Hybrid Audio Technologies Legatia - Manual (Page 21)

Legatia User’s Manual ©Hybrid Audio Technologies Page 21 of 65
Legatia L4 Wide-Bandwidth Midrange/Full-Range
History
The Legatia L4 is the original high-end Legatia offering in a 4-inch format from Hybrid Audio
Technologies. The Legatia L4 transducer was originally launched in May 2007 to an enthusiastic
reception of car audio competitors, enthusiasts, and car audiophiles. The Legatia L4 followed the
imminently successful Legatia L3 as a larger format, phase plug-style midrange and wide-bandwidth
driver, and incidentally was one of the first 4-inch wide-bandwidth driver manufactured specifically for
use in the car environment. Hybrid Audio would like to think that we helped introduce the concept of
wide-bandwidth / full-range drivers to the car audio community starting in 2007.
The L4 is the only current Legatia product line that has not been revised, and the reason is that the
driver was, and is so good be begin with, and it has become difficult to justify a “V2” version for the
L4, since its performance is spectacular, as recognized around the world by consumers, competitors,
and dealers.
Attributes
The Legatia L4 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 L4’s design attributes:
Basket
The basket of the L4 is a shared design with the Legatia L4SE 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 54mm (2.12-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 L4 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 L4 being able to accurately track the input signal. Reduced distortion and greater dynamics are
the immediate sonic benefits. The motor of the L4 includes a high-energy strontium magnet that fully
surrounds the voice coil.