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With the KAC-526, a subwoofer can be added easily to the speaker system by marking use of the
properties of coils and capacitors. This mode of operation is caliedTri-mode.
MPrincipie of Tri-mode
• Method of frequency band division using a coil and capacitor
***in case of GdB/oct. slope
Output
Output
I_
Frequency
Frequency
• Coil (U; Passes low frequencies and blocks high frequencies. (Low pass}
• Capacitor (C): Passes high frequencies and blocks low frequencies: (High pass)
Your coil and capacitor
Use the.following formula to identify the coil and capacitor you need in your system.
C=
159000
(mF)
fc X R
fc=Cut of Frequency (Hz)
L=
-159xR
fc
(mH)
R=Speaker Impedance (£2)
Example:
When it is required to set a crossover frequency of 120 Hz using speakers with an
impedance of 4 ohms.
...
.
Prepare commercially-avaiiable 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).
MSystem example
To use the Tri-mode configuration, set the OPERATION switch to the STEREO position.
Subwoofer
{Monaural)
I acautiopTI
If you wish to bridge-connect a speaker, such as a subwoofer, as shown above, the speaker
impedance must be no less than 4 ohms.
Connecting a speaker with an impedance lower than 4 ohms may damage the unit.
English 5
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