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JL Audio HD900/5

Compact, 900W RMS 5-Channel Class D HD Series Full System Amplifier

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List price $1199.95

$909.95

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More Power from a Smaller Chassis

The 5-channel JL Audio HD900/5 HD series car amplifier delivers unreal power in a very small and convenient size. Often times smaller amplifiers will lack power or even quality, however with the new JL Audio HD amplifiers this will not be the case. The HD amplifiers are equipped with amazing technologies like Single Cycle Control, which tracks audio signal and compares it to the real PWM waveform and then corrects it accordingly each and every cycle. This helps to control distortion causing mechanisms improving the quality of the amplifier tremendously. HD amplifiers also feature the R.I.P.S. System, R.I.P.S. stands for "Regulated, Intelligent Power Supply" and ensures consistent power delivery over a wide range of battery voltages and load impedance's. This means you will received the same power output at 4 ohms all the way down to 1.5 ohms each and every single time. With dual mounting options for added versatility and advanced heatsinks with vertically oriented fins for extreme heat control, the JL Audio HD amplifiers are unmatched by other amplifiers in the same class.

Product Features:
  • JL Audio HD Series 5-Channel Class D Amplifier
  • Main Channels RMS Power Rating (11V-14.5V):
    • 4 ohms: 100 watts x 4 chan.
    • 3 ohms: 75 watts x 4 chan.
    • 2 ohms: 75 watts x 4 chan.
    • 1.5 ohms: 75 watts x 4 chan.
  • Bridged RMS Power Rating (11V-14.5V):
    • Bridged, 8 ohms: 200 watts x 2 chan.
    • Bridged, 6 ohms: 150 watts x 2 chan.
    • Bridged, 4 ohms: 150 watts x 2 chan.
    • Bridged, 3 ohms: 150 watts x 2 chan.
  • Subwoofer Channel RMS Power Rating (11V-14.5V):
    • 4 ohms: 500 watts x 1 chan.
    • 3 ohms: 500 watts x 1 chan.
    • 2 ohms: 500 watts x 1 chan.
    • 1.5 ohms: 500 watts x 1 chan.
  • Total Continuous Power Rating: 900 watts
  • Single Cycle Control delivers reference-grade performance while requiring less current from the vehicle's electrical system
  • R.I.P.S (Regulated, Intelligent Power Supply) ensures consistent power delivery over a wide range of battery voltage and load impedances
    • Regulated means that the power supply adjusts its operation to maintain the rated power output and low distortion operation over range of vehicle voltages
    • Intelligent power supply is a circuit that monitors output current to perfect the amps output power over a range of load impedances. It detects the actual impedance and adjusts rail voltages for the best output
  • LED power indicators
  • Variable front crossover: 50 - 500Hz, selectable slope 12dB/octave
  • Variable rear crossover: 50 - 500Hz, selectable slope 12dB/octave
  • Differential-balanced inputs to effectively control noise and will allow you to connect most OEM units straight to the amplifier
  • Three sets of RCA Jack input, front, rear and subwoofer with a dedicated input sensitivity gain control for the channels
  • RealSink heat management with rollback protection removes heat from the amplifiers circuitry while the vertical heat
  • Infrasonic filter: Defeatable 24dB/octave at 30 Hz
  • Subsonic Filter (24 dB at 30 Hz)
  • Frequency response: 12 - 28,000Hz
  • Optional wired remote level control: JL Audio HD-RLC
  • Optional stacking equipment for HD amplifiers: JL Audio HD Stack Kit
  • Dimensions: 10-13/16"D x 8-7/8"W x 2H
  • 4-gauge power and ground wiring is required for installation. Contact us for information regarding a discount on select amplifier kits when purchased together with this amplifier.
  • 1-year SonicElectronix.com warranty

Power Specifications - Full Range Channels

RMS Power @ 4 ohms

The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far.

If the final impedance of your speakers or subwoofers equals 4 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound.

100 watts x 4 channels
RMS Power @ 2 ohms

The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far.

