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Kenwood KAC-9104D

1800W Max, Class D Monoblock Amplifier

Discontinued
|

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This item has been discontinued

But you may be interested in the newest model that's available.

kac9105d thumbnail

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 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
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 
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

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

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.

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SCORPION

Tacoma, WA

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Value
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Usability

Best amp I've ever had.

January 6, 2013

Hi, I've been installing car audio equipment for over 20 years and let me just say that, this amp is the best amp I've had so far. As was said before, this amp is power hungry. You want to make sure you have an upgraded altinator and/or extra battery to feed it. Running at 1ohm on any 1ohm amp will draw a lot of power from your vehicle power source. I had that problem and I already had an extra battery in my truck, so all I had to do was upgrade my altinator to keep up with the power requirement from my amp. No problem since, and I would recommend this amp to anyone looking for a good investment. It's always a good idea to talk to experts about amps, subs, or whatever about what type of system you want and what's the best way to go about getting it set up and installed and what kind of power requirement you may need.

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mickey

Indianapolis,indiana

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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.

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Nathan

Washington, PA

Overall
Durability
Value
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Usability

Kenwood 9104d

January 6, 2012

I didn't get the amp from here, I bought it off a guy that powered two cvr's with it. I powered two kenwood kfc-3012's and these things bumped hard. Although after a while the Kenwoods proved to be not enough for me so I went and bought an Addictive Audio 15 version 3 1000 watt rms 2100 peak. I still have this amp and let me say I am surprised the excursion this amp produces. It hits easily hits 20% harder than the two 12's. But like everyone said it is power hungry, either upgrade your alternator, get a second battery, and possibly do a big 3 and you will never have a problem with this amp running at 1 ohm. I have to push this thing over 3/4 gain and input sensitivity for it to shut off. But I did notice it will start to distort if you go too high so if you don't distort the amp it won't shut off.

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IAMD1

Dirty South

Overall
Durability
Value
Features
Design
Usability

AIGHT

April 17, 2011

It ok, puts out good power, just cut out sometimes. i only have subs bridged 2ohms, so i added another fan, better now

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JL POLO

Montgomery,Al

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Value
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Usability

hands down a good amp.

March 5, 2011

I don't know if cause the amp has never overheated since I installed it , i paid dirt cheap for gold, or cause new my 2 12' JL w3v3 are not shutting this amp down at full volume. But i love this amp.... not everyone gets lucky with this amp cause its a gambling amp. My cousin gets the exact same amp and his stop working after two hours. So just have to be careful......... of course i feel like it may no be the full 1800 watts but you get what you paid for. but when i had my 2 12' JL w1v2 this amp was perfect for such subs.... I recommend this amp if you got under 700 Rms to push

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javi2500hd

mission, tx

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Value
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Usability

this kenwood amp is good

January 5, 2011

This amp is really great but not 1800w the fuse rating is 60A so its probly only pushing about 1000w but good amp for a small 1000w system I had it concted to 2 12" l5s and its thing wouldnt last 10 mins with the volume half way up it would turn off and overheat repeatedly.

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B.R.

Louisiana

Overall
Durability
Value
Features
Design
Usability

Decend amp

December 6, 2010

To the guy who said he's pushing a couple of L7's with this amp, in your dreams. This amp has no where near that kind of power. That being said. Its a decent amp. Don't expect it to run @1ohm, it will go into protect mode often. Solid amp if your subs are rated for around 800watts RMS, then this is a good choice.

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Shawn

Tacoma, WA

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Value
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Usability

A top amp by a top brand with top quality!

November 14, 2010

You can't beat the value of this amp! Awesome specs, great price, and it matches my other amps. I plan to purchase another one soon for my current car!

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Stas

Silver City, NM

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Value
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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.

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jawz

lakewood, ca

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Value
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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

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orphic

Norfolk

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Value
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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.

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Jerry

Winchester, VA

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Value
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Design
Usability

Great value

September 21, 2010

It is very powerful for it size has a built in fan for cooling. I would recommend it to anyone. It can handle 1 ohm load.

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william

Crescent Citycrescent city, CA

Overall
Durability
Value
Features
Design
Usability

Kicker

September 18, 2010

I got this amp for my brothers Chevy s10 and its really good amp for the money. Way better than the xplode and visonic Id say. I dont like 1 ohm loads so 900w rms is plenty for his truck. The only thing is you need to remove the silver plate to get to the terminals :(

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Andrew

Uganda

Overall
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Value
Features
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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..

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k-dub

Canada

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Value
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Usability

happy costomer

August 21, 2010

this is truly a nice amp 1800 watts it destroys my kicker L5 it stays nice and cool thanks to the fan never has it shut off from over heating or overload she takes it all. For anyone that wants an amp this is decent!

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Travis

Independence, MO

Overall
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Value
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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!

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Lsxtrkiller

Bakersfield, Ca

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Value
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Design
Usability

Great if your electrical system can handle it

August 2, 2010

This amp is great for the price the only flaw i could find was that it sucked a ton and a half of power it drained my power cell in under 10 min if the car was not on. my friend has a larger alpine mpr-m1000 amp and a smaller power cell than mine and his lasts a lot longer... and we measured from a full charge on the cells

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cesar

las vegas, NV

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Value
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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%

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coolguy

Indianapolis, IN

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Value
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good amp

June 1, 2010

installed this in my buddy's car. has a lot of power for the price. Nice settings. I tuned it so good and it hit so hard two other people went out and got this amp too. just a good amp for the price.

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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

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

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

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

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 $26.99

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 $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

Scosche SPL Meter SPL1000F

Handheld boomSTICK measures your SPL range from 60 to 135 dB

Your Price $21.99

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

AutoSound 2000 CD-104

Audiophile reference series test disc for evaluation of all audio components.

Your Price $11.99

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