Kenwood KAC-8401 Instruction Manual page 11

Tri-mode
Subwoofer
(L
+
R) (Bridged)
(High pass)
CENTER UNIT
L,
r.
I ........... I
.Principle of Tri-mode
Method of frequency band division using a coil and capacitor..
.
in case of GdB/oct. slope
0 dB
-3 dB
Coil
(L):
Passes low frequencies and blocks high
frequencies. (Low pass)
Crossover Frequency
/
\;/
CaDacitor (CI: Passes hiah freauencies and blocks low
. .
frequenci&. (High pass)
fc=Cut of Freauencv (Hz)
. .
R=Speaker Impedance (Q)
L=
~
15' (mH)
Frequency
fc
.Example:
When it is required to set a crossover frequency of 120 Hz using speakers with an
impedance of 4 ohms.
Prepare commercially-available coil and capacitor with the closest ratings to the results
calculated from the formula above. The capacitor rating should be as close as possible to 331.25
(pF) and the coil rating should be as close as possible to 5.3 (mH).
I
ACAUTION
I
* I f you wish to bridge-connect a speaker, the speaker impedance must be no less than 4 ohms.
Be sure to connect capacitors to speakers to which high frequencies will be passed. Failure to
Ensure that the withstand voltage and current ratings of the capacitors (C) and coils (L) are
Connecting a speaker with an impedance lower than 4 ohms may damage the unit.
do so will result in a drop of the combined impedance with the subwoofer.
sufficient.