If you have used st/st terminated (also known as AT&T terminated)  you probably believe that glass fiber cables have been unmusical, weak in bass, restricted in dimension, harmonically incomplete, that they are bright, dry and, missing natural musical textures, congratulations ! You are most definitely correct.  Historically these have been notable complaints by users of fiber optic digital cables with systems capable of very high resolution of the digital source.  Aural Symphonics Optimism series is a product that sets a new standard for performance. 

Aural Symphonics Optimism v2.2006 changes everything you thought optical cables could not audibly satisfy. Optimism v2.2006 defies boundaries previously set by the best audibly performing electrical wire digital cables and proclaims an ultimate statement of achievement in optical digital data transmission, delivering performance levels unsurpassed by present day designs.

Extended research into light diffusion characteristics of optical fiber and the resulting audible effects on performance created a set of variables that resulted in the selection of the specialized cladding material to wrap the glass fiber. Attached to the optical fiber assembly is a proprietary performance mechanism designed exclusively for the Aural Symphonics Optimism v2.2006 A unique device that we call a synthetic aperture module. This device optically tunes the laser light to a specified performance parameter. Within the strict parameters of this design, the 2.xx meter length is the only length adaptable to the performance goals.

Optimism v2.2006 is treated like an expensive and fine gemstone that is critically assessed for optical inclusions, uniformity with polishing to an exacting art.  This perfectionist view toward quality control yields products of superior purpose.