User manual DLS RA50

[. . . ] Contents Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Amplifier installation kit. . . . . . . . . . . . . . . . Routing Wires. . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] The filter configuration on the respective channels can be found in the technical specifications. Filters on CH 1 and CH2 High Pass Filter The HP-filter ( high pass filter ) blocks very low frequencies from reaching the speakers. It is mostly used at say 60 Hz to protect small speakers ( like 6 inch and smaller ) from deep bass. HP-filter FREQUENCY 50 140 Hz CH1 and CH2 include high pass filter (HP) and low pass filter (LP). The slope of the filters are 12 dB / octave. The filters can be switched off if you want to run the amplifier in full range mode. The LP-filter can be used in two different frequency ranges by changing a switch in the bottom plate of the amplifer. The switch has two positions giving the following frequency ranges: x1 = 250 - 700 Hz x10 = 2, 5 kHz - 7 kHz The LP-filter is used when running a 2- or 3-way system in active mode. CH1 CH2 LP filter Frequency selector Switches in bottom plate x1 250 - 700 Hz x10 2, 5 - 7 kHz Low Pass Filter The LP-filter ( low pass filter) is mostly used for subwoofers. It will allow low frequencies only and blocks higher frequencies. The LP-filter on ch 1&2 has another frequency range used for other applications. LP-filter FREQUENCY 40 125 Hz The HP-filter is adjustable between 50 - 140 Hz. It blocks very low frequencies from reaching the speakers. It is mostly used at say 60 Hz to protect small speakers ( like 6 inch and smaller ) from deep bass. Subsonic filter The subsonic filter is used to take away the very deepest frequencies from a bass box. The x-over frequency is 25 Hz. IN OUT 7 RA50 Filters on CH 3 and CH4 Filters on CH 5, sub channel CH3 and CH4 include high pass filter (HP). The slope of the filter is 12 dB / octave. The filter can be switched off if you want to run the amplifier in full range mode. The HP-filter can be used in three different frequency ranges by changing a switch in the bottom plate of the amplifer. The switch has three positions giving the following frequency ranges: x1 = 50 - 140 Hz x5 = 250 Hz - 700 Hz x50 = 2, 5 kHz - 7 kHz The HP-filter is used when running a 2- or 3-way system in active mode. x1 50 -140 Hz x5 250 - 700 Hz x50 2, 5 - 7, 0 kHz CH3 CH4 HP filter Frequency selector Remote Bass level and phase control box The amplifier includes a remote control unit. With this unit it is possible to adjust the bass level and phase on the subwoofer channel (CH5), from the front seat. Connect the cable between the amplifier socket and the socket on the remote box. CH5 include low pass filter (LP) and subsonic filter. The slope of the LP-filter is 12 dB / octave and 18 dB for the subsonic filter. The subsonic filter can be switched off if you dont want any limitation in the lower frequency range. The LP-filter allows low frequencies only and blocks higher frequencies. [. . . ] 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. [. . . ]