User manual DLS ULTIMATE A5

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Manual abstract: user guide DLS ULTIMATE A5

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[. . . ] Contents How to install and operate the DLS ULTIMATE A-series amplifiers A1, A2, A3, A4, A5, A6, A7 & A8 Welcome! This owners manual is written in easy english and uses a lot of drawings to simply the installation and use of the above amplifiers. Your DLS amplifier must be installed correctly in order to work well. This manual will show you how to install the amplifier like a pro. Please read the entire manual before beginning the installation. [. . . ] A normal x-over setting is 3-4 kHz when used for active crossover in a 2-way system. If you run a 3-way system on the amplifier you can use this filter for active crossover between midbass and midrange speakers. A typical setting is 400 Hz. Input Front Rear x1 HP Front input to rear & sub Amplifier front Rear input to sub Input Sub Sub input separate LP x1 x 10 Amplifier front Rear input to sub Input Sub Sub input separate x 20 Sub input from rear LP x10 swith under the bottom plate LP x 10 Sub input from rear Highpass filter on rear channels This HP-filter is normally used as a high pass filter blocking very low frequencies from reaching the speakers. It is mostly used at say 80 Hz to protect small speakers ( like 6 inch and smaller ) from deep bass. The slope of the HP-filter is 12 dB / octave. The filter can be switched off if you want to run the amplifier in full range mode. Filters on sub channel Lowpass 90 HP-filter IN 240 50 125 Hz The sub channel is made only for subwoofer use and has a variable LP-filter that can be switched onoff. A normal setting for the LP-filter is 60-80 Hz. 80 400 Hz OUT 8 ULTIMATE A-series Professional Tip: Professional Tip: SPEAKER POLARITY CHECK. All speakers in a car audio system should be connected in phase (the same polarity). All speaker cones must move in the same direction. 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. Tap the + wire on to the + terminal of the battery, and observe the movement of the cone. The cone should move outwards when the wire touches the battery, and inwards when the battery is removed. If it is the other way around, the speaker has been connected backwards and it must be removed and connected correctly. If your system also has a subwoofer connected through a passive 6 or 12 dB crossover, try to connect this with various polarity and judge what sounds best. The phase shift in passive crossovers sometimes makes it necessary to change polarity. NOISE PROBLEMS WHINING NOISE VARYING WITH ENGINE REVOLUTIONS: Do this: 1. Rewire the power supply (12 V) to source unit direct from battery. Rewire ground wire from source unit to clean position on chassis. Check all power connections to ensure that they are clean and tight. Check quality of system ground connection. This can be helpful against most noise problems. Ensure that all equipment has a common ground point. Check quality of earth strap connection from battery negative terminal to chassis. [. . . ] To start the amplifier requires a remote voltage of 9-15 volt. AMPLIFIER PROTECTION FUSE BLOWS AT LOW VOLUME : 1. Make an insulation test with a multi meter. The cables must not have a connection to earth. [. . . ]

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