User manual MB QUART RAB 450

[. . . ] Any damage to the product as a result of misuse, abuse, accident, incorrect wiring, improper installation, alteration of date code or bar code labels, revolution, natural disaster, or any sneaky stuff because someone messed up, repair or alteration out side of our factory or authorised service centers and any thing else you have done that you should not have done is not covered. This warranty is limited to defective parts and specifically excludes any incidental or consequential damages connected therewith. This warranty is not to be construed as an insurance policy. Warranty on installation labor, removal, re-installation and freight charges are not the responsibility of Maxxsonics USA Inc. [. . . ] LP (LOW-PASS) will route those frequencies below the CROSSOVER FREQ SELECT controls to the internal amplifiers. The variable pot sets the crossover frequency point for both high and low pass. Note: Check your radio/CD player manual for the correct line level sensitivity and adjust the amplifier level control to match. This output can drive the input of other amplifiers in a system (daisy chain). LEFT and RIGHT inputs to the amplifier, from the radio/CD line level (RCA) source with a range of 0. Use a line converter if the radio/CD player has speaker (high level) outputs only. Note that in this case, channels 1 & 2 level will be set by the LEVEL CH3/4 control only, for an exact duplication of the 3 & 4 amplifier pair signal. This control is bypassed when CH1/2 is in DUPE 3/4 or FR (FULL RANGE) selection. Note that when the amps' CH1/2 select switch is in the DUPE CH3/4 position, the CH1/2 LEVEL control no longer af fects CH1/2. Having this per manently connected to the 3 & 4 pair, allows us to use it at any time, either as a subsonic, when set from 20Hz to 40Hz or as the lower or high pass cut off frequency control for active bandpass applications, in conjunction with the LOW PASS filter when the CH3/4 MODE switch is in the LOW PASS setting. Note that when the amps' CH1/2 select switch is in the DUPE CH3/4 position, the CH1/2 LEVEL control no longer af fects CH1/2. In the 2CH position, all four channels are provided signal from the CH1/2 RCA Inputs. In the 4CH position, channels 1/2 receive input from CH1/2 RCA inputs, and channels 3/4 receive input from CH3/4 RCA inputs. This output can drive the input of other amplifiers in a system (daisy chain). All 4 channels are mono mixed and then fed to both line out RCAs. This provides a front/rear mono signal for constant non-faded sub bass to feed a sub amp. Only CH 1&2 are mono mixed and fed to both line out RCAs. CH1-4 inputs to the amplifier, from the radio/CD line level (RCA) source with a range of 0. Use a line converter if the radio/CD player has speaker (high level) outputs only 3. Depending on your system layout, follow the input descriptions in section "Amplifier applications" of this manual. LP/BP (LOW PASS/BANDPASS) will route those frequencies above the HIGH PASS setting and below the LOW PASS setting to the internal amplifier. FR/HP (FULL RANGE/HIGH PASS) bypasses the LOW PASS setting and the frequencies reproduced are anything to above the HIGH PASS setting. [. . . ] 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. [. . . ]