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Kenwood KAC-9104D

1800W Max, Class D Monoblock Amplifier

Discontinued
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This item has been discontinued

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Kenwood KAC-9105D

OUR PRICE: $199.99

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Kenwood Car Audio Store Certified Output and Reliable Efficiency

High powered subwoofer applications tend to generate plenty of heat to the amplifier powering them. Music can only be enjoyed when an amplifier is on, and when an amplifier reaches high temperatures it will usually shut off to protect from it damage. The Kenwood KAC-9104D has built-in self-activating fans to protect from high temperatures so your system can play longer without having forced intermissions. That means even under stressful conditions, the built in fans will aid the heatsink to effectively cool the amplifier.

With an impressive output rating of 500 watts RMS x 1 Channel at 4 Ohms, and 900 watts RMS x 1 Channel at 2 Ohms, this amplifier is CEA-2006 compliant so all wattage specifications are true to industry standard. The Kenwood KAC-9104D also has the Capability for a 1-Ohm load to achieve over 900 watts RMS! Combined with their total efficiency and high power output, the Kenwood KAC-9104D is the perfect option for any compatible subwoofer application!

  • Class D Monoblock Car Amplifier
  • RMS Power Rating:
    • 4 ohms: 500 watts x 1 chan.
    • 2 ohms: 900 watts x 1 chan.
    • 1 ohm: >900 watts x 1 chan.
  • Max power output: 1800 watts x 1 chan.
  • MOSFET power supply
  • LED power indicator
  • Tuned Bass EQ (0-18 dB bass boost at 40 Hz)
  • Stackable operation capable
  • Phase inverter (0°,180°)
  • Speaker-level inputs with signal sensing for automatic turn-on)
  • Preamp RCA outputs
  • Short circuit, DC offset, overload, and thermal protection circuitry
  • Aluminum die cast heat sink
  • Built-in cooling fan
  • Gold-plated RCA level inputs
  • Gold-plated screw terminals
  • Variable low-pass filter (50-200 Hz, 24 dB/octave)
  • CEA-2006 compliant amplifier
  • Frequency response: 5-200 Hz
  • Dimensions: 13-3/4"L x 2-5/16"H x 9-3/8"D
  • 4-gauge power and ground leads recommended. Contact us for information regarding a discount on a select amplifier kit when purchased together.
  • 1-year Sonic Electronix warranty

Product History:

Kenwood KAC-9106D thumbnail
(newest, current model)
Kenwood KAC-9105D thumbnail
(previous model, replaced by Kenwood KAC-9106D)
Kenwood KAC-9104D thumbnail
(previous model, replaced by Kenwood KAC-9105D)
Kenwood KAC-9103D thumbnail
(previous model, replaced by Kenwood KAC-9104D)
Kenwood KAC-9102D thumbnail
(previous model, replaced by Kenwood KAC-9103D)

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.
900 watts x 1 channels
RMS Power @ 1 ohm
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 1 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.
>900 watts x 1 channels
Peak Power Output
This form of power rating refers to the maximum amount of power an electronic device can handle or output in an instant without damage. Often times this maximum is achieved during a brief musical burst, such as a drum accent or low bass hit. Some manufacturers display peak power ratings on the face of their products to increase the appeal to consumers. The RMS power rating is more accurate, and we recommend using it for product comparison. This is the peak power output for the amplifier's 5th channel.
1800 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.
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.
1 - Mono
Total Peak Power Output
The total peak power output is measured as the wattage per channel multiplied by the number of channels, and is calculated at the lowest level of operating impedance.

It is measured during a brief musical burst, such as a sudden drum accent. Some manufacturers display peak power ratings on the face of their products to increase the appeal.

The RMS power rating is more accurate, and we recommend using it for product comparison.

1800 watts
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 ohms
Minimum Impedance Bridged
The lowest impedance the amplifier will handle when it is bridged.
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.
0.8%
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.
1 pair
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)
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 - 200 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.
75 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 - 18 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.
No
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).
Yes
Fuse Rating
The amperage and the number of fuse(s) an amp requires.
30A x 2 
Strappable
Some amplifiers can be "strapped" together in order to increase the output of a single audio channel. These amplifiers feature RCA preamp outputs, allowing you to pass the signal directly from one amp to the other to ensure consistency.
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.

