Hybrid Audio Technologies Legatia L4SE Stage VI Carbon, Specifications Library & Car Audio Reference Manual

Page: 16 / 35

Legatia SE Carbon User’s Manual ©Hybrid Audio Technologies Page 16 of 30
Legatia L6SE Carbon Midbass
History
The Legatia L6SE Carbon’s topology is a brand new design for Hybrid Audio Technologies, and does
not include any family derivatives in the product line (unlike that of the L4SE Carbon, which is a direct
derivative of the massively successful Legatia L4SE transducer which was first launched in August
2010).
At the onset of the Legatia SE Carbon program, the purpose for the series was to be an exceptionally
high-end option for shallow-depth midbass drivers to be used specifically in German automobiles, and
in other vehicles where typical-depth high-quality midbass drivers would not fit, and where depth was
at a premium. By early Spring 2011, a beta prototype pair of Legatia L4SE Carbon midbass had
been refined after hundreds of hours of testing and development; these highly-evolved drivers were
sent to close industry affiliates for third-party testing and evaluation, specifically in the Porsche 928
vehicle platform as a dedicated door-mounted midbass, paired with a low-resonance tweeter. Shortly
thereafter, the L4SE Carbon was produced and began distribution in October 2011.
Concurrently with the L4SE Carbon project, the Legatia L6SE Carbon project was born, also to satisfy
the need for a shallow midbass driver in a true 6.5-inch diameter “universal hole pattern” frame
platform, for use in predominantly German automobiles where shallow grille clearance and shallow
depth were a necessity, but also in universal applications where mounting depth was at a premium.
The L6SE Carbon project required several iterations of alpha samples for real-world testing as we
refined the performance of the driver in several key areas, including moving mass, resonance
frequency, usable frequency response, sound pressure level, and Qes/Qms/Qts. The result of this
effort was recognized by our in-field testers, confirming that we had landed on a premium-entry
speaker with shallow depth that did not sacrifice sound quality and robust output.
The L6SE Carbon project required most of 2011 to complete, and in fact, required the first few
months of 2012 to perfect the design for its intended purpose. Production commenced April 2012,
and the L6SE Carbon was released to an enthusiastic reception in June 2012.
Attributes
The Legatia L6SE Carbon is a 164.5mm (6.5-inch) midbass driver to compliment both two-way and
three-way system designs, where a shallow-depth, long-throw midbass is required. The following are
the L6SE Carbon’s design attributes:
Basket
The basket of the L6SE Carbon is a new design for Hybrid Audio Technologies, and is not shared
with any other product in the Hybrid Audio line-up. The basket is a high-quality cast aluminum
design, and contains a 164.5mm flange providing for the mounting of the driver via four screw holes
(the use of 4mm 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 “6.5-inch” driver, or in
custom locations at the discretion of the end-user, boasting a depth of just 62mm (2.44-inch) (16mm
less than the Legatia L6SE). The basket features large openings behind the cone to eliminate