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Hersteller: MB QUART Dateigröße: 1.98 mb Dateiname: Unterrichtssprache:

Hiss, or white noise 1 - High levels of white noise usually occurs when amplifier level controls are turned up too high - readjust according to the procedures in section ”Setting up systems after installation for best performance” 2 - Another major problem that can cause excessive hiss, is a noisy head unit - unplug the amplifier input RCA cables, and if the hiss level reduces, the source unit is at fault. Electrical interference The inside of an automobile is a very hostile electrical environment. The multitude of electrical systems, such as the ignition system, alternator, fuel pumps, air conditioners, to mention just a few, create radiated electrical fields, as well as noise on the +12 volt supply and ground. Remember to isolate the problem - first unplug amplifier input RCA cables, if the noise is still present, check the speaker leads, if not, plug the RCA’s back, and investigate the source driving the amplifier, one component at a time. A ticking or whine that changes with engine RPM: 1 - This problem could be caused by radiation pickup of RCA cables too near to a fuel pump or a distributor, for instance, - relocate cables. 2 - Check that the head unit ground is connected straight to the vehicle chassis, and does not use factory wiring for ground. 3 - Try to supply the head unit with a clean +12 volt supply directly from the battery +, instead of using a supply from the in dash wiring/fusebox. A constant whine: This type of noise can be more difficult to pinpoint, but is usually caused by some kind of instability, causing oscillations in the system. 1 - Check all connections, especially for good grounds. 2 - Make sure that no speaker leads are shorting to exposed metal on the vehicle chassis. 3 -RCA cables are notorious for their problematic nature, so check that these are good, in particular the shield connections. 2-Channel Amplifiers FX2.60 5 OUTPUT INPUT L R 6V 0.2V 0dB 9dB 30Hz 150Hz 10Hz 1.2kHz FULL HP LP LEVEL BASS EQ HIGH PASS LOW PASS X-OVER POWER PROTECTION FEATURES: - 1 Set of RCA inputs - LEVEL: Variable sensitivity from 0.2V to 6V - BASS EQ: Adjustable 45Hz bass boost from 0dB to 9dB - X-OVER: Selects internal crossover functions - FULL: Bypasses all crossovers for full frequency operation - LPF: Selects the built in LOW PASS filter, variable from 30Hz to 150Hz - HPF: Selects the built in HIGH PASS filter, variable from 10Hz to 1.2kHz - POWER LED: Indicates the powered up and turned on condition - PROTECTION LED: Indicates a high voltage, low voltage, short circuit, hard clip, over heating or DC fault condition.. - LINE OUTPUT: Full range RCA pass through. 2 Channel Full Range Stereo: Interconnect cable checklist: Control checklist: - Connect the two inputs of the amplifier to a Radio/CD with quality RCA cables. - Refer to the section “Settings for Best Performance” Switch setting checklist: - 1/2CH X-OVER: FULL Minimum final loudspeaker impedances: Mono Operation: - You can also feed the SAME signal to both left and right inputs via a Y-adapter RCA cable. - Connect the mono speaker positive terminal to the RIGHT +, and its negative terminal to LEFT Here we show how to use the 2 channel amplifiers as a 1 channel unit by taking - as shown. advantage of the mono bridging capability of all MB Quart amplifiers. Interconnect cable checklist: Switch setting checklist: - A MONO signal source is required to bridge channels 1/2, such as would be available - X-OVER: LP/BP from the mono sub bass output of an active crossover, whether standalone, or built into a head unit or equalizer. If you only have 1 set of RCA outputs from your headunit, you Control checklist: can simply connect those to the inputs for ch 1/2 and switch the X-OVER to LP/BP. The - Refer to the section “Settings for Best Performance” amplifier will auto sum the signal and provide mono output for bridged channels 1/2. Minimum final loudspeaker impedances: Important: Do not be tempted to connect the hot, or positive outputs, from any source - 4 ohm mono bridged. together to obtain a mono signal, as this could very well damage the output stage of that source. POWER INPUT POWER INPUT GND REM BA TT+12V GND REM BA TT+12V RIGHT LEFT RIGHT LEFT - + - + - + - + BRIDGED BRIDGED FUSE FUSE OUTPUT INPUT R L 6V 0.2V 0dB 9dB 30Hz 150Hz 10Hz 1.2kHz FUL HP LP LEVEL BAS EQ HIGH P ASS LOW P ASS X-OVER POWER PROTECTION OUTPUT INPUT R L 6V 0.2V 0dB 9dB 30Hz 150Hz 10Hz 1.2kHz FUL HP LP LEVEL BAS EQ HIGH P ASS LOW P ASS X-OVER POWER PROTECTION MONO LINE INPUT 4-Channel Amplifiers FX4.50 / FX4.70 / FX4.100 6 FEATURES: - 2 Sets of RCA inputs - LEVEL: Variable sensitivity from ...

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