Yes
Sonic Certified Amplifier
Sonic Certified amplifiers have been tested by the experts at Sonic Electronix to meet or exceed the wattage ratings provided by the manufacturer. If this is marked as Yes, then you can trust the wattage ratings. If marked as No, then we have tested the amplifier and it did not meet the advertised wattage ratings. If marked as Not Tested, then the Sonic Electronix experts have not yet been able to test the amp.
Amp Bluetooth Connectivity
This feature will tell you if the amplifier has the capability to connect to a Bluetooth device.

Specials with this Item

Promotions
Promotions we have offer More Ways to Shop for items that are on clearance, last chance, special offer and sales, Made in America, and more!

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
75%
4 Star
18%
3 Star
5%
2 Star
1%
1 Star
1%

Average Attribution Rating

Durability
4.6
Value
4.6
Features
4.4
Design
4.7
Usability
4.7
mickey

Indianapolis,indiana

Overall
Durability
Value
Features
Design
Usability
good amp!!!

January 31, 2012

I just bought one of these amps a couple of days ago and i have to say out of all of the car audio I've owned this amp seals the deal. I am pushing 2 12" Pioneer champion series subs and it is amazing. I recommend this amp to any one who is looking for a big time bass.

4 of 6 found this helpful

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Tyler

Mattoon, IL

Overall
Durability
Value
Features
Design
Usability
Great Amp

February 23, 2011

This amp is awesome. For the guy who said it would go into power protect mode at 1 ohm its not that the amp can't handle it its your stock alternator not being able to keep up and your voltage is dropping to low thus sending it in to micro protect mode. Got this wired at 1 ohm to 2 Rockford Fosgate 12 inch p3's with a 220 amp alternator to keep up the power and all i can say is WOW. So in the future those of you who dont know how to hook up a system properly - DONT WRITE A REVIEW and TAKE IT TO A PROFESSIONAL TO INSTALL. Also its CEA compliant so its 1800 watts peak not 900 just cause you stand outside your car and think it doesnt sound like 1800 doesn't mean its not just means you need to learn how to hook up your stuff.

4 of 6 found this helpful

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orphic

Norfolk

Overall
Durability
Value
Features
Design
Usability
Excellent amp! Just watch out this is now 1800w!!!

September 22, 2010

This amp is everything you could ask for. It's clean, very nice looking and delivers POWER. However! PLEASE be aware that this is NOT an 1800w amp. This is a 900w amp that can be daisychained to another 9104 or 9105 to deliver 1800 watts of power.

I made this mistake of purchasing one thinking it delivered 1800w and my two Pioneers would cut out due to the amp being too small for them. HOWEVER, if you're only looking for something in the 900w range then this is the best BANG for your BUCK to BOOM.

3 of 5 found this helpful

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cesar

las vegas, NV

Overall
Durability
Value
Features
Design
Usability
great amp!

June 30, 2010

I only got this amp because it is CEA-complaint and it was well worth it. It was more than i wanted to pay for but I'm satisfied with the amp. Its pushing my 12" type R , but is uses a lot of power i had to go out and get a capacitor. The amp does get hot but has not cut off on me yet. I still love it and would recommend it 100%

4 of 7 found this helpful

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Cesar

cooidge, AZ

Overall
Durability
Value
Features
Design
Usability
Love this amp

April 20, 2010

Love this amp! It's mean as heck. Tons of power and really efficient I would recommend this amp over and over again.

3 of 5 found this helpful

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Stas

Silver City, NM

Overall
Durability
Value
Features
Design
Usability
nice

October 10, 2010

This is a really good amp. I've had for almost over a year, I listen to music everyday and let me tell you!!! I love it! I use it to power up my Pioneer sub and I never had no problems with it!!! Looks nice - matches my stereo and neon lights. Overall - I'm satisfied with my choice, good deal Sonic Electronix.

3 of 6 found this helpful

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jawz

lakewood, ca

Overall
Durability
Value
Features
Design
Usability
excellent purchase

October 2, 2010

i have been running this amp now for 6 months and it is incredible. it over powered two kicker cvt 12 in sealed boxes and is now pushing two kicker solo 12 L7's with amazing ease. this was an excellent purchase and the service from from sonic was great

3 of 6 found this helpful

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Andrew

Uganda

Overall
Durability
Value
Features
Design
Usability
Great Value

September 17, 2010

Yeah! I would consider this amp of great value. I have used other amps before and found them wanting especially if you want more power, but this thing is a real 'worth your money' kind of gadget. I recommend it for those with serious subs..

