L3x Three-Way
Passive Crossover
Connection
The L3x has convenient spring-loaded terminals for
wire connection. Bare wire can be twisted tightly
and inserted into the spring-loaded terminal;
however Hybrid Audio recommends that the wire
be tinned with solder to avoid oxidation, fraying,
and to promote a better connection. The following
is the connection nomenclature on the L3x, from
left to right on the circuit board:
+WF Woofer positive input from amplifier
IN -
Woofer negative input from amplifier
+WF Woofer positive output to Hybrid Audio
Technologies midbass or midrange positive
terminal
OUT - Woofer negative output to Hybrid Audio
Technologies midbass or midrange negative
terminal
+M/TW Midrange and tweeter positive input from
amplifier
IN -
Midrange and tweeter negative input from
amplifier
+M/H Midrange positive output to Hybrid Audio
Technologies midrange positive terminal, 0
dB
setting
+M/L Midrange positive output to Hybrid Audio
Technologies midrange positive terminal, -3
dB
setting
+T/H Tweeter positive output to Hybrid Audio
Technologies tweeter positive terminal, +3 dB
setting
+T/M Tweeter positive output to Hybrid Audio
Technologies tweeter positive terminal, 0 dB setting
+T/L
Tweeter positive output to Hybrid
Audio Technologies tweeter positive terminal, -3
dB
setting
TW - Tweeter negative output to Hybrid Audio
Technologies tweeter negative terminal
NOTE: the L3x is a bi-wired crossover, meaning the
crossover has two sets of inputs for use with two
two-channel amplifiers or a four-channel amplifier.
If you wish to not use two two-channel amplifiers
or a four-channel amplifier, and use only one
two-channel amplifier instead, simply “bridge” the
connections b WF and + M/T and IN – and
IN – with two short strands of insulated wire.
Once all speakers are installed, you will need to
do a brief listening test with CD-quality music
that you are intimately familiar with to determine
which midrange and/or tweeter attenuation you
desire. Be sure that all equalization, bass, and treble
levels are defeated or set to “zero” on the source
unit before evaluating the intensity of the tweeters
with respect to your midrange/midbass level and
your listening taste. Note also, after approximately
25 hours, the speakers will begin to “break in”, like
any mechanical component, and intensities may
need to be re-adjusted again. In other words, the
midbass and midrange need to be broken in with
typical play-time before final midrange and tweeter
attenuation is set. You may find that after break-in,
the midrange and/or tweeter intensity will need to
be re-adjusted.
Mounting
Choose your L3x mounting location carefully. The
L3x contains parts that are susceptible to damage
through repeated shock, moisture, and electromag-
netic interference. For example, it is advisable to
install the passive crossovers inside the passenger
compartment versus the door, since the door is
exposed to repeated opening and closing “shock”
which may damage the delicate passive crossover
components, or cause soldered joints to break over
time. Likewise, moisture may be present in a door
installation. Finally, if you are mounting the passive
crossovers in the kick panels or dashboard, be sure
to keep the networks away from any noise-inducing
device within the vehicle, such as factory ECU’s,
auto transmission control ECU’s, BCM’s, alternator
field/stator wiring, and numerous other devices.
Readers note: be mindful of the location of throttle,
brake, and clutch pedals when you are selecting a
mounting location and where to route the speaker
wiring.
If the only option for crossover mounting is in
the door, it would typically be prudent to install
the passive crossovers immediately adjacent to
the midbass location to keep speaker wiring and
connections short and allow access to the OEM
wiring, if it is used, without having to extend it and
creating an additional resistive splice in the wire.
If you must install the L3x in the door, DO NOT
MOUNT THE CROSSOVER INSIDE THE DOOR CAVITY!
Rather, install the networks on the same mounting
plane as the midbass, toward the passenger
compartment, and behind the OEM door panel/skin,
so as to not expose the delicate electronic parts
contained within to moisture inside the door cavity.
Once an adequate spot for mounting the L3x is
found, securely mount the crossover networks using
the supplied screws. Before any cutting, drilling, or
insertion of screws, check the clearance of the panel
from behind to verify that you won’t be damaging
existing wiring, window or door lock motors,
window tracks and the windows themselves, and
etc.
Summary
The Legatia L3x is an exceptional-quality three-way
passive crossover device that can be used with any
Hybrid Audio speaker system to accommodate
any number of different bespoke system designs.
At home in virtually any arrangement, the L3x is
Hybrid Audio Stage V high-end three-way passive
crossover, boasting exceptional performance and a
design philosophy that goes hand in hand with true
high-fidelity playback.
Although the Legatia
L2x is listed in the Stage
V Legatia series, it has
multiple complimentary
uses for Legatia Pro
products as well, given the
complimentary crossover
topology and use of
low-tolerance, asymmetri-
cally-aligned componentry
and lack of board-mounted
equalization
Legatia Pro
Speaker
Design
© Hybrid Audio Technologies • Cumming, GA • 770.888.8200
© Hybrid Audio Technologies • Cumming, GA • 770.888.8200
24
25
