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Kenwood KAC-8104D

1000W Max, Class D Monoblock Amplifier

Discontinued
|

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This item has been discontinued

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Kenwood KAC-8105D

OUR PRICE: $125.00

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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-8104D 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 300 watts RMS x 1 Channel at 4 Ohms, and 500 watts RMS x 1 Channel at 2 Ohms, this amplifier is CEA-2006 compliant so all wattage specifications are true to industry standard. Combined with their total efficiency and high power output, the Kenwood KAC-8104D is the perfect option for any compatible subwoofer application!

  • Class D Monoblock Car Amplifier
  • RMS Power Rating:
    • 4 ohms: 300 watts x 1 chan.
    • 2 ohms: 500 watts x 1 chan.
  • Max power output: 1000 watts x 1 chan.
  • MOSFET power supply
  • LED power indicator
  • Tuned Bass EQ (0-18 dB bass boost at 40 Hz)
  • 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: 11"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-8105D thumbnail
(newest, current model)
Kenwood KAC-8104D thumbnail
(previous model, replaced by Kenwood KAC-8105D)
Kenwood KAC-8103D thumbnail
(previous model, replaced by Kenwood KAC-8104D)
Kenwood KAC-8101D thumbnail
(previous model, replaced by Kenwood KAC-8103D)

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.
300 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
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.
Not Stable
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.
1000 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.

1000 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.

500 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.
2 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.
83 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.
40A x 1 
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
69%
4 Star
20%
3 Star
6%
2 Star
4%
1 Star
0%

Average Attribution Rating

Durability
4.5
Value
4.7
Features
4.5
Design
4.7
Usability
4.7

Rob S

Lawrenceville, GA

Overall
Durability
Value
Features
Design
Usability

Clean Trouble Free Power To my JL Audio 10" Sub.

August 10, 2011

Currently using this amp to power a 10" JL Audio W1V2 Sub in a sealed enclosure in the back of a Scion TC hatchback. I was skeptical with using this amp with some of the reviews stating it runs hot. After getting it setup I am amazed at the power, clarity and clean base response I am getting from the subwoofer. With the volume at medium to high listening levels for over an hour the amp was still cool to the touch. I think this may be due to the fact that I am running it at about 1/2 to 2/3 gain as any more than that would be too much power/base for the interior of my car. I suspect if the amp was run at 2ohm and the gain turned full up and really played loud for an extended period it might get hot, if this is the case then I would say don't blame the amp as your pushing it to the max, just get a larger amp that can power the sub to the level you need without having to max it out all the time. Anyway, this amp when run responsibly is incredible and well worth the price. Completley satisified and would recommend the amp to anyone who uses their subwoofer sensibly and within specifications. Excellent product.

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HOT S**T

elk river, mn

Overall
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Value
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Usability

Does what is says

April 10, 2011

i have it powering to Kicker CVR 12"s sounds good has never cut out but it get HOT AS S*** like I can't even hold my hand on it, it gets so hot

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Paul

Tewksbury, MA

Overall
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Value
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Usability

solid

April 1, 2011

My brother has this amp pushing 2 10" Alpine Type-E's in a center port box and they slam. Most people don't believe it when he says hes only running 500 watts. Does get a little hot but has never overheated even after hours of use. Definitely recommend this amp to anyone

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Michael

Pittsburgh, PA

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Value
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Usability

Great amp and delivers true rms power!

February 16, 2012

I use to have this hooked up to a 10" mtx sub and this amp delivers the power! Puts out a true 300w at 4 ohms and made my sub slam! Very reliable, had it for over a year with no problems at all!

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Taylor

Milford, MI

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Value
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Design
Usability

Good amp for the money

March 15, 2011

This amp pushes out the power it says it does. however my friend has one and it shuts off if he runs it at high volumes for a long time. His subs are wired at 2 ohms so it should be able to handle it.it also gets very hot but overall a solid amp for the price.

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Aaron

Maple Grove, Minnesota

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Value
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Design
Usability

Kenwood KAC-8104D

October 23, 2010

Had this amp for about a month know on 2 12" kicker comps. Never Cut out or anything! Stays nice and cool and pounds hard! great amp!

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1985cutty

Fair Oaks, CA

Overall
Durability
Value
Features
Design
Usability

Great Amp

September 24, 2010

I've had this amp for about a year now, I've had 4 systems since then; 2 12" duals, 2 12" kicker comps, 2 12" kenwoods, and 3 12" rf p1's wired about 1.34ohms and this amp has handled every one of these. I'm definitely keeping this amp around.

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Nick

Manhattan beach, CA

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Durability
Value
Features
Design
Usability

No problems

May 3, 2010

I've had this amp for about 6 months now and have not had one problem with it. works great

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Q

San Diego

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Value
Features
Design
Usability

Big boom, little $$

April 6, 2010

The amp gives you great bang for your buck. It has a lot of power and doesn't break the bank.

