Harman Kardon CA260 Owners Manual - Page 7

Caution# 1: The ignition key switch should be turned off before any connections are made to the car electrical system. Caution#2: The last connection to be made should be that between the positive terminal of the car battery and the " + B" terminal on the CA260. Connect the CA260 to the car electrical system and to the other components in the audio system as per the following ~nstructions: Remote This terminal enables the power switch of the car stereo or tunerldeck to also turn on the CA260. Connect it to the appropriate wire on the car stereo or tunerldeck If a specific wire for this purpose is not provided, use the wire for controlling the power antenna. If that wire is already connected to the power antenna, the CA260 can be connected In addition Should no power antenna wire be provided, an SPST (Single-Pole. SingleThrow) switch and a pair of wires can be connected between the remote terminal and the " + B" terminal. When the switch is closed, the CA260 will turn on. +B + The B terminal is the positive power input terminal. It should be connect- ed to the positive ( + ) terminal of the car battery by the enclosed 1 2 gauge wire or an equivalent type. It is good practice t o add a line fuse near the battery terminal to protect the battery from a short circuit along the wire. GND This is the negative power input terminal It should be connected directly t o the car chassis by a short, heavy gauge wire. It is not necessary t o connect this terminal to the negative battery terminal. Speaker Systems For a conventional stereo system with one or t w o speaker systems per channel, connect the speaker systems t o these termlnals Be careful to connect the positive speaker terminals to the positive CA260 terminals. Do not connect the negative speaker terminals to the car chassis When one pair of speakers is used, each one may have an impedance in - the range of 2 8 Ohms and a power rating of at least 6 0 watts If t w o palrs - of speakers are used, each one may have an impedance in the range of 4 8 Ohms and a power rating of at least 45 watts. High Level lnput These input terminals are only to be used when connecting a car stereo unit that has a built-ln amplifier and does not have lme level (or preamp level) output jacks (or wires). Connect the output wires that would normally be connected to the speakers to these terminals. Be careful to connect the car stereo's positive output wires to the CA260's positive input terminals If the car stereo's negative output wires are actually ground wires, they can be twisted together and connected to the CA260's high level negative ( terminal. However, if the car stereo unit has a power rating of more than 8 watts per channel (with low distortion), it is likely that its negative output wires are not actually ground wires, but instead are "live." In this case, do not connect these wires to the CA260 at all. Instead, connect a wire from the chassis of the car stereo unit to the CA260's negative high level input terminal. If electrical noise results from this connection method, contact the Harman Kardon service department for a special bulletin regarding this matter. Note: The line Input sensitivity switch must be set to the "low" position when the h ~ g hlevel lnput termlnals are connected Line Level lnput Jacks These input terminals are for connection to the line level (or preamp) output jacks on the car stereo or tunerldeck It is recommended that hlgh quality shielded coaxial cables with tight-fitting RCA plugs be used for this connection. Line lnput Sensitivity Switch This switch matches the line input sensitivity of the CA260 to the line output level of the car stereo or tunerldeck. If the rated output level is equal to or more than 0 . 8 volts (800 millivolts), set this switch in the "low" position. Otherwise, set it in the "high" position. If the line output level of the car stereo or tunerldeck is not known, assume that it is more than 0 . 8 volts. When operating the total system, if it is necessary to turn the volume control of the car stereo or tunerldeck to maximum in order to obtain a desired listening level, then the line output level is likely to be less than 0.8 volts, and the line input sensitivity switch should be put in the "high" position.