A combination of traditional folk art and science

NORH LOUDSPEAKER

 
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Making Norh Marble Drums

Many of our customers have wanted to know why it takes up to several months to get a pair of marble 9.0s or 7.0s. We thought we would give a little tour of what it takes to produce the marble loudspeakers.

The first step is to start with a large hunk of solid marble. There is no way to know when starting what the marble will yield. 30% of all our drums are lost during the manufacturing process. We start with 800 pounds of material to produce just one loudspeaker.






The second step is to cut the rock into blocks that will then be lathed into the drums. The saws use diamond blades and have to be cooled with running water. Thailand marble is very hard compared to Italian and other European marble.





The drum is formed from a solid block of marble. The work is done using diamond tipped hand tools. Here a stonemason is shown forming the port out of solid rock.





The marble is then polished. The baffle is also formed from marble. The baffle is sent out to be covered in leather. The leather covered baffle is returned to the stone mason where it is fixed to the marble drum. Metal rings are epoxied to the inside of the baffle to make it easy to attach the drivers.




 
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