Triangle Magellan - Manual (Page 38)

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
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D P S T M 2
Dynamic Pulse System
Grand Concert, Concerto and Quatuor (only the tweeter)
TM
TRIANGLE was one of the fi rst manufacturers to turn its attention to
symmetric bipolar diffusion, resulting from research into directivity lobes to
better understand how the human ear perceives sound waves.
As early as 1988, TRIANGLE had already begun incorporating a type of
pre-DPS TM into their innovative Transept II, Zenith II and Elypse systems.
A long interruption in the commercialization of this type of product allowed us
to optimize the system, particularly with regards to the driver/fi lter pairing,
to enable perfect phasing of the drivers.
After numerous hours of listening and measuring tests, this confi guration
demonstrated its adaptability to a variety of listening environments.
Conventional systems do not feature a driver in the rear. The sound signal
is only radiated towards the front... Positioning the system near the walls
will reinforce the low frequencies (the bass sounds). This means that
conventional speaker systems suffer from a compromised tonal quality if
they are not correctly positioned in the listening area. One way to fi x this
problem with conventional speaker systems is to place them away from the
walls and then to try out different positions in the room, in search of the ideal
compromise..
In the DPS TM 2 system, we were able to improve the sonic quality by reducing
the directivity. The directivity is characterized by the difference between the
speakers’ frequency response in the mid-high range on the centerline and
30o off.. The wider the difference, the greater the speaker directivity.
A speaker equipped with the TRIANGLE DPS TM system has front-back sound
emission.
The principle of the DPS TM system, following the example of live music –
whether it is a symphony orchestra, a jazz or string quartet – will send out
almost as much sound energy to the front as to the back of the emission
point.
Let’s take two speakers, one with the DPS TM system and one without,
both positioned at 40cm from a wall. We will take two measurements at
30° in relation to the speaker centerline. The dotted line represents the
measurements taken of the speaker response without DPS TM while the solid
line represents the speaker response with DPS TM .
As you can see, with the DPS TM system we are able to capture the energy
outside of the listening centerline, since the frequency response at 30° is
fl at. The sound volume is spread evenly in front of the listener, instead of
being focused into one beam of sound.
Thanks to the DPS TM system, the speaker is less directive and thus less
susceptible to the creation of warm or cold spots in relation to the listening
environment. The speaker can be positioned more easily in the room for
acoustic reasons and thus produces a deeper and more stable sound image.
The balance of tone is preserved as it was when recorded. This means that
there is a wider opening of the sound stage without any added coloration of
the original signal.
Low Directivity at 30° Owing to the DPS 2 System
model and principle of the DPS 2 System