Our crossover is custom-made and designed to deliver the best signal for the drive units as possible. We only use high quality components from Mundorf to provide a strong signal throughout the crossover. The high quality components and the dimensions ensure a very long lifespan and that the sound characteristics will stay the same and not gradually change over time.
Dome Structure Inside
The inside surface of the speaker is made of domes which work as the walls in a sound studio. It neutralizes any standing soundwaves because there are no parallel surfaces. This dome structure surface contributes to the clean and precise reproduction of the sound exactly as it was recorded. The domes are cast in the cabinet which means no assembled parts can fail over time.
Sandcasting by the Cronig method makes it possible to craft the cabinet in one piece with no assembled parts. The one piece cast cabinet made from our low resonance material gives the speaker a stiffness that conventional cabinets, assembled from several parts will never achieve. The cabinet of JERN14 is so strong that it can withstand a load of 5 ton. The toughness and durability of the cabinet make it impossible for even a heavy metal track to generate any vibrations in the cabinet. This means that there will never be any vibrations from the cabinet that can interrupt the output quality.
Jern14 is prepared and shaped in one piece before the casting. A CNC machined model is used for producing a sand mold which is assembled around a core that provides the inner geometry. Gray iron is melted at 1450 degrees celcius before it is cast into the mould. The quality of the casting is checked with a spectrometer. After cooling, the cabinet is cleaned and its dimensions and tolerances checked. After checking, the cabinet is ready for processing.
The cast iron cabinet makes it possible to mount the drive units solid to the cabinet which is very important for the ability of the speakers to deliver clean audio, free of vibrations.
Unique Fingerprint Surface
Each speaker has a unique surface which is created when the iron flows into the mould. It is a unique pattern that are just like fingerprints; there are never two speakers that are exactly the same.
Finally, the cabinet gets a high quality powder coating.
Advanced CAD Geometry
The one piece cabinet design is made possible by the advanced CAD geometry method. This method gives our designers and engineers the ability to create the ideal shapes for maximum performance without the limitations of wood, which most conventional speakers are made of.
Low Resonance Material
The cornerstone in reducing vibrations are the cabinet material. Manufacturing cabinets with the sand cast method makes it possible to choose materials with a density that is more than ten times greater than conventional cabinet materials. We produce our cabinets in a very unusual material for speakers: gray iron. The material is well known for its ability to reduce vibrations and is used in almost all iron engine blocks.
The combination of material and the one piece design is what gives JERN speakers a distortion free sound with absolutely no interruption from a vibrating cabinet.