Hybrid Audio Technologies Legatia SE - Manual (Page 23)

Legatia SE User’s Manual ©Hybrid Audio Technologies Page 23 of 73
Legatia L4SE Wide-Bandwidth Midrange/Full-Range
History
The Legatia L4SE’s topology is an enhancement of the massively successful first-generation Legatia
L4 transducer which was first launched in May 2007.
By early Spring 2010, a beta prototype pair of Legatia L4SE’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 John “Fozz” Myers and Hajji Grape, for real-world
evaluation. After countless hours testing 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 L4SE was launched in
September 2010 and is the reference 4.65-inch driver in Hybrid Audio’s product category known
collectively as the Legatia SE Series.
Notably, approximately eight months after launch, using the L4SE’s as a dedicated wide-bandwidth
midrange driver in his own sound quality competition car, Scott Buwalda set the highest recorded
score of all time in organized sound quality competition (996 points) at the IASCA
®
North American
Championships on March 19-20, 2011. This achievement has been memorialized by IASCA
®
in
writing as the highest score on record, and it has been noted by IASCA
®
that the score achieved will
likely remain the highest combined sound quality and installation quality score of all time, in any
format, in any part of the world.
Attributes
The Legatia L4SE is a 118mm (4.65-inch) 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 L4SE’s design attributes:
Basket
The basket of the L4SE is a shared design with the Legatia L4 for easy upgrade potential; the L4 and
L4SE are interchangeable in mounting topology. The basket is a high-quality cast aluminum design,
and contains a 118mm 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 “4-inch” driver, or in custom
locations at the discretion of the end-user, boasting a depth of just 58mm (2.28-inch). 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 L4SE 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