technology

Concrete loudspeakers Made in Sweden

The technique behind Rauna

 

It is not a coincidence that Rauna looks and are build in the way they are. Everything is practically done to perform as natural and uncoloured as possible.

 

Cabinet

 

The actual "box" is made of a special kind of concrete, all made in Sweden..

 

For the loudspeakercabinet this means remarkably less vibrations than other materials, and we have also made a special kind of damping inside the box that reduces high-frequenzy resonanses to a minimum. The actual cabinett only purpose is to have a certain volume and not to add any own vibrations.The music/movie-sound should be delivered as natural and uncoloured as possible, which the cabinets of Rauna really manage..

 

The format of the cabinet is acoustically "thought through" and the unregular shape mimimizes the risk of "standing waves", inside the box.

 

The frontpart has a 15 degrees leaning to make the treble and bass-unit aligned in the same phase. Meaning all sound is reaching the listener at the same time..

 

Imagine that the same cabinett would be made in wood as stable as the molded concrete. What would it cost? would it even be possible?

 

 

Crossover

 

For the crossover in our latest models and upgradekits, we have been developing for more than one year. Each crossover is than separately adjusted to every model..

The purpose of the crossover is to semingless combine all the parts of a speaker to one solid performer. This is the hardest part where we have spent most of our time. The components are "hardwire" and from recognised Danish supplier Jensen.

 

 

Driveunits

 

The driveunits is of a splendid quality for the money. The bassdriver has a powerful wented magnet an de the basked is molded in metal. The actual cone is made of paper which sounds very accurate especially in the sensitive midrange, and thereafter we have coated it with a special glue to make it stiffer.

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The trebleunits we used are softdomes (fabric) ad with unusually good resolution and soundstage.

 

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