Technology of Making Wooden Cups for Earphones
- All wood species (all wood) used for making earphone bodies and cups always undergo processing with the utilization of antibacterial, subsequent drying and coating with substances making them pleasant to look at and resistant against environmental factors.
- Wooden cups are made according to a specially developed procedure. The way the wood species, the cup shape and the acoustic body volume (amphitheater, helix) influences the sound is taken into account.
- Cups are manufactured by a 3D model on a computer controlled precision machine; they have top processing quality and geometric shape repeatability.
- After the milling operation, the cups are sanded and polished only by hand.
- After sanding, wood is coated by special oils to protect it from humidity and prevent drying and ageing.
- After that, the work pieces are processed with high-frequency microwaves for several minutes to for better oil receptivity and disinfection.
- After that, cups are covered by hot wax and dried in special drying chambers for about 1.5 hours. Temperature may reach 74 degrees Centigrade (Temperature varies from 60 to 74 degrees depending on the species of wood).
- Drying is followed by cooling at room temperature for at least 6 hours. The work piece is ground for the second time, hot wax is again applied; this is followed by drying at the same temperature for about 8 hours.
- The closing stage of the work includes thorough polishing of the cup, laser engraving of the logo and other elements as per the approved design, and in some cases, patina forming treatment for decorative finish that makes the surface look perfect.
8-Stepped Amphitheatre Cups
We use a patented 8-stepped Amphitheatre technique for making cups. Each step of the amphitheater is a surface that reflects sound waves. Being located at various depths, steps reflect sounds with various wave frequencies. An eight-stepped Amphitheatre ensures greater number favorable re-reflections inside the cup than a five-step one and spreads tones more evenly.
The Difference between Helix and Amphitheatre Cups
We use patented helix system in the most expensive versions of wooden cups. The process of making such cups is very labor intensive and time-consuming. But the result attained when you use this configuration is worth the effort. An Amphitheatre is a set of flat surfaces located at various depths and creating a pattern of favorable reflections. A helix does not have any flat surfaces and is asymmetric at every point; therefore, it disperses sound waves inside the cup chaotically, giving an incomparably richer pattern of internal re-reflections than an Amphitheatre. A helix provides better resonance suppression system that means that the dispersion of sound waves is much higher.
How Wood Species Influence Sound
Wood species differ by density, elasticity, porosity, fibers shape and adhesion. As a result, fundamental resonance frequencies and material damping factor vary significantly in different wood species. The more dense is the wood, the lower is the damping factor and the higher is the fundamental resonance frequency and the longer is the duration of wave fluctuation in the wood; therefore, it is going to render influence on the sound more intensely and in a higher spectrum. Choice of wood with various physical characteristics can change the tonal characteristic in a desired spectral region of the sound, from accenting midbass region to giving natural overtones to the highest voice and making concert hall reverberations more readable.
Species for sound
The influence of a species of wood used in headphones on the sound timbre is often underestimated. In general, the denser the wood, the sharper and brighter the sound, and the lower the density the streamlined and softer the sound.
The sound is transmitted from the inner walls of the headphone body to your ear. The ear picks up vibrations of the body that are influenced by nearly every part of the headphone chamber. Different parts resonate in different ways, thereby increasing some frequencies of the timbre and filtering out others. Moreover, the ear also picks up purely acoustic sound of the headphone body which is combined with the basic sound of the driver.
The wood used in the headphone body influences the sound nearly in all phases, but the greatest effect is observed immediately after the sound is produced and when it attenuates. We should neither forget that each piece of wood is unique in its kind: even two pieces of the same species will differ from each other in their characteristics. Moreover, each listener has a different perception of what good sound is. Therefore, all the following descriptions of the wood species and their influence on the sound are more of a general and subjective nature.
The characteristics below are based both on our own observations and on the findings of musical instrument makers.
Audio passive enhancer APE-02S
Exciters and enhancers are used for changing tone quality of the sound. However, unlike an equalizer that just amplifies or mutes a frequency that is already present in a signal, enhancers can create new harmonics. A passive frequency filter is used for correcting amplitude-frequency characteristics and giving a desired tonality to the sound. The APE-02S we use only in “High Edition” versions.
Types of caps finishing
All Fischer Audio wooden caps are oil-finished. Despite the fact that this way of processing is more difficult than usual varnish coating, all of the Fischer Audio cups subjected to repeated treatment oil and wax finished. All oil and wax components are only natural. Thanks to this, our cups are ecologically safe, not afraid of moisture and other corrosive environments, very easy to restore the initial state, are not afraid of occurrence of cracks and chips coverage and, what is most importantly, perfectly convey all the beauty of natural wood.
Fischer Audio wooden Cups (Amphitheatre and Helix types) are Patent Pended.
Patent Number 2498524RU