Carvin FET1000 Instruction Manual - Page 22

Active, Crossover, Bi/Trianwed, Systems

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FET Series Power Amplifiers Biamping and Triamping Speaker Systems Section 5 How to Use an Active Crossover in Bi/Trianwed Systems Understanding the optimum operating frequency ranges and power handling capacities of the loudspeaker drivers in your system is essential to properly setting up the active crossover in a multiamplified sound system. This information will help the system operator to select the best crossover points and optimize the response of the system. For example, a high frequency driver may have an optimum response range from 1500 Hz to 20 kHz. Its power handling capacity within that range might be 60 watts. The best choice for a crossover frequency would then be 1500 Hz or higher. To choose a lower crossover frequency could cause excessive voicecoil excursion and would reduce the power handling capability of the driver. Note: For every octave a drivers frequency range is lowered its power handling capacity is divided by four. So, dropping the crossover frequency from 1500 Hz to 750 Hz would reduce the above driver's power handling capacity from 60 Watts to approximately 15 Watts. However, a higher crossover point could allow for increased power handling capacity and less distortion. If a higher crossover frequency was desired (for example, 2 k or 2.5 kHz) then you would want to choose a woofer (or mid-range) speaker to compliment this crossover frequency. So, you would look for a low or mid-frequency driver that maintained a response out to the desired crossover frequency. The Carvin XC-1000 electronic crossover is an excellent example of a high quality active crossover. It features 18 dB/octave Butterworth filters which provide maximum protection for high frequency drivers and have accurate summing characteristics. It offers sweepable parametric selection of crossover frequencies. As with any professional audio product, its inputs and outputs are balanced. Carvin highly recommends the use of this crossover with any of our professional biamp or triamp systems. Some recommended settings for biamping and triamping Carvin's speakers are as follows: Carvin Loudspeaker Systems 3018 Folded Horn Woofer 1210 Horn Midrange 560 Radial Horn Tweeter 1331 Horn Woofer 992 Three Way Direct Radiator 973 Three Way Direct Radiator 962 Two Way Direct Radiator 852 Two Way Direct Radiator 802 Two Way Direct Radiator 792 Two Way Direct Radiator 752 Two Way Direct Radiator Recommended Crossover Frequency 150 Hz 150 Hz and 2 kHz 2 kHz 2 kHz 500 Hz (woofer to midrange) 500 Hz (woofer to midrange) 2 kHz 2 kHz 2 kHz 2 kHz 2 kHz 5-5

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FET
Series
Power
Amplifiers
Biamping
and
Triamping
Speaker
Systems
Section
5
How
to
Use
an
Active
Crossover
in
Bi/Trianwed
Systems
Understanding
the
optimum
operating
frequency
ranges
and
power
handling
capacities
of
the
loudspeaker
drivers
in
your
system
is
essential
to
properly
setting
up
the
active
crossover
in
a
multiamplified
sound
system.
This
information
will
help
the
system
operator
to
select
the
best
crossover
points
and
optimize
the
response
of
the
system.
For
example,
a
high
frequency
driver
may have
an
optimum
response
range
from
1500
Hz
to
20
kHz.
Its
power
handling
capacity
within
that
range
might
be
60
watts.
The
best
choice
for
a
crossover
frequency
would
then
be
1500
Hz
or
higher.
To
choose
a
lower
crossover
frequency
could
cause
excessive
voicecoil
excursion
and
would
reduce
the
power
handling
capability
of
the
driver.
Note:
For
every
octave
a
drivers
frequency
range
is
lowered
its
power
handling
capacity
is
divided
by
four.
So,
dropping
the
crossover
frequency
from
1500
Hz
to
750
Hz
would
reduce
the
above
driver's
power
handling
capacity
from
60
Watts
to
approximately
15
Watts.
However,
a
higher
crossover
point
could
allow
for
increased
power
handling
capacity
and
less
distortion.
If
a
higher
crossover
frequency
was
desired
(for
example,
2
k
or
2.5
kHz)
then
you
would
want
to
choose
a
woofer
(or
mid
-range)
speaker
to
compliment
this
crossover
frequency.
So,
you
would
look
for
a
low
or
mid
-frequency
driver
that
maintained
a
response
out
to
the
desired
crossover
frequency.
The
Carvin
XC-1000
electronic
crossover
is
an
excellent
example
of
a
high
quality
active
crossover.
It
features
18
dB/octave
Butterworth
filters
which
provide
maximum
protection
for
high
frequency
drivers
and
have
accurate
summing
characteristics.
It
offers
sweepable
parametric
selection
of
crossover
frequencies.
As
with
any
professional
audio
product,
its
inputs
and
outputs
are
balanced.
Carvin
highly
recommends
the
use
of
this
crossover
with
any
of
our
professional
biamp
or
triamp
systems.
Some
recommended
settings
for
biamping
and
triamping
Carvin's
speakers
are
as
follows:
Carvin
Loudspeaker
Systems
3018
Folded
Horn
Woofer
1210
Horn
Midrange
560
Radial
Horn
Tweeter
1331
Horn
Woofer
992
Three
Way
Direct
Radiator
973
Three
Way
Direct
Radiator
962
Two
Way
Direct
Radiator
852
Two
Way
Direct
Radiator
802
Two
Way
Direct
Radiator
792
Two
Way
Direct
Radiator
752
Two
Way
Direct
Radiator
Recommended
Crossover
Frequency
150
Hz
150
Hz
and
2
kHz
2
kHz
2
kHz
500
Hz
(woofer
to
midrange)
500
Hz
(woofer
to
midrange)
2
kHz
2
kHz
2
kHz
2
kHz
2
kHz
5-5