Évaluations - 3, GPA: 3
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Facilité d'utilisation
7EXPANDER switch When this switch is turned ON the dynamic range is increased. 8LOW PASS FILTER switch These switches allow filtering of the speaker output signals. • OFF position: The entire bandwidth is output without filtering. • ON position: The filter outputs the band of lower frequencies than the frequency set with the LPF FREQUENCY control. 9OPERATION switch This switch allows selection of the amplification method of input signals. • STEREO position The amplifier can be used as a stereo amplifier. • MONO (Lch) position Amplifies the signal input from the left side only. Set to this position and make bridged connections to use as a high-power monaural amplifier. (The input right signal is not output.) 0LPF FREQUENCY control Sets the cutoff frequency when the LOW PASS FILTER switch is set to ON. !INPUT SENSITIVITY control Set this control according to the pre-output level of the center unit connected with this unit, or to the maximum power output of the genuine-accessory car stereo. Use the diagram on the right as a guide. For the pre-output level or the maximum power output, refer to the “Specifications” in the instruction manual of the center unit. @RCA cable ground lead terminal When using an RCA cable with a ground lead attached, connect the ground lead to this terminal. Do not use this terminal for power source grounding. This unit will be damaged if the power source grounding wire is connected to this terminal. #LINE IN terminal $Speaker level input terminals Power indicator When the power is turned on, the Power indicator lights. If the Power indicator does not light when the power is turned on, the protection function may be activated. Check whether there is any indication of trouble. ¦ The protection function is activated in the following situations: This unit is equipped with a protection function for protecting this unit and your speakers from various accidents or problems that can occur. When the protection function is triggered, the Power indicator goes off and the amplifier stops operating. • When a speaker wire may be short-circuited. • When a speaker output contacts ground. • When the unit malfunctions and a DC signal is sent to the speaker output. • When the internal temperature is high and unit won’t operate. • When a ground wire of the center unit (cassette receiver, CD receiver, etc.) or this unit is not connected to a metal part serving as an electrical ground passing electricity to the battery's negative -terminal. 2CAUTION NOTE Controls POWER AMPLIFIER LEFT SPEAKER BRIDGED OUTPUT RIGHT POWER IN P.CON BATT. GND 30 30 FUSE(30Ax2) ! OFF ON EXPANDER STEREO MONO(Lch) OPERATION OFF ON LOW PASS FILTER OFF 12dB 6dB BASS BOOST KAC-929 STEREO/BRIDGEABLE AMPLIFIER MAXIMUM POWER 1 2 3 4 5 0 ! @ # $ 6 7 8 9 (MIN)5 0.2(MAX) 0.3 0.5 1 2 3 4 SENSITIVITY(V) INPUT (W) 20 40 10 Power indicator Terminal cover Battery Battery wire* Ground wire* Protective Fuse* Power control wire* L ¦ Power wire connection R L R L C C 6 7 8 9 OFF ON EXPANDER STEREO MONO(Lch) OPERATION OFF ON LOW PASS FILTER OFF 12dB 6dB BASS BOOST Connection NOTE For safe installation, read "Installation procedure" before starting work. POWER AMPLIFIER LEFT SPEAKER BRIDGED OUTPUT RIGHT POWER IN P.CON BATT. GND 30 30 FUSE(30Ax2) POWER AMPLIFIER LEFT SPEAKER BRIDGED OUTPUT RIGHT POWER IN P.CON BATT. GND 30 30 FUSE(30Ax2) LEFT BRIDGED RIGHT LEFT BRIDGED RIGHT 4 5 5 4 GND @ CENTER UNIT (Cassette receiver, CD receiver, etc.) Power control wire* RCA cable* Genuine-accessory car stereo (No line output center unit etc.) ACC Battery Car fuse box Lead terminal* Subwoofer Lead terminal* Left speaker Right speaker ¦ 2-channel system ¦ 1-channel system ¦ Subwoofer system ¦ RCA cable connection ¦ Speaker level input connection ¦ Speaker stereo connection ¦ Speaker bridge connection CENTER UNIT CENTER UNIT CENTER UNIT ¦ Tri-mode Principle of Tri-mode Method of frequency band division using a coil and capacitor ... in case of 6dB/oct. slope Coil (L): Passes low frequencies and blocks high frequencies. (Low pass) Capacitor (C): Passes high frequencies and blocks low frequencies. (High pass) Example: When it is required to set a crossover frequency of 120 Hz using speakers with an impedance of 4 ohms. fc=Cut of Frequency (Hz) R=Speaker Impedance (.) • 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. 2CAUTION L C 0 dB -3 dB Crossover Frequency Frequency CENTER UNIT High pass Subwoofer (L + R) 159000 C= (.F) fc x R 159 x R L= (mH) fc 159000 = = 331.25 .F 120Hz x 4. 159 x 4. = = 5.3 mH 120Hz Left speaker Right speaker Left speaker Right speaker Left speaker Righ...