3 of 6 found this helpful

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Travis

Independence, MO

Overall
Durability
Value
Features
Design
Usability
Most Power for the Money. Period.

August 19, 2010

I have owned many amps over the years from RF, MTX, XTANT, Alphasonik, and so on. All were great amps but I will have to say I was most surprised by this Kenwood. First thoughts after first picking up the amp is no way this is a 900 watt amp because it doesn't weigh very much at all compared to other amps I have owned. The RF P3001 (300 Watt) I was replacing weighed twice as much. After installing it with 4 gauge power and ground wire with a 1 farad cap on two Kicker 12" L5's I was totally amazed! This amp puts down some power and that ain't no joke! Only down fall Is no remote bass knob but if you get it dialed in you really don't need it. You WILL NOT be disappointed in the power this Kenwood will deliver I promise!

3 of 6 found this helpful

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Curtis

Oakland, MD

Overall
Durability
Value
Features
Design
Usability
Don't shop anyplace else!

April 30, 2010

Sales, parts, and shipping were all first rate. The products I bought from Sonic Electronix (KAC-9104D: Infinity 475a: Rockford Fosgate RFK4D: Rockford Fosgate RFI-20) all arrived very quickly and have been rattling the glass in my 05 Siera and bringing smiles to peoples faces, especially the women when they sit in the back seat where the subs are mounted underneath!!!!!

3 of 6 found this helpful

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DFkilla

monahans, Tx

Overall
Durability
Value
Features
Design
Usability
Good stuff

April 16, 2010

Easy to hook up and adjust... had one that my base tore up after a good long while.... got a 2nd no problems yet

2 of 4 found this helpful

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Tim

Fayetteville, NC

Overall
Durability
Value
Features
Design
Usability
Great output

April 2, 2010

Just got it installed today. Sounds great hooked up to a Pioneer 12" Dual 4 ohm Champion PRO Series Subwoofer running at 2 ohm for a rated 900 RMS. I also went with a 2.0 Farad Digital Power Capacitor made by Tsunami to help reduce the lights dimming. I have a stock battery and alternator on a 2009 Accord and only running 8 gauge to the amp. Despite this it sounds really good and I have 3 Gauge shipping to upgrade the wire to see if that helps with the lights slightly dimming.

The sub is in a .8 ^ft sealed box and combined with this amp it thumps. I have the signal input coming from the stock 8" sub that comes in my car. That way I can control the output of the amp and sub from my stock head unit. Definitely comes in handy to adjust bass output for different songs without affecting the 6.5's in my car.

It's great tight responsive bass in a small package taking up only about one total square foot. I'd recommend it to anyone wanting the best in affordable sound upgrades. I have yet to play it at full volume yet as I'm still breaking it in but it does sound incredible.

3 of 6 found this helpful

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Tom

fresno, Ca

Overall
Durability
Value
Features
Design
Usability
Great Amp

March 29, 2010

Great amp lots of power...Received it in new condition and has worked perfectly since i bought it a year ago...Would definitely buy again :)

2 of 4 found this helpful

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Derrick

Brevard,NC

Overall
Durability
Value
Features
Design
Usability
This amp is a BEAST

March 5, 2010

This amp is excellent. I upgraded "the big three" and installed a yellow top optima battery before I installed this amp because even though it is class D, it takes some juice. This amp will pound a crack in the pavement when combined with the right power supply and subs.I have put the pain on this amp and it only gets warm. This amp has NEVER overheated or clipped out. It is my opinion that if one knows what there doing, this is a cool running dependable amp that is a real bargain for roughly $200.00

2 of 4 found this helpful

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Mike

Oak Lawn, IL

Overall
Durability
Value
Features
Design
Usability
Truely amazing!

February 19, 2010

It's a great value. I found this same exact amp at best buy for 300 bucks. It doesn't even heat up when it is turned up. Nice bass boost too!