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apollo

Charlotte, NC

Overall
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Value
Features
Design
Usability

For the money, cannot go wrong

March 30, 2010

I have owned this amp for almost a year and overall considering the price I would recommend it. I have it hooked up to 2 10" Polk Momo (300 rms) series subs at 4 ohms and have recently put it in my car setup with same speakers but set at 2 ohms. Both configurations run well. The amp has only gone into protect mode once at high volume. Only had to turn it off for 10 seconds and all was well again. It never gets hot unlike my 4 channel Hifonics amp. The one thing that would make it better but I guess for more cost would be to have screw type 4 gauge wire inputs for both the ground and power. Also wish the gain & freq controls were on the top. Once you put the top cover on, the controls are next to impossible to get to.

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Tyler Wilson

dundalk maryland

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Value
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Usability

great amp

March 16, 2010

I would definitely recommend this amp. I have had it for 6 months so far, its powering three 10" subs, this amp has enough power to get the job done at an extra level than what you would expect. Very loud, strong hits, I really like that it is simple to install and adjust the sound on. Good amp!

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heavensonic

ca

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Value
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Usability

this boom boom is great

February 24, 2010

i have had this amp for almost 2 yrs and man this amp pushes my subs like crazy! I like the way it drives...

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Jojo

San Francisco California

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Value
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Usability

Its an ok amp

February 14, 2010

Sounds pretty strong at 2-ohm but when things get really cranking it shuts off when other amps of the same price range keep going. I switched the wires to 4-ohm, that helped a little but I lost some bass. Kenwood has been really great with helping me, they have great customer service and never leaves me on the back burners. The bottom line is if your not trying to blow out your windows with bass like me then it's an ok amp.

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kenneth r

Gravois Mills, MO

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Value
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Usability

Great bass!

February 11, 2010

I purchased this amp primarily because it matches the KAC-8404 and they look so nice mounted side by side in my truck! It certainly does the job with the JBL CS110! I love good bass! I love my system! I love my system!

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Desmond

Appomattox, VA

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great for price

February 7, 2010

this amp is great coming from some one with a kicker and mtx amps just make sure that you have good wires and a cap

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Nick

Columbus, GA

Overall
Durability
Value
Features
Design
Usability

Kenwood Amp

January 14, 2010

This is a real good amp. I could use a more powerful amp but this one pushes my Kicker 12's pretty good. It hasn't overheated since I had it and its mounted on my kicker box just behind my backseat in my Lincoln LS.

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Gentriginus

Walnut Creek, CA

Overall
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Value
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Usability

Solid amp

December 20, 2009

Im using this to push a 12" P3, and this definitely gets the job done. I'm breaking the sub and the whole car rattles at half volume. Powers the sub really well, and has yet to overheat. The red and blue lights on the amp look tight in my trunk too

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David

KY

Overall
Durability
Value
Features
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Usability

Nice amp

December 15, 2009

i bought two of these amps to power my 4 mtx 10" subs. the amps delivered nice clean power and is a perfect fit for the subs. i would recommend these subs to anyone good price and great quality

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Maxwell

sacramento, CA

Overall
Durability
Value
Features
Design
Usability

KAC-8104D

December 13, 2009

Great amplifier. I have been running this amp @ 2 oms for a year it works perfectly very reliable. very good value for the money

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Brandon

Phoenix, AZ

Overall
Durability
Value
Features
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Usability

Great Amp!!!!

December 12, 2009

I just bought this amp off of Craigslist for $50 and let me tell you this thing bumps!!!! I have it hooked to a Rockford Fosgate Punch 12" HX2 running 500 watts rms @ 2-ohms. I would highly recommend this amp.

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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

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 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 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

The Install Bay IB-CAP1F

True 1.0 Farad Car Audio Capacitor for up to 1000W Max

Your Price $37.99

e2 ECAP1 by Scosche - Mid-Level 1 Farad

Digital 1.0 Farad Car Audio Capacitor for up to 1000W Max

Your Price $49.99

Rockford Fosgate RFC1D - Top of the Line 1 Farad

Digital 1.0 Farad Car Audio Capacitor for up to 1000W Max

Your Price $104.99

Scosche SPL Meter SPL1000F

Handheld boomSTICK measures your SPL range from 60 to 135 dB

Your Price $21.99

AutoSound 2000 CD-104

The ultimate amplifier level setting disc used for evaluation of audio components

Your Price $11.99

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

Product Summary

Manufacturer

Model Number

KAC-8104D

UPC

019048175977

Weight

9.00lbs

Internal SKU

kac8104d

Internal Product ID

11796

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-8104D