User manual KENWOOD KAC-PS401M

[. . . ] KAC-PS401M MONO POWER AMPLIFIER INSTRUCTION MANUAL © B64-1441-00 (EM) Safety precautions 2WARNING To prevent injury or fire, take the following precautions: · When extending the ignition, battery, or ground cables, make sure to use automotivegrade cables or other cables with a 5mm 2 (AWG10) or more to prevent cable deterioration and damage to the cable coating. · To prevent a short circuit, never put or leave any metallic objects (such as coins or metal tools) inside the unit. · If the unit starts to emit smoke or strange smells, turn off the power immediately and consult your Kenwood dealer. · Do not touch the unit during use because the surface of the unit becomes hot and may cause burns if touched. 2CAUTION · To prevent a short circuit when replacing a fuse, first disconnect the wiring harness. NOTE · If you experience problems during installation, consult your Kenwood dealer. [. . . ] If the power supply voltage returns to full after a voltage drop, this indicator will blink to alert the user that a voltage drop has occurred. The number of blinks indicates the number of times the voltage has dropped (up to a maximum of 10). · When the POWER indicator and the OPERATION/PROTECTION function both go out: · The fuse of this unit may be blown. · When the LOW VOLTAGE indicator glows or blinks: · Is the battery exhausted?· The car battery has a small capacity. · If the battery cable is too thin or too long, it will not be able to supply enough power. · Is the battery cable deteriorated? @2 B. M. S. indicator This indicator glows when the bass boost is turned ON using the B. M. S. (See P. 6). NOTE If indicators !9 to @2 light up in succession or blink in unison, the system is in DEMO mode. If this happens, cancel DEMO mode by pressing the OPEN/CLOSE button. English 5 B. M. S. (Bass Management System) B. M. S. B. M. S. FREQUENCY 1 2 LPF BAND REJECT INFRASONIC FREQ (Hz) COOLING FAN AIR INDUCTION OPERATION/PROTECTION P. CON EXT. AMP. CONT. 15 20 25 30 OFF ON OFF ON OFF ON OPEN/ B. M. S. Additionally, up to 3 power amplifiers can be set at the same time. NOTE Kenwood centre units released in 1999 or later having an "EXT. AMP. CONT. " cable operate this unit. Instructions on how to operate the centre unit will be found in the instruction manual supplied with the centre unit. 1 B. M. S. switch This switch is used to select the range of control operations that can be carried out from the centre unit. When the bass boost is switched ON, the B. M. S. FREQUENCY control This control allows you to use the B. M. S. to adjust the central frequency that you want to emphasise. 3 OPEN/CLOSE button · When the B. M. S. (+6) position, the slide panel will open or close each time the button is pressed. switch is set to the (REMOTE) position, the centre unit will control the slide panel. If you want to adjust the control inside the slide panel, you can open/close the slide panel temporarily by pressing the OPEN/CLOSE button. NOTE · (REMOTE) OPEN/CLOSE position: When the switch is in this position, only the opening/closing of the slide panel can be controlled from the centre unit; the bass cannot be boosted. AMP AMP AMP Centre unit BASS BASS BASS setting status Flat +6 +12 Bass boost Flat (OFF) Slide panel CLOSE OPEN · (REMOTE) B. M. S. position: When the switch is in this position, any of the three bass boost settings -- FLAT, +6dB and +12dB -- can be selected from the centre unit. If "+6 dB" or "+12 dB" is selected, the slide panel will open. [. . . ] · The rated input of the speakers connected to this unit should be no less than the maximum output of the amplifier. Be specially careful in this when connecting speakers in a parallel configuration. s Basic sigma servo connection s Series connection 2CAUTION Make this cable as short as possible. s Parallel connection (1) s Parallel connection (2) 2CAUTION The speaker cables connected to this unit should be thick enough to supply the current capacity of two speakers. 2CAUTION This connection is possible only when the speakers are identical and the speaker cables are also of the same type and length. s Simplified sigma servo connection In case any of the connection examples above cannot be used or if the speakers cannot be connected to the speaker terminals, connect them to this unit as shown in the figure. English 11 Connection The acoustic properties of vehicle compartment tend to cause oscillation due to resonance or unclearness of sound due to standing waves at certain frequencies. The band reject filter can solve the problems of resonance or unclear sound with minimum influence on the sound quality because it eliminates only the frequencies causing resonance or standing waves. 0 dB Frequency s Adjustment method: The band reject filter cuts only the limited frequencies to minimize influence on the sound quality. [. . . ]