Kenwood KAC-748 - Manual (Page 10)

System examples
High^'pass (100 Hz} + Subvifoofer (100 Hz) system
(High pass)
Subwoofer
(L + R)
(Bridged)
High-power 2-channel system
Tri-mode
(StS3 Œ]
WFVr SELECTOR
(High pass)** Subwoofer
(L + R) (Bridged)
^Principle of Tri-mode __
Method of frequency band division using a coii and capacitofdn case of 6dB/oct. siope
CoiiiU: Passes low frequencies and blocks high
frequencies. (Low pass)
Capacitor (C): Passes high frequencies and blocks low
frequencies. (High pass)
159000
fc X R fc=Cut of Frequency (Hz)
159 X R , R=Speaker Impedance (£2)
L=
fc
4mH)
^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).
▲CAUTION
• If you wish to bridge-connect a speaker, the speaker impedance must be no less than 4 ohms.
Connecting a speaker with an impedance lower than 4 ohms may damage the unit.
• Be sure to connect capacitors to speakers to which high frequencies will be passed. Failure to
do so will result in a drop of the combined impedance with the subwoofer.
• Ensure that the withstand voltage and current ratings of the capacitors (C) and coils (L) are
sufficient. *
10 English