Nexo Geo-D: From pub to arena in one jump
The Frankfurt Pro Light and Sound show is the biggest of its type in the world. It's entertainment technology times…? Nobody knows how big that number is, but the long awaited new Nexo system sure pulled numbers and the dollar figures were looking as good as the SPL numbers.
From Pub to Arena in one jump; an act of Geo-D
Wouldn't it be nice to have a PA that had the benefits of a true line array yet could be easily ground stacked, let alone affordable? Imagine a tour where you have to prepare a system to do a large venue pub and club run that terminates in an arena show? How many types of specialist speaker systems would you need to achieve very good sonic results at all shows with only minimum preparation time? Two? Perhaps three?
Maybe you could have two systems leap-frogging and a big line array at the end? Or maybe you could just have one? A true line array that really worked as a ground stack would be the answer and though there are a couple of line arrays that can be chocked or jerry rigged to do the job, compromise has been the word up until now.
The Frankfurt show saw an endless collection of new strings of black boxes caterpillaring their way into Mime Street , but there was one audio caterpillar that did an “ Eiffel Tower in the desert” stand out job. This was the new Geo-D tangential array. This relatively compact and high-output system completes (for the moment), the Nexo Geo range, though there is also a small array economy installation box coming. (the PS12; get ready for this one for all those venues that want 140 dB but don't want to see a box).
The Geo-D has output figures that are up with the world's loudest arena boxes but it is the flexibility of the new system that will set it apart from anything else. The Geo-D will perform as well in a ground stack configuration as it does as a flown array and the Geo system cardioid pattern will minimise stage spill under both flown and stacked conditions while directing its monumental output to a shaded and controllable coverage area, with no variations in polar pattern across the sound spectrum.
This system takes the patented Nexo Tangential array to its natural zenith of functional application and it is not too far-fetched to say that it will be another 25 years before the technology within this system will be surpassed (check out the birth of the array article in this edition of Filter for a more detailed analysis).
As the idea of the tangential array is starting to catch on, it was interesting to see imitators starting to appear at the show. At least two other mainline companies are promoting the idea with their own take on how it is achieved. The only thing missing is the science. As for the new Nexo system, we will look at it in more detail over the next couple of months but for now, here are some “spy” photos from the show.
Flying the new Nexo Geo-D and array alignment is quick and easy. The cardioid sub-bass boxes can hang at the top or the base of the array as required or as a complete hang on their own.
The hardware also allows the whole array to be ground stacked on the sub boxes or on their own. They can even be transported this way and just wheeled onto the stage.
Sub boxes can be flown with the array as well as ground stacked. The new Geo-D sub can also integrate with the other Geo-S and Geo-T systems.
Like all Nexo boxes, weight is not a big issue either. This whole array is hung from some lighting truss with a bigger than necessary Stagemaker hoist. ( Europe 's safest chain motor).
Physics lesson coming; GT's Peter Thoms gets the background tech rave from Nexo's Eric Vincenot, the man behind the Geo (along with Francois Deffarges). Fifteen years ago Eric pioneered Laser Inferometry as applied to measuring the behavior of diaphragms under differing air mass conditions. The discoveries made possible the Nexo wave-guides, phase plug tech and other patented products that make Nexo boxes so uniform from model to model.
Needless to say, the Nexo stand was one of the busiest of a very big exhibition that literally “goes for kilometers”.
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