Kenwood KAC-648 User Manual - Page 6
CENTER UNIT, Coil L, Capacitor C
View all Kenwood KAC-648 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 6 highlights
System examples s High-pass + Subwoofer system INPUT SELECTOR AB A FILTER OPERATION OFF HPF LPF STEREO MONO(Lch) CONTROL A CONTROL B FILTER OPERATION OFF (Lch) HPF LPF STEREO MONO 1.0 0.5 0.3 MIN MAX INPUT SENSITIVITY(V) 1.0 0.5 0.3 MIN MAX INPUT SENSITIVITY(V) CENTER UNIT Switch setting s High-power 2-channel system LA L R R L RB L LINE R OUT BRIDGED (High pass) Subwoofer (L + R) (Bridged) BRIDGED BRIDGED INPUT SELECTOR AB A FILTER OPERATION OFF HPF LPF STEREO MONO(Lch) CONTROL A CONTROL B FILTER OPERATION OFF (Lch) HPF LPF STEREO MONO 1.0 0.5 0.3 MIN MAX INPUT SENSITIVITY(V) 1.0 0.5 0.3 MIN MAX INPUT SENSITIVITY(V) CENTER UNIT Switch setting L LA R L R RB L LINE R OUT Left speaker Right speaker s Tri-mode (High pass) INPUT SELECTOR AB A FILTER OPERATION OFF HPF LPF STEREO MONO(Lch) CONTROL A CONTROL B FILTER OPERATION OFF (Lch) HPF LPF STEREO MONO 1.0 0.5 0.3 MIN MAX INPUT SENSITIVITY(V) 1.0 0.5 0.3 MIN MAX INPUT SENSITIVITY(V) CENTER UNIT Switch setting C L LA L R R L RB C L L L LINE R OUT R Subwoofer (L + R) (Bridged) qPrinciple of Tri-mode Method of frequency band division using a coil and capacitor•••in case of 6dB/oct. slope 0 dB -3 dB Crossover Frequency Coil (L): Passes low frequencies and blocks high frequencies. (Low pass) Capacitor (C): Passes high frequencies and blocks low frequencies. (High pass) L qExample: C Frequency C= 159000 fc x R (µF) L= 159 x R fc (mH) fc=Cut of Frequency (Hz) R=Speaker Impedance (Ω) 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 (µF) and the coil rating should be as close as possible to 5.3 (mH). 2CAUTION • 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. 6