Lambda Labs - Professional Acoustics TX-1A Manual
2.2.1.6.
Amplifier
Module
&
DSP:
Preset
Assignment
Due
to
the
complexity
of
the
signal
structure,
a
programming
of
the
presets
by
the
customer
is
not
supported
by
Lambda
Labs.
The
integrated
setups
already
fulfill
the
demands
of
the
most
common
applications.
To
allow
for
settings
of
EQ
or
delay,
a
controller
can
be
inserted
in
the
signal
path
to
adapt
the
active
speaker
to
every
acoustical
situation.
For
any
questions
about
the
presets,
please
contact
the
Lambda
Labs
support.
PRESET
1:
Fullrange
65Hz
Preset
1
is
intended
for
stand-alone
operation.
The
low
cut-off
frequency
is
65Hz
(+/-
3dB).
PRESET
2:
Fullrange
70Hz
Select
Preset
2
to
operate
the
TX-1A
fullrange
as
well,
but
with
70Hz
(+/-
3dB)
low
cut-off
frequency
and
therefore
with
higher
maximum
SPL
capability.
PRESET
3:
Crossover
Mode
100Hz
Setup
for
the
TX-1A
to
be
used
in
combination
with
the
MF-15A
subwoofer
is
Preset
3.
To
match
to
the
TX-1A,
the
MF-15A
should
be
driven
with
Preset
2.
If
needed,
a
cardioid
mode
can
be
realized
by
using
an
additional
MF-15A
with
the
Preset
4.
For
further
detailed
information,
please
read
the
MF-15A
manual.
Crossover
Mode
Preset
3
has
a
24dB/oct.
Linkwitz-Riley
high
pass
filter
at
100Hz.
Accordingly,
the
used
subwoofer
should
have
a
24dB/oct.
Linkwitz-Riley
low
pass
filter
characteristic
at
100Hz.
The
delay
has
to
be
adjusted
in
a
way
that
both
systems
have
matching
phase
responses
in
the
crossover
region.
Especially
in
case
of
subwoofer
systems
which
exhibits
larger
propagation
delay
(horn
loaded
systems)
larger
delay
values
have
to
be
set
using
an
extra
processor
unit.
PRESET
4:
Floor
Monitor
65Hz
The
monitor
setup
is
principally
intended
for
stage
monitor
applications
with
ground-positioning.
Big
and
acoustically
hard
boundary
surfaces
just
near
to
the
loudspeaker
are
causing
a
shift
in
the
tonal
balance
in
the
low
frequencies.
This
effect
is
considered
and
compensated
in
the
monitor
setup.
!
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