User manual KENWOOD KAC-746

[. . . ] · Do not touch the unit during use because the surface of the unit becomes hot and may cause burns if touched. · Do not open the top or bottom cover. · Do not install the unit in places it is exposed to direct sunlight, high heat or humidity, water may splash over it, or dust exists. NOTE · If you have difficulty in installing this unit in your vehicle, contact your Kenwood dealer. Cleaning the unit · If the surface is dirty, wipe it clean with a silicon cloth or soft dry cloth with the power off. 2CAUTION Do not use hard cloths or paint thinner, alcohol, or other volatile solvents. These may damage external surfaces or remove indicator characters. 2CAUTION Take the following precautions to keep the unit in proper working order. · Be sure the unit is connected to a 12V DC power supply with a negative ground connection. Accessories Part name Battery cable (Yellow) (6 m) Ground cable (Black) (1 m) Self-tapping screws (ø4 × 16 mm) Terminal cover (Power terminal) External View Number of Items 1 1 4 1 Part name Round terminal (Large) Round terminal (Medium) Round terminal (Small) Grommets External View Number of Items 1 2 1 1 2 Installation procedure 1. [. . . ] This unit is compatible with a large variety of systems by combining the switches and functions described in the following. 1 FUSE(30A) POWER IN 5 BRIDGED GND BATT P. CON(REMOTE) SPEAKER OUTPUT BRIDGED A A B L R B LEFT RIGHT SPEAKER LEVEL INPUT LEFT RIGHT A SPEAKER LEVEL INPUT A B B L R 234 8 9 0 !@ 100 80 150 100 80 6 7 INPUT SENSITIVITY(V) 0. 5 0. 3 GND MONO L A LINE IN B A+B L LINE OUT INPUT SENSITIVITY(V) 0. 5 1. 0 0. 3 FILTER OPERATION 1. 0 MIN STEREO MONO(Lch) L+R MAX OPERATION R AB A R FILTER OFF HPF LPF 100 80 80 150 100 150 OFF HPF LPF 50 LPF 200 50 HPF 200 150 50 LPF 200 50 HPF 200 4 CHANNEL POWER AMPLIFIER MIN MAX STEREO MONO(Lch) L+R FREQUENCY(Hz) FREQUENCY(Hz) CONTROL A INPUT SELECTOR CONTROL B Amplifier A # $ %^ Amplifier B 1 Fuse (30 A) 2 Battery terminal 3 Ground terminal 4 Power control (REMOTE) terminal 5 Amplifier A speaker output terminals 6 Amplifier B speaker output terminals 7 Speaker level input terminals 8 FREQUENCY control When the FILTER switch is set to the HPF (High-Pass Filter) or LPF (Low-Pass Filter) position, the threshold frequency can be adjusted with this control. 9 FILTER switch High-pass or low-pass filtering can be applied to the speaker output according to the setting of this switch. 0 OPERATION switch The amplification methods of the signals input to amplifiers A and B can be selected independently according to the setting of this switch. 4 · STEREO position: The amplifier can be used as a stereo amplifier. · L+R position: The input left and right signals are combined before being amplified. Use this position when the unit is used for subwoofer speakers or the L+R (monaural) sound is required. · 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. 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 genuineaccessory car stereo. NOTE For the pre-output level or the maximum power output, refer to the "Specifications" in the instruction manual of the center unit. 25 10 15 0. 5 0. 3 1. 0 MIN (W) MAX @ RCA cable ground lead terminal # INPUT SELECTOR switch This switch selects the input method of the signals to be amplified by amplifiers A and B. · A B position: Amplifies both of the signals input to amplifiers A and B. · A position: Amplifies only signal input amplifier A with both amplifiers A and B. $ Amplifier A LINE IN terminal % Amplifier B LINE IN terminal ^ 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. Protection 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. s 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. Power indicator s The protection function activates in the following situations: · When a speaker output contacts ground. · When the unit malfunctions and a DC signal is sent to the speaker output. · When the temperature of internal parts exceeds 120°C (248°F). · When a ground cable 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. 5 Connection sRCA cable connection BLINE IN (Rear) CENTER UNIT (Cassette receiver, CD receiver, etc. ) Power control cable POWER IN 2CAUTION Do not connect cables and leads to both RCA cable input jacks and the speaker input terminals simultaneously, for this may cause malfunction or damage. ALINE IN (Front) RCA cable (Commercially available part) GND BATT P. CON(REMOTE) A Left input (White) INPUT SENSITIVITY(V) 0. 5 0. 3 1. 0 MAX B Left input (White) GND MONO L A LINE IN B A {B L LINE OUT INPUT SENSITIVITY(V) 0. 5 0. 3 100 80 100 80 150 FILTER OPERATION 1. 0 MIN STEREO MONO(Lch) L {R OPERATION R AB A R FILTER OFF HPF LPF 100 80 80 150 100 150 OFF HPF LPF 50 LPF 200 50 HPF 200 150 50 LPF 200 50 HPF 200 4 CHANNEL POWER AMPLIFIER MIN MAX STEREO MONO(Lch) L {R FREQUENCY(Hz) FREQUENCY(Hz) CONTROL A INPUT SELECTOR CONTROL B A Right input (Red) B Right input (Red) RCA cable ground terminal 2CAUTION When using an RCA cable with Do not use this terminal for power source a ground lead attached, connect grounding. [. . . ] · Check connections by referring to "Protection function". · Connect them properly checking the + / - of the terminals and cables well. · Connect the speaker cable again so that it is not pinched by anything. [. . . ]