User manual KENWOOD KAC-816

[. . . ] · 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. [. . . ] Otherwise malfunction may result. 6 SIGMA SERVO FEED BACK terminals (See p. 8) 2CAUTION Be sure to make proper connections to the SIGMA SERVO FEED BACK terminals. Incorrect connection may result in lack of sound output or other malfunctions. 7 INFRASONIC FILTER switch Ultralow frequencies that cannot be reproduced even by a subwoofer speaker do not become sound but become unnecessary oscillations, which affect the sound by causing distortion, etc. Setting this switch to "15 Hz" or "25 Hz" cuts the frequencies below the respective frequency. This improves the reproduction performance of the speakers by eliminating unnecessary oscillations which will not become sound. 8 LOW PASS FILTER FREQUENCY control This control adjusts the frequency band output from this unit. 9 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. NOTE For the pre-output level or the maximum power output, refer to the "Specifications" in the instruction manual of the center unit. 15 10 0. 5 1 2 3 4 0. 3 25 5 (V) 0. 2 (W) 4 0 RCA cable ground lead terminal !LINE IN terminal @ Speaker level input terminals Power indicator 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 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. · The temperature of the internal parts may be higher than 120°C (248°F). · The unit may be malfunctioning and sending DC signal to the speaker output. · The grounding cable of this unit may not be connected with a metallic part which is electrically connected with the negative terminal of the battery. · The grounding cable of the center unit (cassette receiver, CD receiver, etc. ) may not be connected with a metallic part which is electrically connected with the negative terminal of the battery. 5 Connection s RCA cable connection 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. Left input 15Hz OFF 25Hz INFRASONIC Left output (White) Right output (Red) CENTER UNIT (Cassette receiver, CD receiver, etc. ) RCA cable (Commercially available part) Right input Power control cable (Commercially available part) LPF INPUT FREQUENCY(Hz) SENSITIVITY(V) 100 70 50 200 150 1 2 3 4 0. 5 0. 3 LINE IN L GND R SPEAKER LEVEL INPUT LEFT RIGHT 5 0. 2 MONO POWER AMPLIFIER 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. [. . . ] · If the Sigma servo terminals are not connected, the sound may fluctuate or noise may occur. · When connecting speakers in a parallel configuration, use speakers with an impedance of 4 ohms or more. Connecting speakers with smaller impedance than 4 ohms will cause malfunction. [. . . ]