A major theme was the reduction of unwanted self noise which coincidentally was the subject of a feature on loudspeaker Signal to Noise Ratio in the July-Sept 2016 issue of HIFICRITIC. This noise is generated by loudspeakers as they are operating and impairs dynamic range, clouds clarity, reduces image depth and may also add false colour to instrumental timbres.
With advanced computer modelling, the new loudspeaker design benefits from improved drivers with flatter frequency responses and lower distortion, both these important components of the noise reducing equation while the largest contributor remains the vibrating enclosure with its relatively huge surface area available for emitting noise, this necessarily coupled to the energised driver chassis.
Matching the noise reduction for the enclosure, distortion from the drivers, particularly the bass-mid, has been reduced by an order of magnitude thus lowering this correlated noise contribution. Also a truly heroic air core inductor was chosen for the bass section of the crossover to remove possible distortion from this necessary component. The integral, open structure floor coupling frame, is also engineered for low noise radiation and for good floor coupling for the enclosure, while the interior has special tuned pipe acoustic mode absorbers plus a central terminating stuffing of Unicorn hair, actually a trade name for a super fine filament, adding damping without excess thermal mass which could slow rhythms. Even the input terminal and treble level adjustment panels were painstakingly analysed, and here the original metal plates are replaced with an acrylic laminate with reduced coloration.