If the final impedance of your speakers or subwoofers equals 2 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound.

75 watts x 4 channels
Bridged RMS Power

Bridging refers to combining two channels on an amplifier to create one channel with double the voltage and an increased power output. A 2-channel amplifier will bridge down to 1-channel and a 4-channel amplifier can bridge to create 2-channels. An amplifier is most commonly bridged to drive a subwoofer.

Remember, once you bridge two channels down to one its final impedance will be 4 ohms unless otherwise specified. This rating lists the RMS power created once an amplifier is bridged.

150 watts x 2 channels

Power Specifications - Subwoofer Channel

RMS Power @ 4 ohms
The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far. If the final impedance of your speaker(s) or subwoofer(s) equals 4 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound. The 5th channel on these particular amplifiers are usually dedicated for driving subwoofers.
500 watts x 1 channels
RMS Power @ 2 ohms
The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far. If the final impedance of your speaker(s) or subwoofer(s) equals 2 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound. The 5th channel on these particular amplifiers are usually dedicated for driving subwoofers.
500 watts x 1 channels

Amplifier Specifications

Amplifier Series
This designates the series of the amplifier. Many amps are available in a litany of different wattage and channel configurations, but maintain consistent features throughout the product line.
HD (JL Audio)
Amplifier Class

An amplifier increases the power of the signal being fed to it by taking energy from its power supply and matching the signal but increasing its amplitude. Amplifiers use many different methods for converting these electrical signals and have been categorized into classes.

Class A/B: Greater than 50% of the input signal is amplified while the other percentage is “off”. These amplifiers have a small amount of current flowing through the output transistors all the time which almost eliminates crossover distortion. Class A/B has great sound quality but is not as efficient as class D. These amps are most commonly used to drive speakers.

Class D: Also known as switching amplifiers, class D amps have output transistors that are completely turned “on” or “off”. This means that when the transistors are on, there is almost no voltage across them but when they are off there is significant voltage but no current flowing through it which makes these amplifiers very efficient at the cost of sound quality. These amps are most commonly used to drive subwoofers.

Other Classes: You may see classes such as GH, bD, X, FD, etc. by some manufactures. These amplifiers tend to be either class A/B, D or a hybrid of the two but with improvements to their designs that can make them more efficient or offer better sound quality.

D
Number of Channels
Each channel on an amplifier will power one speaker using a positive and negative cable. There are various types of amplifiers, each designed to power a certain number of speakers. Monoblock amplifiers, also known as single channel, are designed to power one or more subwoofers. These amplifiers often have very high power ratings. On the other hand, multi-channel amplifiers power multiple speakers, usually at lower power ratings. 2-Channel and 4-Channel amplifiers can power car speakers or low powered subwoofers. Occasionally you might see a 5 or 6-channel amplifier that can power speakers and subwoofers at the same time. The most common setup is a monoblock amp to run subwoofers and a 4-channel amp to run door speakers. Check out our Knowledge Base for more information.
5
Total RMS Power Output
Total RMS power is measured by multiplying RMS power per channel by the number of channels, and is calculated at the lowest level of operating impedance.

RMS power is the amount of continuous power, measured in watts, that an amplifier produces is called RMS power. The higher the RMS figure, the louder and cleaner your music sounds.

The RMS output figure is much more accurate than the peak rating when comparing products.

