the fat lady components The heart and soul of a loudspeaker are the components within it. These produce the sound, which is why it pays to select the finest available. Most speaker companies purchase drive units from specialist manufacturers for their designs, and this often produces excellent results. Morel, however, designed, developed and fine tuned the drive units specifically for the fat lady. The difference in approach can be likened to buying a first class suit from a menswear store or having a bespoke suit made-to-measure in London's Saville Row.