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 |  JL Audio - RD1500/1 Owner’s Manual  

PRODUCT DESCRIPTION

The RD1500/1 is a monoblock amplifier  

utilizing JL Audio NexD™ high speed switching 
technology to deliver outstanding fidelity  
and efficiency.

The RD1500/1 can be operated with a wide 

variety of source units and system configurations.

Its frequency response is limited to the 

range below 500 Hz. It is not designed for 
driving midrange speakers or tweeters. Every 
aspect of its operation has been optimized 
for low-frequency amplification. 

TYPICAL INSTALLATION SEQUENCE

The following represents the sequence 

for a typical amplifier installation, using an 
aftermarket source unit or OEM Interface 
processor (like the FiX™ 82 or FiX™ 86). 
Additional steps and different procedures may 
be required in some applications. If you have any 
questions, please contact your authorized  
JL Audio dealer for assistance.

 

  1)  Disconnect the negative battery post 

connection and secure the disconnected cable 
to prevent accidental reconnection during 
installation. This step is not optional.

  2)  Run 2 AWG copper power wire from the 

battery location to the amplifier mounting 
location, taking care to route it in such a way 
that it will not be damaged and will not  
interfere with vehicle operation. Use 2 AWG 
or larger power wire and a fused power 
distribution block if additional amplifiers are 
being installed with the RD1500/1.

 3)  Connect the power wire to the positive battery 

post. Fuse the wire with an appropriate fuse 
block (and connectors) within 18 inches (45 
cm) wire length of the positive battery post. 

This fuse is essential to protect the vehicle. 

Do not install the fuse until the power wire 

has been securely connected to the amplifier.

  4)  Run signal cables and remote turn-on wire 

from the source unit to the final amplifier 
mounting location.

  5)  Run speaker cables from the speaker systems 

to the amplifier mounting location.

  6)  Find a good, solid metal grounding point 

close to the amplifier and connect the 
negative power wire to it using appropriate 
hardware (use of the JL Audio ECS master 
ground lug, XB-MGLU is recommended). Use 
2 AWG copper wire, no longer than 36 inches 
(90 cm) from the amplifier to the ground 
connection point. In some vehicles, it may be 
necessary to upgrade the battery ground wire. 
(See page 5 for important notice).

  7)  Securely mount the amplifier and remove  

the top control panel cover using the  
supplied 2.5 mm hex wrench.

  8)  Connect the positive and negative 

power wires to the amplifier. A fuse 
near the amplifier is not necessary if 
the RD1500/1 is the only device being 
run from the fused main power wire. 
If the fused main power wire is shared 
by the RD1500/1 and other amplifiers 
or devices, fuse each amplifier/device 
within 12 inches (30 cm) of wire length, 
via a fused distribution block or multiple 
individual fuse blocks/on-board fuses.

 9)  Connect the remote turn-on wire to the 

amplifier or configure the “Turn-On Mode” 
switch for automatic turn-on.

10) Connect the input cables to the amplifier.

11) Connect the speaker cables to the amplifier.

12)  Carefully review the amplifier’s control  

settings to make sure that they are set 
according to the needs of the system.

13)  Install the power wire fuse (150A for a single 

RD1500/1) and reconnect the negative battery 
post terminal. Install the fuse (150A) near the 
amplifier (if applicable).

14)  Turn on the source unit at a low level to 

double-check that the amplifier is configured 
correctly. Resist the temptation to crank it up 
until you have verified the control settings.

15)  Make necessary adjustments to the 

input sensitivity controls to obtain the 
right overall output and the desired 
balance in the system. See Appendix 
A (page 12) for the recommended 
input sensitivity setting method.

16)  Replace the top control panel cover using the 

supplied 2.5 mm hex wrench.

17)  Enjoy the fruits of your labor with your 

favorite music.

Содержание NexD RD1500/1

Страница 1: ...rized JL Audio dealer Your authorized dealer has the training expertise and installation equipment to ensure optimum performance from this product Should you decide to install the amplifier yourself p...

Страница 2: ...und on the bottom panel of the amplifier and on the amplifier packaging Serial Number INSTALLATION APPLICATIONS This amplifier is designed for operation in vehicles with 12 volt negative ground electr...

Страница 3: ...anner which does not interfere with your vehicle s safety equipment air bags seat belt systems ABS brake systems etc You should also take the time to securely mount the amplifier so that it does not c...

Страница 4: ...speaker systems to the amplifier mounting location 6 Find a good solid metal grounding point close to the amplifier and connect the negative power wire to it using appropriate hardware use of the JL A...

Страница 5: ...w The ground connection should be made using 2 AWG copper wire and should be kept as short as possible while accessing a solid piece of sheet metal in the vehicle The surface of the sheet metal should...

Страница 6: ...rminal tighten the set screw firmly taking care not to strip the head of the screw and making sure that the wire is firmly gripped by the set screw If a source unit does not have a dedicated remote tu...

Страница 7: ...n you should select The High position on the Input Voltage switch selects an input sensitivity range between 800mV and 8V for all input channels This is useful for certain high output preamp level sig...

Страница 8: ...void distortion Correct use of the filter can substantially improve the fidelity of your audio system LP Filter Operation The RD 500 1 monoblock employs a 12 dB per octave low pass active filter with...

Страница 9: ...of the preamp output SUBWOOFER OUTPUTS The RD1500 1 is designed to deliver power into subwoofer loads equal to or greater than 1 ohm of nominal impedance The RD1500 1 s subwoofer outputs are designed...

Страница 10: ...ondition remains it will return to red and mute the output again A continuous over current condition is displayed with alternating red blue lights Because the muting behavior may be very short in dura...

Страница 11: ...try in the JL Audio amplifiers requires specifically trained service personnel Do not attempt to service the amplifier yourself or through unauthorized repair facilities This will not only void the wa...

Страница 12: ...or reasonable gain overlap with moderate clipping at full volume 5 Verify that you have disconnected the speakers before proceeding Play a track with an appropriate sine wave within the frequency rang...

Страница 13: ...B referred to 1W A weighted 20 Hz 20 kHz noise bandwidth Frequency Response 7 Hz 500 Hz 0 1dB Damping Factor 1100 4 ohms 50 Hz 550 2 ohms 50 Hz Input Section No of Inputs One Stereo Pair Input Type Di...

Страница 14: ...s required To test for this problem jump the 12VDC wire to the Remote terminal to see if the amplifier turns on I hear a repetitive ticking or popping sound coming out of the speaker s Check Check the...

Страница 15: ...e 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 amplif...

Страница 16: ...16 JL Audio RD1500 1 Owner s Manual INSTALLATION NOTES Use this diagram to document your amplifier s switch and control positions...

Страница 17: ...17...

Страница 18: ...18 JL Audio RD1500 1 Owner s Manual NOTES...

Страница 19: ...19 NOTES...

Страница 20: ...retail and no warranties whether express or implied shall apply to this product thereafter Some states do not allow limitations on implied warranties therefore these exclusions may not apply to you Th...

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