Manufacturing of a Jean Maurer loudspeaker

FOR TECHNICAL DETAILS, PLEASE READ THE DESCRIPTION
Discover the different steps in the manufacturing of an exceptional loudspeaker. In this video, we present the realization of the boxes, the assembly of the loudspeakers, the manufacture of our passive filters and obviously, the final assembly of our products. All this know-how is the combination of passion and time: Since 1971 we have been striving to produce, in our workshops, the best that can be done in the field of music reproduction...
Technical explanations to answer various questions:
Whatever speaker you manufacture, it is necessarily subject to the laws of physics. To give you an overview of the complexity involved in complying with these laws, we have published a booklet dealing specifically with this vast subject: www.jeanmaurerhifi.ch/enceint...
Why use chipboard?
The choice of wood panels is absolutely not economic, but technical.
We use 2 types of wood:
- Kronospan from Swiss Krono for all large parts that do not require complex machining. This wood is extremely absorbent, which allows any parasitic vibration to be stopped very quickly.
- MDF (also from Swiss Krono) for all parts that require fine machining precision.
The first reason for choosing these woods is that the speaker should be as inert as possible. Its purpose is to reproduce instruments. If the speaker starts to vibrate, it becomes an instrument itself and no longer reproduces the original sound. One of the characteristics of the Kronospan panel is that it is extremely inert due to its specific structure. It's not a classic chipboard.
The second reason for not using solid wood is that it "lives" and "works" over time. There is a reason why an instrument must be regularly re-tuned; it is very sensitive to temperature and humidity variations. Solid wood is therefore not at all recommended for the manufacture of an acoustic enclosure.
Why use a very thin panel for the back of the speaker?
The back of our speakers is indeed very thin as it is double and filled with sand, in order to be highly absorbent, but also to provide very low resonance frequency (our ear is very permissive in the extreme bass). The disadvantage of dense panels is their relatively high natural frequency.
To better understand the structure of our speakers, please consult our technical document on page 15: www.jeanmaurerhifi.ch/annexes...
In our new speaker model, the sides and front panels are also filled with sand. You can watch the short presentation video: • Présentation de la nou...
Why don't we put on a mask during the spraying phase?
Our ventilation is very efficient and the mists of varnish are sucked before they come back. All this is regulated.