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20 

 |  JL Audio - 1000/1

v2

 Owner’s Manual  

21

“my amplifier shuts off once in a while, usually at higher volumes”

 

Check  your voltage source and grounding point. The power supply 

of the 1000/1v2 will operate with charging system voltages 
down to 10V. Shutdown problems at higher volume levels 
can occur when the charging system voltage drops below 
10V. These dips can be of very short duration making them 
extremely difficult to detect with a common DC voltmeter. 
To ensure proper voltage, inspect all wiring and termination 
points. It may also be necessary to upgrade the ground 
wire connecting the battery to the vehicle’s chassis and the 
power wire connecting the alternator to the battery. Many 
vehicles employ small (10 AWG - 6 AWG) wire to ground the 
battery to the vehicle’s chassis and to connect the alternator to 
the battery. To prevent voltage drops, these wires should  be 
upgraded to 4 AWG when installing amplifier systems with 
main fuse ratings above 60A. Grounding problems are the 

leading cause of misdiagnosed amplifier “failures.”

“my amplifier turns on, but there is no output”

 

Check  the input signal using an AC voltmeter to measure the 

voltage from the source unit while an appropriate test tone is 
played through the source unit (disconnect the input cables 
from the amplifier prior to this test). The frequency used 
should be in the range that is to be amplified by the amplifier  
(example: 50 Hz for a sub bass application or 1 kHz for a full 
range / high-pass application).  A steady, sufficient voltage 
(between 200mV and 8.0-volts) should be present at the 
output of the signal cables. 

 

Check  the output of the amplifier. Using the procedure explained in 

the previous check item (after plugging the input cables back 
into the amplifier) test for output at the speaker outputs of 
the amplifier. Unless you enjoy test tones at high levels, it is 
a good idea to remove the speaker wires from the amplifier 
while doing this.  Turn the volume up approximately half 
way. 5V 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 below.

 

Check  to ensure that the speaker wires are making a good 

connection with the metal inside the terminal block.  The 
speaker wire connectors are designed to accept up to 8 AWG 
wire.  Make sure to strip the wire to allow for a sufficient 
connection with the metal inside the terminal block.

“How do i properly set the input sensitivity on my amplifier”

 

Please  refer to Appendix A (page 14) to set the input sensitivity for 

maximum, low-distortion output.

“my amplifier doesn’t turn on”

 

Check  the fuse, not just visually, but with a continuity meter. It is 

possible for a fuse to have poor internal connections that 
cannot be found by visual inspection. It is best to take the 
fuse out of the holder for testing. If no problem is found with 
the fuse, inspect the fuse-holder. 

 

Check  the integrity of the connections made to each of the 

+12VDC”,  “Ground”,  and “Remote” terminals. Ensure 
that no wire insulation is pinched by the terminal set screw 
and that each connection is tight. 

 

Check  to make sure there is +12V at the “Remote” connection of the 

amplifier. In some cases, the turn-on lead from the source unit 
is insufficient to turn on multiple devices and the use of a relay 
is required.  To test for this problem, jump the “+12VDC” wire 
to the “Remote” terminal to see if the amplifier turns on. 

 

“i get a distorted / attenuated sound coming out of the speaker(s)”

 

Check  the speaker wires for a possible short, either between the 

positive and negative leads or between either speaker lead 
and the vehicle’s chassis ground. If a short is present, you  
will experience distorted and/or attenuated output. The  
Low Ω” light will illuminate in this situation. It may be 
helpful to disconnect the speaker wires from the amplifier 
and use a different set of wires connected to a test speaker. 

 

Check  the nominal load impedance to verify that the amplifier 

is driving a load between 1.5 - 4Ω. JL Audio monoblock 
amplifiers have two “+” positive connections and two “–” 
negative 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. In this case,  
each of the two loads should have a nominal 
impedance between 3 - 8Ω.

 

Check  the input signal and input signal cables to make sure signal 

is present at the “Amplifier Inputs” and the cables are not 
pinched or loose. It may be helpful to try a different set of 
cables and/or a different signal source to be sure.

“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 terminal block. 

 

Check  the input connectors to ensure that they all are making good 

contact with the input jacks on the amplifier. 

aPPendix e:  trouble sHooting

Summary of Contents for 1000/1v2

Page 1: ...tise and installation equipment to ensure optimum performance from this product Should you decide to install the amplifier yourself please take the time to read this manual thoroughly so as to familiarize yourself with its installation requirements and setup procedures If you have any questions regarding the instructions in this manual or any aspect of your amplifier s operation please contact you...