900 watts
Maximum Input Gauge Size
This is the largest gauge wire that will fit into the power and ground terminals of this device. The lower the gauge number, the thicker the wire is. For example, a 4 gauge wire is thicker than an 8 gauge wire and thus has higher current carrying capacity. Always do your best to get this size wire to reduce the risk of damage to your components.
4 AWG
Minimum Impedance Unbridged
The lowest impedance the amplifier will handle when it is not bridged.
1.5 ohms
Minimum Impedance Bridged
The lowest impedance the amplifier will handle when it is bridged.
3 ohms
THD at Rated RMS Power
The amount of change in harmonic content of the signal as it is amplified. A lower figure indicates less change and a more accurate amp. THD below 0.10% is inaudible.
.03%
Speaker Level Inputs
Speaker level inputs are commonly referred to as high-level inputs and vice versa. This input type allows you to get your audio signal directly from the speaker wire in your vehicle, instead of using RCA cables. The advantage of this is factory integration, as most stock radios do not have RCA outputs to run amplifiers.
Yes
Preamp Outputs
Many amplifiers are equipped with RCA preamp outputs which pass the original music signal from the source to additional amplifiers. This is known as daisy chaining because the source connects to the first amp, and the first amp connects to the second amp, etc. The advantage to daisy chaining is you only need one 2-channel RCA cable to transfer the signal from the head-unit to the amplifier, and then one additional cable for each amp being daisy chained.
No
Built-in Crossover

A crossover is a type of filtering system that permits only certain frequencies to play. A Low-Pass (LP) crossover allows only frequencies below its setting to get through which is good in the case of some subwoofers. A High-Pass(HP) filter allows frequencies above its setting to pass through, this is normally used on speakers.

When a crossover is set to FULL it means no filtering is added and the full frequency spectrum is allowed through the amplifier. Filtering is important because feeding a speaker frequencies it cannot reproduce effectively creates distortion.

Low-pass (LP)
High-pass (HP)
High-Pass Crossover Frequency
The high-pass crossover frequency can be a fixed crossover point or a variable crossover range. A variable high-pass crossover allows you to select a specific crossover point which allows frequencies above the set crossover point to pass, while making frequencies below the set point gently or harshly roll-off, depending on the steepness of the slope.

The steepness of the roll-off slope is measured in dB/octave and refers to the rate of attenuation (lowering of volume) outside their pass bands.

50 - 500 Hz
Low-Pass Crossover Frequency
The low-pass crossover frequency is typically used for subwoofers. It can be a fixed crossover point or a variable crossover range. A variable low-pass crossover allows you to select a specific crossover point which allows frequencies below the set crossover point to pass, while making frequencies above the set point gently or harshly roll-off, depending on the steepness of the slope.

The steepness of the roll-off slope is measured in dB/octave and refers to the rate of attenuation (lowering of volume) outside their pass bands.

50 - 500 Hz
Subsonic Filter
Allows you to block (filter) ultra-low frequencies that your subs cannot reproduce.
30 Hz
Signal-to-Noise Ratio
This spec compares the strength of the signal to the level of background noise. A higher value indicates less background noise.
108 dB
Bass Boost
The objective of the bass boost is to get more kick out of your subwoofer. It is a circuit that emphasizes the lower frequencies at a given point. The bass boost should always be set first before setting the gain. This feature is known for destroying subwoofers and is commonly used incorrectly, so be cautious.
0 - 15 dB
Bass/Gain Remote
If the amp comes with a bass/gain remote you will be able to control the level of your bass from your dashboard. Typically bass remotes also include a 16-20 ft. wire for installation.
Optional (Accessory required and sold separately)
Fan Cooled
A great feature to have if an amp generates a large amount of heat. Cooling fans can help regulate the temperature to prevent the amp from overheating (burning).
No
CEA-2006 Compliant
Amplifiers that have been tested to meet specific standards. When a car amplifier meets these standards, you can be sure that it will be able to produce the amount of power specified by the official CEA-2006 rating. Usually, these rating consist of the following items:
  • RMS Power
  • Signal-to-Noise Ratio

This rating applies to both external car amplifiers, as well as the amplifiers inside of in-dash stereos.

No

Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Sonic Electronix

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
95%
4 Star
5%
3 Star
0%
2 Star
0%
1 Star
0%

Average Attribution Rating

Durability
4.9
Value
4.5
Features
4.8
Design
4.9
Usability
4.9
David

Weatherford, TX

Overall
Durability
Value
Features
Design
Usability
Wow!

June 21, 2011

This amp is just awesome.. Small and powerful and does not run hot. I have it running 2 Image Dynamics 10's and 4 Boston Acoustics 6". Never misses a beat!

