In this video, composer and producer Alberto Rizzo Schettino visits EVE Audio headquarters in Berlin to talk to Roland Stenz, founder, CEO and designer of EVE’s speaker range, about their approach to tweeter design and how the company has further developed the Air Motion Transformer technology .

Following on from his review of the SC2070 studio monitors back in February, Alberto wanted to find out more about their design and in particular EVE Audio’s approach to the tweeter design. The SC2070 includes a newly designed Air Motion Transformer RS7 tweeter which is 1.5 larger than the version found in the previous generation SC207 model.

In the video, Roland explains how the diaphragm is constructed, manufactured entirely by hand, and how the material and build of the Air Motion Transformer helps to reduce distortion in the higher frequencies. This is aided by the fact that having a tweeter which is larger means that a lower crossover frequency is possible. The SC207 crosses over at 1.8kHz, meaning that some of the issues and inherent distortions associated with higher crossover frequencies are greatly reduced, again resulting in a much cleaner sound.

Roland goes on to discuss some of the challenges he faced when designing another speaker in EVE Audio’s range, the SC203. Being a very compact design at just 190mm tall, the challenge with this model was to design a suitable Air Motion Transformer tweeter which would be suitable for use in the small cabinet while providing all of the benefits that the technology provides on EVE’s larger models while working cohesively with the SC203’s diminutive 3” woofer.

Also shown and discussed in the video is the 4-way SC4070. Featuring two 6.5” woofers along with a midrange driver and AMT tweeter, the central section housing the mid and tweeter drivers can be rotated to allow for horizontal or vertical mounting. The SC4070, along with all of EVE Audio monitors, features high resolution DSP electronics. Alberto and Roland discuss the technicalities of how this works and the inclusion of very high quality A/D conversion.

For comparison purposes, Roland also discusses the largest speaker in EVE’s range, the SC3012. With a much larger 12” woofer along with a 5” midrange driver and AMT tweeter, the design objectives and considerations for this model were quite different to the smaller speakers in the range. Incorporating the largest Air Motion Transformer, in designing the SC3012, Roland was able to maintain a low crossover frequency in this model too, again achieving incredibly low distortion.

Other topics discussed in this 30 minute video include the use of energy efficient Class D amplification, how EVE Audio consider and approach loudspeaker directivity and the fact that the SC2070 makes a great monitor for immersive audio such as Dolby Atmos where height channels are required.

Roland’s passion for speaker design is evident and this comes across well, along with his meticulous approach throughout the various production stages from concept through design, manufacturing, testing and re-testing until the final quality is achieved. Check out the video to hear the fascinating discussion.

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