Zeppelin Wireless technical paper Introduction Zeppelin Wireless is the best one-piece audio system available. It retains the iconic design of the original, but delivers dramatically improved compatibility, enhanced functionality and quite simply the best audio ever heard from a wireless music system. A great level of understanding and discipline of Finite Element Analysis (FAE) driven by our core product range has opened our eyes for improvement and allowed us to apply a new set of rules. Tweeter Two 25mm Double dome tweeters feature a thin aluminum dome for lightness, surrounded by a thicker aluminum ring for rigidity. The same tweeter technology has been used in our award-winning CM Series of Hi-Fi loudspeakers. The result is pure and precise treble reproduction. Midrange Zeppelin Wireless is Bowers & Wilkins first wireless speaker to use our signature “Fixed Suspension Transducer” (FST) driver technology as found on the flagship 800 Series Diamond. FST’s innovative surroundless suspension allows for the edge of the speaker cone to terminate without any resonance. These drive units deliver clean, intelligible midrange performance. An anti-resonance dust cap is fitted to the voice coil bobbin, and has been tuned to reduce the voice coil resonances. The result is a smoother midrange response. Subwoofer Zeppelin Wireless has adopted a larger 6 inch sub woofer. A large magnet system with an ultra long-throw voice coil allows for even the deepest bass to be played at impressive volume. Finite Element Analysis (FAE) has been applied to many of the subwoofer components. The shape and material choice for the suspension has been modeled and designed to ensure total linearity, and the cone has been modeled to ensure a break up frequency way above the operating band. The motor system resonance has been raised to 500hz, the result is no ringing in the audible band. Even down to the alignment of speaker basket chassis legs and screw hole locations, the subwoofer has been designed to ensure minimal vibration and coloration. Enclosure The enclosure of Zeppelin Wireless measures as if it was a sealed box. This helps to improve interaction with the room and give everyone a similar listening experience no matter what your room is like. A small number of tiny tuned vents have been included to help relieve internal pressure that restricts drive unit movement. The result is sound that is freer, with tight precisely controlled bass. The enclosure has been fabricated from 30 percent glass fibre reinforced ABS. The wall thickness is 50 percent thicker than previous generation Zeppelins; this along with optimised bracing helps to control and reduce cabinet resonances so the sound reproduction is free from coloration. Amplifiers Zeppelin Wireless is a fully active 2.1 design. All five drive units are individually driven by dedicated bespoke audiophile class D amplifiers. The 4x25 Watts plus 1x50 Watts output powers the improved drive units for increased precision, seamless integration and impressive levels of bass attack. Digital Signal Processing For many compact speakers, when played at high volume levels, the sound becomes unlistenable and incoherent. Zeppelin Wireless takes a clever approach by applying propriety Digital Signal Processing. Zeppelin Wireless monitors and analyses the audio signal at every sample and intelligently optimises the system to ensure controlled bass output and room filling sound at all listening levels. The DSP in Zeppelin Wireless is twice as powerful as Zeppelin Air. This allows for a more accurate processing. Audiophile DAC In the digital world, the Digital to Analogue Converters (DACs) are vital for getting the best from high-quality drive units. On Zeppelin Wireless all inputs are up-sampled through the audiophile-quality 192kHz/24bit DAC. This has the effect of reducing noise and increasing dynamic range, creating a more detailed, natural sound.