1 of 2 found this helpful

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frank

Tulsa, OK

Overall
Durability
Value
Features
Design
Usability
WOOOH

February 13, 2010

This thing is awesome!!! it was so easy to mount, had the self tapping screws which made install so easy. all the wires connect tightly and this thing throws out some nice power!! if your looking for something to BUMP, then look no further, this is your amp

0 of 0 found this helpful

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trudy

ashland, OH

Overall
Durability
Value
Features
Design
Usability
good power for a good price

February 13, 2010

i have this powering a kicker l5 15"! i love it i have it mounted to the back of my seat and it looks great! i would recommend this for anything 750-1000 watts

0 of 0 found this helpful

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Rick

New York

Overall
Durability
Value
Features
Design
Usability
Awesome Power Amp for the Price

February 11, 2010

i recommend this amp with a capacitor. it draws too much power causing lights to dim and such. but in overall performance i have won 3 competitions with it. very nice on pure power and very low % distortion of bass is the freq is set right.

i have:
Equalizer - Kenwood KGC-9044
Head Unit - Kenwood KDC-X791
2 Bass Amp - Kenwood KAC-9104D
4 12" Kenwood KFC-XW12R @ 1.33 Ohms
Inner Voice Amp - Kenwood KAC-X40 - 100 watts RMS x 4 @ 2 ohms

i have to say Kenwood does match their frequency good. as to loudness is not all that makes a Car Audio System good but frequency is my priority.
Tip - if you match frequency it will always beat loudness. ask yourself this... why sound loud but sound like crap then quality sound and in frequency response. Thats what makes people say Damn you sound awesome then just to be the loudest guy on the block. i won my competitions based on fidelity, clarity and bass DB's

0 of 0 found this helpful

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jr

columbus,Ohio

Overall
Durability
Value
Features
Design
Usability
decent amp

January 26, 2010

this is a decent amp, i hooked it up to a set of kenwood kfc-w3012's for a 2ohm load with a capacitor and it hits so hard its like a nice back rub sittin' down in my car but they don't set any car alarms off but its still pretty decent and one of my best buys ever never bought a amp so cheap!

0 of 0 found this helpful

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CN22

Houston, Texas

Overall
Durability
Value
Features
Design
Usability
Best Amp

January 25, 2010

I have the 1000 watt version of this same amp and let me tell you.... my bass knob is barley past half way with my 2 JL W1s. My system hits hard and and I could only imagine adding 800 watts. I'd be scared to blow the subs out!

0 of 0 found this helpful

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Accessory Tools and Products

Accessories added

NVX XKIT42 100% OFC True 4 Gauge Wiring Kit with RCA Cables and Speaker Wire

The reviews speak for themselves, this is awesome wire with everything you need!

Your Price $89.99

Stinger SK4641 4 Gauge Wiring Kit

Get a high quality amp kit from Stinger to get the most from your new amp!

Your Price $64.99

Belva BAK42 4 Gauge Amplifier Installation Kit

Great amps need great wire at a great price. This amp kit has everything you need!

Your Price $29.99

NVX XBG3PK 1/0 Gauge OFC Big 3 Upgrade Kit

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

Your Price $79.99

Belva BBG3KT CCA 1/0 Gauge Big Three Kit

Features everything needed to upgrade factory power and ground wire.

Your Price $39.99

Universal Remote Level Bass Control

Controls bass level and frequency via RCA/Interconnect connectors on any amp.

Your Price $7.99

Small Universal Remote Level Bass Control

The Scosche RLC is a smaller universal bass remote that connects via RCA inputs.

Your Price $11.99

StreetWires FB4

4 AWG / 4 Gauge Firewall Bushing

Your Price $6.95

NVX XIV25 V-Series 2-Channel RCA Cable

16.4 ft of V-Series 2-Channel RCA Audio Premium Interconnect Cable with Dual Twisted Pair Hyper-Flex Technology

Your Price $11.99

NVX XIX25 X-Series RCA Interconnect Cable

16.4 ft. of 4-Channel X-Series RCA Cable with Dual Twisted Pair Hyper-Flex Technology

Your Price $18.99

NVX XWS1225 12 AWG Speaker Wire

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

Your Price $39.99

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 $9.99

Belva BBSW167 16 AWG Speaker Wire

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

Your Price $7.99

Scosche SPL Meter SPL1000F

Handheld boomSTICK measures your SPL range from 60 to 135 dB

Your Price $21.99

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Product Summary

Manufacturer

Model Number

KAC-9104D

UPC

019048176899

Weight

9.00lbs

Internal SKU

kac9104d

Internal Product ID

11795

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: Kenwood KAC-9104D