Hybrid Audio Technologies Legatia SE - Manual (Page 30)

Legatia SE User’s Manual ©Hybrid Audio Technologies Page 30 of 73
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 18mm of two-way linear excursion,
resulting in the L6SE being able to accurately track the input signal. Reduced distortion and greater
dynamics are the immediate sonic benefits. The motor of the L6SE 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.
Voice Coil
The voice coil diameter of the L6SE is a large 35.55mm (1.4-inch), which is the proper balance
between size and moving mass in super high-end mobile audio midranges/midbass. The voice coil
diameter serves several key functions: elevated power handling, dissipation of heat (thereby lowering
power compression), and maximizing the size of the magnet assembly for enhanced motor
compliance. The voice coil is high-purity aluminum, which is superior to copper for heat dissipation,
as well as significantly reduced moving mass. The result is an extremely light weight winding with
good power handling and low inductance.
Suspension
The inverted surround is butyl rubber which is highly consistent, and does not suffer the variance of
natural rubbers. This rubber surround terminates mechanical vibrations well, having a low stiffness
for positive damping of resonances. The spider material was chosen for optimal performance; the
spider is a 90/10 cotton/Nomex blend with single-dip low viscosity phenolic. This material provides
the stiffness desired without being overly brittle or stiff, where vibrations in the spider are well damped
and do not translate into the former or the cone.
Cone
Like other Legatia SE midrange designs, you will find no composite or metal cone materials used on
the L6SE, as our approach to point-sourcing is to allow the Legatia SE midbass/midrange driver to
effectively play into middle treble frequencies. The Legatia L6SE is a cone-type driver consisting of a
proprietary hybrid paper diaphragm with extremely low moving mass. Paper is widely acknowledged
as the best-damping material, as it provides the near optimum balance of strength and weight. The
cone has been treated with a water resistant element at the rear to accommodate door mounting, or
other areas prone to occasional contact with liquid. The cone design offers a wide dispersion pattern
to make for flexible installation and speaker location. The Legatia L6SE has an outstanding extended
frequency response; the usable frequency range of this driver exceeds seven complete octaves of
usable bandwidth on-axis (50 Hz – 10,500+ Hz). Even off-axis, the L6SE faithfully recreates more
than five full octaves of information, for the ultimate midrange/full-range driver.
Phase Plug and Shorting Cup
The L6SE comes equipped with a phase plug pole piece extension at the center of the cone. The
phase plug is aluminum and, by design, ensures enhancement of the total inductance profile,
providing much of the inductance reduction benefits noted. The phase plug is plated with rose-tinted
copper, which by design does not negatively reduce eddy current, and adds thermal dissipation
potential, not to mention sleek, class-leading cosmetics. The phase plug extends well down inside
the pole vent, and acts as a very large and efficient heatsink for any heat that radiates into the pole.
The highest frequencies of audio emanate from the area around the center of the cone and the lower