, the True Ribbon Tweeter uses a free-floating aluminum foil strip suspended without a substrate. Sound is generated when an AC signal flows through these aluminum conductors, causing them to react with surrounding magnet arrays positioned behind the Mylar for the low/mid frequencies and along the sides of the ribbon tweeter. This electromagnetic movement vibrates the components, projecting audio in a dual-directional dipole pattern forward and backward.