Triangle Magellan - Manual (Page 35)

T R I A N G L E I N D U S T R I E S S . A . S - M A N U F A C T U R E E L E C T R O A C O U S T I Q U E
Avenue Flandres Dunkerque - Z.I. les Etomelles - 02200 Villeneuve Saint Germain - France - T. +33 (0)3 23 75 38 20 - F. +33 (0)3 23 75 38 21
[email protected] - www.triangle-fr.com
35
ENGLISH
Our requirements for developing the woofers for the MAGELLAN
GRAND CONCERT and MAGELLAN CONCERTO were as follows:
to obtain a high level of acoustic clarity within the extremely
low 28 - 35 Hz frequency range with a minimum of distortion.
In order to achieve this goal, we began our tests using virtual modeling
techniques to simulate all of the speaker’s possible mechanical and
acoustic characteristics for a range of various enclosure volumes.
This study led to the creation of a brand new 21-cm loudspeaker (the
T21GM).
The development of the T21GM itself led to further research
into the lower part of the spectrum. The results led to na complete
reengineering of the moving parts (voice coil), magnetic motor and
basket of the bass woofer.
THE DIAPHRAGM
For the T21GM we designed and developed a brand new type of
diaphragm, the SVA (Sandwich Vert Alvéolaire, Green Sandwiched Foam).
This cone-shaped diaphragm is characterized by a sandwich structure with
two glass layers containing a cellular material that provides an optimum a
combination of mass damping and rigidity to the moving coil.
THE MOTOR
We designed the T21GM motor to significantly decrease the
loudspeaker’s Total Q factor (Qts). In this way, the MAGELLAN GRAND
CONCERT subwoofer can handle extremely low frequencies, down
to 28 Hz, within -3dB ofv the reference level..
In designing the motor we used special hi-purity metals to machine the
magnetic motor’s pole pieces. The combination of these refinements
paved the way for the development of a powerful magnet producing a
very homogeneous magnetic field.
Computer Modeling
Diaphragm Structure
Magnetic Field Modeling
THE BASS WOOFER