Page 2: ...g down Poor not recommended If mounting the amplifier under a seat make sure there is at least 1 inch 2 5 cm of space above the amplifier s outer shell to permit proper cooling Safety Considerations Your amplifier needs to be installed in a dry well ventilated environment and in a manner which does not interfere with your vehicle s safety equipment air bags seat belt systems ABS brake systems etc ...

Page 3: ...fuse for each 1000 1v2 Product Description The JL Audio 1000 1v2 is a monoblock subwoofer amplifier utilizing proprietary and patented Class D technology Its frequency response is limited to the range below 250 Hz It is not designed for driving midrange speakers or tweeters Every aspect of its operation has been optimized for low frequency amplification For detailed specifications please refer to ...

Page 4: ...Remote input and turn off when 12V is switched off If a source unit does not have a dedicated remote turn on output the amplifier s turn on lead can be connected to 12V via a switch that derives power from an ignition switched circuit The 1000 1 s Remote turn on connector is designed to accept 12 AWG 8 AWG wire 12 AWG is more than adequate for this purpose To connect the remote turn on wire to the...

Page 5: ...itches set to Low See Appendix D page 18 for details CROSSOVER CONTROLS Crossovers are groups of individual electronic filters which allow only certain frequency ranges to pass through them by attenuating frequencies outside the selected range These filters allow the user to specify what frequency range will be sent out of each channel section of the amplifier This in turn allows each speaker syst...

Page 6: ... s or combine their output to a single load in any manner Doing so will damage the amplifier s IMPORTANT Before reconnecting the battery ground and turning the system on verify that all control settings on the amplifier are set according to the needs of the system ADVANCED Bass Control Section The 1000 1v2 includes a versatile bass processing section consisting of two primary components a fully va...

Page 7: ...and mid bass speaker output The Output Polarity switch allows you to peform this polarity inversion without removing any wires Simply flip the switch from the Normal to the Reversed position Experiment with this switch to determine which polarity produces the best overall bass performance in your system listening in particular to the mid bass smoothness and impact to make your determination ier In...

Page 8: ...easily in just a few minutes using equipment which is commonly available in installation bays Necessary Equipment Digital AC Voltmeter CD with a sine wave test tone recorded at 0 dB reference level in the frequency range to be amplified for that set of channels 50 Hz for subwoofer channels 1 kHz for a midrange application The CleanSweep Calibration Disc contains the appropriate test tones and is a...

Page 9: ...4 20 67 21 69 22 72 23 75 24 80 78 25 82 26 86 27 90 28 95 29 100 100 30 107 31 113 32 122 33 131 34 143 35 156 36 200 169 37 186 38 192 39 197 Full clockwise 197 CHART A 3 INFRASONIC FILTER Detent Panel Actual Number Marking Freq Full counter clockwise 14 01 14 02 14 03 14 04 15 14 05 15 06 15 07 16 08 18 17 09 17 10 18 11 19 12 20 13 20 14 25 21 15 22 16 24 17 25 18 27 19 28 20 30 30 21 33 22 35...

Page 10: ...ster amplifier s Output Mode switch to the center Amp Filter position This will send a parallel mono summed signal from the Master amplifier s Amp LP Filter section to its preamp outputs 2 Connect an RCA cable from the Master amplifier s preamp outputs to the main input of the first Slave amplifier Set the Slave amplifier s Amp LP Filter to the Off position This will defeat the LP filter and the b...

Page 11: ...ient connection with the metal inside the terminal block How do I properly set the input sensitivity on my amplifier Please refer to Appendix A page 14 to set the input sensitivity for maximum low distortion output My amplifier doesn t turn on Check the fuse not just visually but with a continuity meter It is possible for a fuse to have poor internal connections that cannot be found by visual insp...

Page 12: ...fer Output MONO OUTPUT ONLY Left Output Right Output Left Ch Right Ch Filter Freq Hz Filter Freq Hz Infrasonic Freq Hz Remote Bass Port Full Range Amp Filter Out Filter Output Mode Filter Slope Mode Mode Slope Input Voltage Input Sens Output Polarity 12dB 24dB Filter Mode LP HP Bass EQ Off On Off 12dB 24dB Low High Normal Reversed Off On 40 45 55 65 85 120 200 15 18 25 30 40 50 60 40 45 55 65 80 1...

Page 13: ...d warranties therefore these exclusions may not apply to you This warranty gives you specific legal rights and you may also have other rights which vary from state to state If you need service on your JL AUDIO product All warranty returns should be sent to JL AUDIO s Amplifier Service Facility freight prepaid through an authorized JL AUDIO dealer and must be accompanied by proof of purchase a copy...

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