The ultra-compact, 12" Tall Aon 2 Bookshelf Monitor (on right in the photo to right) incorporates a 6", High-Definition, Multi-Vaned Phase Plug (MVPP™), cast-basket Mid-Bass Driver, coupled to two 6-1/2" Inertially-balanced side-mounted Low Frequency Radiators and the GoldenEar High-Velocity Folded Ribbon Tweeter (HVFR™).