Installation
*NOTE: When using High Level Inputs, if audible engine noise
is
present, connect the Black
wire
to
chassis ground. If noise
is
still present, contact your local authorized dealer or
Lightning Audio customer service.
---jf-
J
1'
m
'.IT.0:
I'~'i
J~.I:
_-===----'1
"~
6dB/Octave
High-Pass
6dB/Octave
Low-Pass
L =
Low-Pass
(Inductor)
C
= High-Pass (Capacitor)
For
more
information,
see
your
Authorized
Lightning
Audio
Dealer.
Freq.
Speaker Impedance
Hertz
2 OHMS 4 OHMS
80HMS
e
m
e
m
e
m
80 4.1mH
1000IJF
8.2mH
500IJF
16mH
250IJF
100 3.1mH
800IJF
6.2mH
400IJF
12mH
200IJF
130 2.4mH
600IJF
4.7mH
300IJF
10mH
150IJF
200 1.6mH
400IJF
3.3mH
200IJF
6.8mH
100IJF
260 1.2mH
300IJF
2.4mH
150IJF
4.7mH
75IJF
400 .8mH
200IJF
1.6mH
100IJF
3.3mH
50IJF
600
.5mH
136IJF
1.0mH
68IJF
2.0mH
33IJF
800 .41mH
100IJF
.82mH
50IJF
1.6mH
26IJF
1000
.31mH
78IJF
.62mH
39IJF
1.2mH
20IJF
1200 .25mH
66IJF
.51mH
33IJF
1.0mH
16IJF
1800 .16mH
44IJF
.33mH
22IJF
.68mH
10IJF
4000
.08mH
20IJF
.16mH
10IJF
.33mH
5IJF
6000 51mH
14IJF
.10mH
6.81JF
.20mH
3.31J
F
9000 34mH
9.51JF
68mH
4.71JF
.15mH
2.21JF
12000 25mH
6.61J
F
51mH
3.31JF
100mH
1.61JF
USING PASSIVE CROSSOVERS
A passive crossover
is
a circuit that
uses capacitors and/or coils and
is
placed
on
speaker leads between the
amplifier and speaker. The crossover
delegates a specific range
of
frequencies to the speaker for
optimum driver performance. A
crossover network can perform one of
three functions: High-Pass
(capacitors), Low-Pass (inductors or
coils)
and
Bandpass (combination of
capacitor and coil).
The most commonly used passive
crossover networks
are
6dB/octave
systems. These
are
easy
to
construct
and require one component per filter.
Placing this filter
in
series with the
circuit will reduce power
to
the
speaker by 6dB/octave above or
below the crossover point depending
on whether it
is
a high-pass or low-
pass filter. More complex systems
such
as
12dB/octave or 18dB/octave
can cause impedance problems if not
professionally designed.
Passive crossovers
are
directly
dependent upon the speaker's
impedance and component value for
accuracy. When passive crossover
components
are
used
in
multiple
speaker systems, the crossover's
effect
on
the overall impedance should
be taken into consideration along with
the speaker's impedance when
determining amplifier loads.
+ CAUTION: The Lightning Audio amplifiers
are
not recommended for impedance
L..U. loads below 2 n stereo and 4 n bridged (mono) loads.
7
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