User manual BOSS CAM20

[. . . ] The cables must not have a connection to earth. Amplifier location Important Allow air circulation around the amplifier. The BOSS Classic series of amplifiers have a compact design that allows great flexibility in mounting. When you select a location, do remember that the amplifier generates a lot of heat. Choose a location where air can circulate freely around the amplifier. [. . . ] Amplifier installation kit: If available, buy an amplifier installation kit. This is what you have to buy if you buy the items separately 20- 25 feet = 6- 7. 5 meter power cable, minimum AWG 5 = 16 mm2 or heavier. 1 pc of fuseholder to install close to the car battery + fuse 60 Ampere. 20 feet of AWG 15 = 1, 5 mm2 wire for remote turn on / off cable from radio. - 20 feet or 5 meter for trunk installations -12 feet or 2 ­ 3 meter for under seat installations Two ring crimp terminals ­one for connection to the battery plus and one for the amplifier ground connection. Two heavy fork crimp terminals to connect + and ­ to amplifer ­ but you do only need them if you use heavy cable or to make the installation look nicer. Four to eight fork crimp terminals to connect the speaker cables ­ but you do only need them if you use heavy cables or want the installation to look nicer. One fork crimp terminal to connect the remote wire to the amplifier, but you need it only to make it look nicer. Four to eight splicers to connect speaker cables to high level input cable, if high level input is used. Wire ties Insulating grommet or insulating tube Routing wires Stereo head unit High current draw The CAM20 is a mono amplifier with high power output. The current draw is also high so you must make sure that your vehicles power system (battery and alternator) can provide all the power you need. Most trunk-mount amplifiers need a 20 feet RCA cable ( appr 5 ­ 6 meters). Most under the seat installations require 12 feet ( 2 ­ 3 meters) RCA cables. Avoid placing the RCA cable close to speaker cables, power cables and remote control cable. High Level Input Connect left and right speaker wires coming from the car stereo to the high level input as shown. You must connect both plus and minus as the inputs are balanced, connecting plus only gives lower level and bad sound quality. By changing the polarity of plus and minus, you can change the phase. High Input White White/Black Grey/Black Grey : A ch. + : A ch. : B ch. : Bch. + Input Level control The input level control, 5V ­ 0, 25 V, matches the output of your radio to the input of the amplifier. After installation is complete, make sure the input of the amplifier is turned down all the way ( counterclockwise at 5V ). Play a tape or CD, make sure all bass or treble settings or equalizer are flat, and turn the volume of the radio up until you just start to hear distortion. On the amplifier increase the input level control ( clockwise or to the right ) until you just start to hear distortion, then back the level control just a bit. Now your radio and amplifier levels are matched. Level 5V 0, 25 V Subsonic filter The Subsonic filter blocks the very deepest frequencies from reaching the subwoofers. A typical setting is 25-30 Hz when used with subwoofers. The filter can be switched IN-OUT. Subsonic 40Hz 100Hz 15Hz 150Hz Off On Hi level input plug on amp. Low Pass Filter The LPF ( low pass filter ) mostly used for subwoofers. [. . . ] If noise remains regardless of cable position, try to use so called Quasi-balanced signal cables. BOSS PRO or ULTIMATE cables are quasibalanced. Professional Tip: SPEAKER POLARITY CHECK. All speakers in a car audio system should be connected in phase (the same polarity). Out of phase speakers will cause a lack of bass, and a poor stereo soundstage. Checking polarity: Hold the - connection of the speaker wire to the terminal of a 1, 5 Volt flashlight battery. [. . . ]