Quasi ribbon driverThe quasi ribbon driver is a variation on the original true ribbon design. The true ribbon, as shown below, is a very simple device. The ultra-thin aluminum foil carries the current from the amplifier and is also the means of moving the air to create sound. No voice coil. No cone. No surround. No box. Nothing except the ribbon.The quasi ribbon is ANY variation from the original true ribbon---and there are many. The Magneplanar quasi ribbon is simply a true ribbon on a mylar film. This design is very rugged and cost-effective with very wide bandwidth.Both the Magneplanar true ribbon and quasi ribbon drivers eliminate the need for a transformer---nothing between the amplifier to degrade the sound. Ribbon drivers are non-reactive and act like a simple resistor to the amplifier. While Magneplanars do require an amplifier with the ability to drive a 4 ohm load, the non-reactive load will allow an amplifier to perform at its best.