Two months ago, at the audio expo in Tampa, I stumbled upon a pair of most intriguing French speakers. The $8000/pair Diptyque 107 is a medium-sized planar magnetic whose designers, Gilles Douziech and Eric Poix, make no secret of their love for Magnepan. All the same, the duo has sought to improve on that company's famed panel technology, mostly by addressing a perennial shortcoming of such dipoles: their lack of deep bass.