2 of 2 found this helpful

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David

San Pedro, CA

Overall
Durability
Value
Features
Design
Usability
Great product

January 9, 2011

I purchased this JL Audio HD900/5 amp because it had the option to power four door speakers along with a sub woofer. It works great. I have it powering the four speakers in the doors and have the 5th channel powering the sub in the back.

2 of 2 found this helpful

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Barry

Blanch, NC

Overall
Durability
Value
Features
Design
Usability
POWERHOUSE

May 26, 2010

I chose this five channel amp to save space in my Ranger Supercab truck. It powers four speakers in the doors and a JL Audio 10 inch W/6 sub and and it is smaller than most high school textbooks. This amp amazes me every time I crank up the volume. The sound is clean and there is just so much power it's hard to believe it all comes from this little amp. It has a hefty price, but if you want great sound without a big stack of amps, you should consider the JL HD900/5.

2 of 2 found this helpful

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Keyser

Portland, OR

Overall
Durability
Value
Features
Design
Usability
JL Audio HD900/5 Review

February 2, 2010

I bought this unit and paired it with an Aline IVA-W505, Polk speakers and a JL W6 enclosed sub. The amp is absolutely clean way past reasonable listening levels. The highways in my area are horrible due to studded tires in the wintertime. This makes for a tremendous amount of road noise. The amp will drive the system cleanly past ALL road noise which is just incredible. I highly recommend the product. When I sell my car the amp goes with me!

2 of 2 found this helpful

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Philip

Ontario, OR

Overall
Durability
Value
Features
Design
Usability
Small and powerful

October 31, 2009

I cannot believe how powerful this amp is for its size. It is so compact it fits under my front seat without blocking the rear seat vents. The only thing I don't like it the lack of the Q, and the infrasonic dial has gone to a switch.

2 of 2 found this helpful

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Styles

Baytown, TX

Overall
Durability
Value
Features
Design
Usability
Awesome Amp!

July 21, 2014

Very nice looking and sounding Amp. Compact in size also.

0 of 0 found this helpful

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kram351

Turnersville NJ

Overall
Durability
Value
Features
Design
Usability
GREAT AMP !!!!!

July 4, 2014

Small Amp that packs a big bunch !!! Took up 65% less real estate then my two old slash amps . Replaced 300/4v2 and 250/1v2 . I gained room and a improvement in sound quality the extra amps really makes a difference .Sounds great even at lower volume

0 of 0 found this helpful

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brad

Leon valley, tx

Overall
Durability
Value
Features
Design
Usability
Bad ass

June 16, 2014

Just do it, buy this amp, it's the only amp you'll need. Installed in a 2012 f150 supercrew with CL441dsp, C5 5.25X & C5 tweeters on all the doors. Two tw3 10's awesome the best sound

0 of 0 found this helpful

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nick

Marion, in

Overall
Durability
Value
Features
Design
Usability
Great amp

September 27, 2013

Great amp!!! Running one w6 12 and jl c3 componets and coxials in the rear... The amp does a great job and sounds clean but pounds the w6... The amp does get hott though but has never shut off..

0 of 0 found this helpful

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MT

Indianapolis, IN

Overall
Durability
Value
Features
Design
Usability
Impressive!!

June 14, 2013

This amp just stomps. It's running a pair of JL C5-653's in the front, a pair of JL-C5-650's in the rear and a single JL 10W7AE sub. This amp keeps the system simple and it sounds incredible! No new alternator, battery or caps required. The amp is tiny, so I was able to mount in behind a panel in rear hatch area. It's the perfect amp for someone who wants a quality system, but wants to keep it simple. My system is plenty loud with accurate, clean and stable sound. So far the amp has been trouble free. It gets pretty hot, but i would expect that from a class D amp. Nothing unusual though. Can't say enough about the performance of this amp! The amp is a little spendy, but you have to remember is a full system amp. It's doing the work of 2 decently powered amps. 900 watts of truly clean power for accurate music reproduction.

