Kenwood KAC-746 User Manual - Page 8

System examples s Full-range 4-channel + Subwoofer system CENTER UNIT L L RA R L L B R R L A+B R LINE OUT Amplifier Switch setting 100 80 100 150 80 FILTER OPERATION 150 OFF HPF LPF 50 LPF 200 50 HPF 200 FREQUENCY(Hz) STEREO MONO(Lch) L+R CONTROL A AB A INPUT SELECTOR OPERATION FILTER 100 80 150 100 80 OFF 150 HPF LPF 50 LPF 200 50 HPF 200 STEREO MONO(Lch) L+R FREQUENCY(Hz) CONTROL B s High-power 2-channel system Switch setting CENTER UNIT L L RA R L L RB R L A+B R LINE OUT (Bridged) (Bridged) s High-pass (80 Hz) + Subwoofer(80 Hz) system 100 80 100 150 80 FILTER OPERATION 150 OFF HPF LPF 50 LPF 200 50 HPF 200 FREQUENCY(Hz) STEREO MONO(Lch) L+R CONTROL A AB A INPUT SELECTOR OPERATION FILTER 100 80 150 100 80 OFF 150 HPF LPF 50 LPF 200 50 HPF 200 STEREO MONO(Lch) L+R FREQUENCY(Hz) CONTROL B Switch setting CENTER UNIT s Tri-mode L L RA R L L B R R L A+B R LINE OUT (High pass) Subwoofer (L + R) (Bridged) 100 80 100 150 80 FILTER OPERATION 150 OFF HPF LPF 50 LPF 200 50 HPF 200 FREQUENCY(Hz) STEREO MONO(Lch) L+R CONTROL A AB A INPUT SELECTOR OPERATION FILTER 100 80 150 100 80 OFF 150 HPF LPF 50 LPF 200 50 HPF 200 STEREO MONO(Lch) L+R FREQUENCY(Hz) CONTROL B Switch setting CENTER UNIT L L RA R L L B R R L A+B R LINE OUT qPrinciple of Tri-mode C L C C L C 100 80 100 150 80 FILTER OPERATION 150 OFF HPF LPF 50 LPF 200 50 HPF 200 FREQUENCY(Hz) STEREO MONO(Lch) L+R CONTROL A AB A INPUT SELECTOR OPERATION FILTER 100 80 150 100 80 OFF 150 HPF LPF 50 LPF 200 50 HPF 200 STEREO MONO(Lch) L+R FREQUENCY(Hz) CONTROL B 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. 8