Hybrid Audio Technologies Legatia SE - Manual (Page 17)

Legatia SE User’s Manual ©Hybrid Audio Technologies Page 17 of 73
Legatia L3SE Wide-Bandwidth Midrange/Full-Range
History
The Legatia L3SE’s topology is an enhancement of the massively successful first-generation Legatia
L3 transducer, as well as the revised “version 2” Legatia L3V2 which was launched in October 2011.
By early Spring 2010, a beta prototype pair of Legatia L3SE’s had been refined after hundreds of
hours of testing and development; these highly-evolved drivers were sent to various national- and
world-championship competitors, notably including David Edwards, multiple MECA champion, and
Jorge Juaristi, multiple USACi Mexico champion, for real-world evaluation. After countless hours
testing on the speakers under various circumstances, both as a dedicated midrange and as a wide-
bandwidth full-range driver, final approval was given. Production refinements were mid-Summer of
2010, to incorporate features inclusive and proprietary to the Legatia SE line, and final production
commenced August 2010. The Legatia L3SE was launched in September 2010 and is the reference
3.7-inch driver in Hybrid Audio’s product category known collectively as the Legatia SE Series.
Attributes
The Legatia L3SE is a 93mm (3.7-inch) “small format” wide-bandwidth midrange/full-range driver to
compliment both two-way and three-way system designs, where a point-source midrange and/or full-
range driver is required. The following are the L3SE’s design attributes:
Basket
The basket of the L3SE is a shared design with the Legatia L3V2 and the original Legatia L3 for easy
upgrade potential; the L3, L3V2, and L3SE are interchangeable in mounting topology. The basket is
a high-quality cast aluminum design, and contains a 93mm flange providing for the mounting of the
driver via four screw holes (the use of 3mm cap head screws is ideal). The overall dimensions of the
driver are very amenable for use in the car audio environment, and in locations typical of the standard
“3-inch” driver, or in custom locations at the discretion of the end-user, boasting a depth of just 44mm
(1.7-inch), 1mm deeper than its Legatia L3V2 counterpart. The basket features large openings
behind the cone to eliminate chuffing and other aerodynamic-based noises, as well as provides
adequate communication to the back of the cone for acoustic suspension and proper operation.
Motor
The motor of the L3SE is paramount to the performance of the driver, providing for a flat and wide BL
curve (as a learning note, BL is the equivalent of torque in a car; a car with a flat and constant torque
curve provides much better acceleration and performance than a car with a peaky, non-constant
torque curve). The BL curve is flat and extended, yielding 6mm of two-way linear excursion, resulting
in the L3SE being able to accurately track the input signal. Reduced distortion and greater dynamics
are the immediate sonic benefits. The motor of the L3SE includes an opposing double-stacked
NdFeB magnet to improve restorative force, compliance, motor strength, displacement, and power
handling. The magnet assemblies are fully surrounded by the voice coil.