0 of 0 found this helpful

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Sean

Ventura, Ca

Overall
Durability
Value
Features
Design
Usability
Great amp

May 15, 2013

I installed this amp in the rear area of a 2003 Ford F150 Harley edition. It is small enough to be entirely out of sight, it doesn't take any space I was using before, and it's a superb amplifier. If you're reading this review, just go for it. I really don't think you'll find a better value and I know you'll love it. Don't settle for some other amp you don't really want.

0 of 0 found this helpful

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Sculptor 4

Canada

Overall
Durability
Value
Features
Design
Usability
Breathtaking Sound

March 16, 2013

I own a 2010 Grand Caravan. I just installed the JL Audio HD900/5. It is powering Boston Acoustic Pro Series 60 in the Front and Pro Series 50 in the rear. I am running a JL Audio 10" W3v3 in a ported Enclosure on the fifth 500 watt channel. I played my system for my two Teenagers 18 and 17. They said it sounds like a concert at the Bell Center. (Home of the Montreal Canadiens) There is no bigger compliment!

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Brad

Helotes, TX

Overall
Durability
Value
Features
Design
Usability
BAD ASS!

January 5, 2013

I have built many systems over the years and was faced with the dilemma of space in my C5 Corvette... there isn't any! While researching amps, visiting various forums I came across the HD9000/5. I never would have believed what this little jewel was capable of until I bought one and installed it. I currently have it driving two Boston 10" G-1104 of the sub channel, a pair of Boston Acoustic 6.5 Pro series on the front and a pair of MB-quart 6.5 QVL's bringing up the rear. The sound is awesome. I would highly recommend this AMP to any one looking for one amp to do it all. Well worth the price thank you Sonic.

0 of 0 found this helpful

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Jeff

White Bear Lake, MN

Overall
Durability
Value
Features
Design
Usability
Excellent Product

August 31, 2012

I purchased this amp to save on space & money , by using only one amp, which is mounted under the RF seat. There is definitely more than enough clean power to drive a 12'' JL sub & Boston Pro speakers. The sound quality is excellent at all listening levels & I highly recommend this product.

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Brad

Helotes, TX

Overall
Durability
Value
Features
Design
Usability
BAD ASS!

July 31, 2012

What a wonderful amp I'm pushing two 4ohms Boston Tens and two set's of Boston acoustic 6.5 pro series.....awesome sound out of one little amp!

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js

bagdad fl

Overall
Durability
Value
Features
Design
Usability
Great amp

July 17, 2012

This is one of the best amps. It is small, and the sound is great. It is easy to install. I put this in a HD3500 with JL C3 650 and a Z140BH and JL sub boxs with 2 10" subs. It sounds awesome. I would buy!

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Tony407

Portland, OR

Overall
Durability
Value
Features
Design
Usability
Phenomenal Amp

July 3, 2012

I'm using this to power 2 sets of JL Audio ZR650-csi speakers, and a Kicker CVT-10 subwoofer. I think these HD JL Audio amps are among some of the best amps made. They're small, run very cool and don't require a lot of mounting space, super flexible, powerful, and they sound great. I would recommend this amp or any in the HD line to anyone.

0 of 0 found this helpful

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Chefcookie

Asheville, NC

Overall
Durability
Value
Features
Design
Usability
Best 5 Channel Amp out there... PERIOD

May 30, 2012

I've had everything from Soundstream to Polk Audio amps in my car and have had nothing but headaches with them... I put in one of these last year and I'm so happy to be done with all of that! This thing is powerful, sounds great, is suuuper compact and can be mounted just about anywhere, and it stays cool and doesn't miss a beat! I have this baby running 4 Focal Polyglass 165 VB components and two Diamond Audio DS3 10" Subs... in my Scion XD.... The Sound is Phenomenal!!! People giving this a high ranking should also give a high ranking for Value... You get what you pay for and my experience is that is especially true for this amp vs any other 5 channel amp out there.... It's simply the best.

