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Kenwood KAC-648 manual

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Table of contents for the manual

  • Page 1

    KA C-648 4-CHANNEL POWER AMPLIFIER INSTR UCTION MANU AL B64-1364-00 (EM)[...]

  • Page 2

    2 Saf ety pr ecautions Pr ot ection function 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. ■ Power indicator: When the power is turned on, the P[...]

  • Page 3

    3 Installation pr ocedur e 1. Remove the ignition key and disconnect the negative - terminal of the battery to prevent short circuits. 2. Set the unit according to the intended usage. 3. Connect the input and output cables of the units. 4. Connect the speaker cables. 5. Connect the power cable, power control cable and grounding cable following this[...]

  • Page 4

    1 Fuse (25 A × 1) 2 Battery terminal 3 Ground terminal 4 Power control (REMOTE) terminal 5 Amplifier A speaker output terminals 6 Amplifier B speaker output terminals ❖ SPEAKER OUTPUT terminals • Stereo Connections: When you wish to use the unit as a stereo amplifier, stereo connections are used. The speakers to be connected should have an imp[...]

  • Page 5

    ! LINE OUT terminal These jacks output respectively the signals input to amplifiers A and B. They always output the stereo signals regardless of the position of the OPERATION switch. @ RCA cable ground lead terminal # INPUT SENSITIVITY control Set this control according to the pre-output level of the center unit connected with this unit, or to the [...]

  • Page 6

    L R L R L R LINE OUT A B BRIDGED BRIDGED INPUT SENSITIVITY(V) CONTROL OPERATION B CONTROL A (Lch) MONO MAX MIN 0.3 0.5 1.0 STEREO INPUT SENSITIVITY(V) MAX MIN 0.3 0.5 1.0 INPUT SELECTOR A A B LPF OFF FILTER HPF OPERATION MONO(Lch) STEREO LPF OFF FILTER HPF L R L L R L R L R L R L R LINE OUT A B C L C INPUT SENSITIVITY(V) CONTROL OPERATION B CONTROL[...]

  • Page 7

    7 Connection A B A B SPEAKER LEVEL INPUT R L LEFT RIGHT SPEAKER LEVEL INPUT LEFT BRIDGED RIGHT A B SPEAKER OUTPUT POWER IN FUSE(25A) BATT P.CON(REMOTE) GND 25 ■ Power cable connection To prevent fire caused by a short in the wiring, connect a fusible link or breaker nearby the battery’s positive terminal. 2 WARNING Terminal cover Battery Ground[...]

  • Page 8

    8 A B A B SPEAKER LEVEL INPUT R L LEFT RIGHT SPEAKER LEVEL INPUT LEFT BRIDGED RIGHT A B SPEAKER OUTPUT POWER IN FUSE(25A) BATT P.CON(REMOTE) GND 25 L E F T BRIDGED R IG H T A B BRIDGED R L A B A B SPEAKER LEVEL INPUT R L LEFT RIGHT SPEAKER LEVEL INPUT LEFT BRIDGED RIGHT A B SPEAKER OUTPUT POWER IN FUSE(25A) BATT P.CON(REMOTE) GND 25 L E F T BRIDGED[...]

  • Page 9

    9 LINE OUT INPUT SENSITIVITY(V) CONTROL OPERATION 4 CHANNEL POWER AMPLIFIER L R B LPF OFF FILTER HPF B A (Lch) MONO MAX MIN 0.3 0.5 1.0 STEREO + INPUT SENSITIVITY(V) MAX MIN 0.3 0.5 1.0 CONTROL INPUT SELECTOR L A A A B GND MONO R LINE IN A B LPF OFF FILTER HPF OPERATION MONO(Lch) STEREO G N D ■ RCA cable connection Do not connect cables and leads[...]

  • Page 10

    10 A B A B SPEAKER LEVEL INPUT R L LEFT RIGHT SPEAKER LEVEL INPUT LEFT BRIDGED RIGHT A B SPEAKER OUTPUT POWER IN FUSE(25A) BATT P.CON(REMOTE) GND 25 LE F T R IG H T SPEAKER LEVEL INPUT • The genuine-accessory car stereo shall have a maximum power output of no more than 25 W. • Do not connect the speaker output leads from a power amplifier (Opti[...]

  • Page 11

    11 T r oubleshooting Guide What might appear to be a malfunction in your unit may just be the result of slight misoperation or miswiring. Before calling service, first check the following table for possible problems. PROBLEM POSSIBLE CAUSE SOLUTION No sound. (No sound from one side.) The output level is too small (or too large). The sound quality i[...]

  • Page 12

    12 Specifications Specifications subject to change without notice. Audio Section Max Power Output (4 Ω ) 4 Channel Mode ................................................................................................................. 50 W × 4 3 Channel Mode .........................................................................................[...]