The most unfortunate option - particle board. A little better - plywood, although resonating especially last a very, very controversial. If the housing of these materials manufacturers add a back cover made of fiberboard (MDF, hardboard he is), then the buyer runs the risk of the good old mailbox, complete with speakers.
Alas, many branded companies guilty of such #39;delights#39; - for example, Sony with the, at first sight, sturdy columns.
The most widely used now received material called MDF (Medium Density Fibreboard). This eco-friendly material, as additional binder is used. Manufactured by dry pressing fine wood chips at high temperature and pressure.
After that is thoroughly drying, which brings the physical properties of MDF to the properties of solid wood. The new material is replicated by such well-known companies such as Creative and Video Ligic.
The traditional gray plastic (high impact polystyrene) is not suitable for the manufacture of such a responsible host acoustics, as the case. But synthetics synthetics strife. New types of high-impact plastic with a special manufacturing techniques allow bad absorb resonant oscillations (if the material has the required viscosity).
On top of that they are completely safe from an environmental point of view.
Mention should column, made by technology firms SoundSurface NXT (http://213.86.36.8/nxtsound/index.asp). For these emitters plastic housing - the most suitable in most cases, other materials just do not fit. The technology SoundSurface that if a flat surface to initiate a certain place and a certain frequency vibrations generate surface acoustic waves.
NXT flat-panel speaker makes for a different type of pathogens (piezoelectric, electromagnetic), and they have developed #39;sounding#39; materials, from cheap laminated cardboard to glass and carbon fiber panels.
By the way, with quality home audio equipment is not always clear to everyone. Bursting with pride when the owner of the columns with the declared parameters, 20-20 000 Hz displays the corresponding label, I want to give him the fundamental work of #39;high-quality speakers and izluchateli#39;2. Or at least cause this book one fact under normal atmospheric pressure in order to reproduce the frequency of 31.5 Hz, speakers must have a volume of about 270 liters (cooler medium sizes). This acoustics exists and is used as reference monitors in the recording studio. Big studio monitors - something like a fireball #39;Formula 1#39; in the automotive industry.
But even the most elite schools do not claim to be honest sound reproduction with a frequency of 20 Hz.
Price: $ 470