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Roy

Seabeck, WA

Overall
Durability
Value
Features
Design
Usability
Great AMP

May 1, 2012

This AMP is outstanding. 5 channels and all that power. I got it for use in a jeep where I don't have the room for seperate amps for front speakers and subs. The sound quality is exceptional and it drives my dual 12 W3's perfectly. It is a little pricey when compared to other 5 channel amp (ie the alpine), but i think worth the extra money.

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Zach

Pasco, WA

Overall
Durability
Value
Features
Design
Usability
Amp rocks!!

March 20, 2012

I used this to push two 8" Wet Sound tower speakers, two 6-1/2" Wet Sound inboat speakers, and 500 watts to the JL 12" sub. It has plenty of power and sounds great!!

0 of 0 found this helpful

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Accessory Tools and Products

Accessories added

NVX XKIT44 4-Gauge 4-Channel Wiring Kit

4-Channel 100% OFC Complete True 4 Gauge Amp Kit with RCA Cables and Speaker Wire

Your Price $99.99

JL Audio XD-PCS4-1B 4 Gauge Wiring Kit

Get a JL Audio wiring kit to match your new JL amplifier! Don't forget the RCA's!

Your Price $119.95

NVX XBG3PK 1/0 Gauge OFC Big 3 Upgrade Kit

Comes with everything you need to upgrade your power and ground wire.

Your Price $59.99

Kicker Big 3 Package 1/0 Gauge Big 3 Upgrade Kit

Get all you need including wire cutters to upgrade your power and ground wire.

Your Price $149.99

Belva BBG3KT CCA 1/0 Gauge Big Three Kit

Features everything needed to upgrade factory power and ground wire.

Your Price $39.99

JL Audio HD-RLC

Remote Level Control for Select JL Audio Amplifiers

Your Price $34.95

StreetWires FB4

4 AWG / 4 Gauge Firewall Bushing

Your Price $6.95

StreetWires FB0

1/0 Gauge Firewall Bushing

Your Price $6.95

NVX XDBU4 - Top of the Line!

Distribution Block with Two 1/0 or 4 AWG Inputs and Four 4 or 8 AWG Outputs

Your Price $17.99

Professional Installation for your Car Power Amplifier

Covers labor charges through our professional installer network.

Your Price $89.99

Stinger SI4617 4000 Series Interconnect Cable

17 ft. 6-Channel 4000 Series Audio Interconnect Cable

Your Price $41.99

NVX XWS1225 12 AWG Speaker Wire

25 ft. of True 12 Gauge 100% Copper EnvyFlex Speaker Cable/Wire

Your Price $39.99

NVX XWS1250 Speaker Wire

50 ft. of True 12 Gauge 100% Copper EnvyFlex Speaker Cable/Wire

Your Price $29.99

NVX XWS1625 16 AWG Speaker Wire

25 ft. of True 16 Gauge 100% Copper EnvyFlex Speaker Cable/Wire

Your Price $13.99

Belva BBSW127 12 AWG Speaker Wire

12 Gauge 7 Meter (23 Ft) Speaker Wire (CCA)

Your Price $14.99

Belva BBSW167 16 AWG Speaker Wire

16 Gauge 7 Meter (23 Ft) Speaker Wire (CCA)

Your Price $12.99

SMD DD-1 Distortion Detector

Set the gain of an audio amplifier quickly and accurately

Your Price $149.99

AutoSound 2000 CD-102

High Frequency Test CD specifically designed for the set-up and evaluation of sound system imaging and placement.

Your Price $11.99

JL Audio HD Stack Kit

Stacking Hardware for Two JL Audio HD / MHD Amplifiers

Your Price $39.95

XIX2025 Strapping RCA

0.25 Meter (0.86 ft) Hyper-Flex RCA cable w/ Serpentine-Cut Nickel Plated Connectors

Your Price $12.99

Product Summary

Manufacturer

Model Number

HD900/5

UPC

699440982238

Weight

9.00lbs

Internal SKU

hd9005

Internal Product ID

20135

Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: JL Audio HD900/5