User manual JL AUDIO 1000-1

[. . . ] JL AUDIO 1000/1 monoblock subwoofer amplifier o w n e r 's m a n u a l Thank you for purchasing a JL Audio amplifier for your automotive sound system. Your amplifier has been designed and manufactured to exacting standards in order to ensure years of musical enjoyment in your vehicle. For maximum performance and extended warranty coverage, we highly recommend that you have your new amplifier installed by an authorized JL Audio dealer. Your authorized dealer has the training, expertise and installation equipment to ensure optimum performance from this product. [. . . ] Lower numbers pertain to wider bandwidths while higher number pertain to narrower bandwidths. The "Center Freq. " control selects the center frequency of the boost bandwidth within a range of 20 - 80 Hz. If you would like to select the filter frequency with a higher level of precision, consult Appendix A: Chart A-4 (page 13) of this manual. The "Boost" control determines how much boost (in dB) you are adding to the bass signal. A range of 0 - 15dB of boost is available. The "Remote Bass Port" allows the connection of an optional remote boost knob (the RBC-1) that can be mounted in the front of the vehicle. This optional control takes the place of the "Boost" knob on the amplifier when connected and bypasses the "Boost" control on the amplifier. !I M P O RTA N T The "Advanced Bass Control" section will only operate when the amplifier's filter is activated with the "Amp LP Filter" switch in the "12dB" or "24dB" position. It will not work with this switch in the "Off" position. This is to prevent cascading the processing of multiple amplifiers when configured in a master/slave arrangement as shown in Appendix C (page 16). If you are using an external active crossover and would like to use the "Advanced Bass Control" features, set the "Amp LP Filter" switch on "12dB" and rotate the frequency selection knob fully clockwise to the "200 Hz" position. This will activate the "LF Boost" and "Infrasonic Filter" controls without significantly affecting the crossover point selected by the external active crossover. 1) "Infrasonic Filter": The infrasonic filter is a 24 dB/octave high-pass filter, with a fully variable cutoff frequency between 15 - 60 Hz. When set at frequencies lower than 30 Hz, it conserves amplifier power without audibly affecting the quality of the sub-bass output. If set at frequencies higher that 30 Hz, there will be an audible effect, but one which may be desirable for SPL competition purposes or curve shaping of a bottom-heavy system. With ported enclosures, the use of the infrasonic filter is highly recommended to protect the speaker(s) from excessive excursion below box tuning. With sealed enclosures, the use of the filter is less necessary, but can still help protect the speaker system. JL AUDIO 1000/1 8 JL AUDIO 1000/1 9 SUBWOOFER OUTPUT The 1000/1 employs JL Audio's exclusive Regulated, Intelligent Power Supply (R. I. P. S. ) design. This sophisticated power supply allows the amplifier to produce its optimum power (1000 watts x 1) over a wide range of speaker impedances. Unlike conventional amplifiers that require a specific impedance to produce optimum power, the R. I. P. S. -equipped 1000/1 gives you the freedom to use a variety of subwoofer configurations that achieve final nominal impedances between 1. 5 ­ 4 (without sacrificing power output or sound quality). circuitry is entirely automatic and adjusts itself every time the amplifier is turned on according to the lowest impedance present at the speaker load. There are no user controls to configure. The system operates through multiple stages of impedance optimization, choosing the stage most appropriate to the actual impedance of the speaker(s) you connect to it. connections. This is to facilitate multiple speaker wiring. The two positive and two negative connections are connected in parallel inside the amplifier. Connecting two speakers, each to one set of positive and negative terminals, will result in a parallel speaker connection. If only connecting one pair of speaker wires, it is not necessary to use both sets of connections. Do not chassis ground any speakers connected to this or any other JL Audio amplifier. Doing so will cause the amplifier to go into protection and mute the output. The 1000/1's speaker connectors are designed to accept 12 AWG ­ 8 AWG wire. To connect the speaker wires to the amplifier, first back out the set screws on the top of the amplifier, using the supplied 2. 5 mm hex wrench. [. . . ] 5-volts or more should be measured at the speaker outputs. This output level can vary greatly between amplifiers but it should not be in the millivolt range with the source unit at half volume. If you are reading sufficient voltage, check your speaker connections as explained above. (continued on next page) 18 JL AUDIO 1000/1 JL AUDIO 1000/1 19 APPENDIX D: TROUBLE SHOOTING (CONT. ) APPENDIX E: 1000/1 Specifications GENERAL SPECIFICATIONS: Recommended Fuse Value: 100A Recommended Fuse Type: ANL INPUT SECTION: Input Type: Differential-balanced with RCA jack inputs Input Range: Switchable from 200mV - 2V RMS to 800mV - 8V RMS ADVANCED BASS CONTROL SECTION: Parametric EQ: Single-band, fully parametric equalizer with "Q" adjustment from 0. 5 - 4. 0, center frequency adjustment from 20 - 80 Hz, boost adjustment from 0 to +15 dB and port for optional remote bass boost control (RBC-1), defeatable Infrasonic Filter: Fully variable, 24 dB/octave Butterworth high-pass filter, cutoff frequency adjustable from 15 - 60 Hz, defeatable "MY AMPLIFIER'S OUTPUT FLUCTUATES WHEN I TAP ON IT OR HIT A BUMP" Check the connections to the amplifier. Make sure that the insulation for all wires has been stripped back far enough to allow a good contact area inside the amplifier terminal. 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