Boss AR4000D | 4000 Watt ARMOR Series Monoblock Amplifier

Boss AR4000D

4000W Max Monoblock ARMOR Series Class-D Car Amplifier

4000W Max Monoblock ARMOR Series Class-D Car Amplifier

• RMS: 1600W x 1 @ 4 ohms
• Peak: 3000W x 1 @ 2 ohms, 4000W x 1 @ 1 ohm
• Strappable Peak: 6000W x 1 @ 2 ohms
• Bass Boost 0-12 dB
• Heavy Duty Aluminum Alloy Heatsink
• Dimensions: 14-1/3"W x 5"D x 2-8/10"H


List price $349.95
Save: $171.96


In Stock with warranty
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Order within 14 hrs 47 mins to ship 9/18

FREE delivery: Tue, Sept. 21 to VA.

Item Condition: Brand new

The item is brand new and not used.


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BUNDLE AND SAVE (2 offers)

You will need an installation kit to install your amp, and the Belva BAK42 is the perfect kit for this amp. Simply click "Add Both to Cart" and receive 15% off the amp kit. This offer cannot be combined with any other coupons or offers.

Boss AR4000D

15% off

Priced separately $212 98

Bundle Savings of $5 25

Total bundle price:

$207 73

While supplies last, get an additional 25% off the Belva 1.0 Farad Capacitor with 4 Gauge Amplifier Wiring Kit. This is a 2000 Watt Max Handling Amp Kit that provides the needed juice, flow and wiring for your new amplifier.

Boss AR4000D

25% off

Priced separately $232 98

Bundle Savings of $13 75

Total bundle price:

$219 23


Authorized dealer

General Features:

  • Monoblock ARMOR Series Class D Car Amplifier
  • RMS Power Rating:
    • 4 ohms: 750 watts x 1 chan.
    • 2 ohms: 1500 watts x 1 chan.
    • 1 ohm: 3000 watts x 1 chan.
    • 2 ohms Strapped Bridged: 6000 watts x 1 chan.
  • Max Power: 4000 watts
  • Pulse Width Modulated MOSFET power supply
  • Wired remote bass level control included
  • LED power (green) and protect (red) indicators
  • Variable Bass Boost (0 to +18 dB bass boost at 50 Hz)
  • Soft start turn-on
  • Mono channel operation
  • 3-way protection circuitry (thermal, overload, and speaker short protection)
  • Heavy duty aluminum alloy heat-sink for extreme heat dissipation
  • Nickel-plated RCA level inputs
  • Nickel-plated screw terminals
  • Total Harmonic Distortion (THD): 0.01%
  • Signal to Noise Ration: 105 dB
  • Variable low-pass filter (50-150 Hz, 24 dB/octave)
  • Variable subsonic filter (15-40 Hz, 24 dB/octave)
  • Damping factor: 125
  • Frequency response: 15 - 150 Hz
  • 4 gauge power and ground wiring is required for installation. Contact us for information regarding a discount on select amplifier kits from our website when purchased together with this amplifier.
  • Dimensions: 14-1/3"W x 5"D x 2-8/10"H
  • Authorized Platinum Internet Dealer
  • 1 year Sonic Electronix, and 5 years Manufacturer's warranty

Check out the AR4000D Owner's Manual

Power Specifications - Subwoofer Channel
RMS Power @ 4 ohms
750 watts x 1 channels
RMS Power @ 2 ohms
1500 watts x 1 channels
RMS Power @ 1 ohm
3000 watts x 1 channels
Power Specifications - Full Range Channels
Peak Power @ 4 ohms
1500 watts x 1 channels
Peak Power @ 2 ohms
2000 watts x 1 channels
Peak Power @ 1 ohm
4000 watts x 1 channels
Amplifier Specifications
Amplifier Series
Armor (Boss)
Marine Certified
Amplifier Class
Number of Channels
1 - Mono
Total Peak Power Output
4000 watts
Total RMS Power Output
3000 watts
Maximum Input Gauge Size
Minimum Impedance Unbridged
1 ohms
Minimum Impedance Bridged
Not Bridgeable
THD at Rated RMS Power
Speaker Level Inputs
Preamp Outputs
Built-in Crossover
Low-Pass (LP)
Low-Pass Crossover Frequency
50 - 150 Hz
Subsonic Filter
15 - 40 Hz
Signal-to-Noise Ratio
105 dB
Bass Boost
0 - 12 dB
Bass/Gain Remote
Fan Cooled
Fuse Rating
40A x 3 
Total Fuse Rating
CEA-2006 Compliant
Sonic Certified Amplifier
Not Tested
Amp Bluetooth Connectivity
Hi-Res Certified
Authorized Dealer
Authorized Dealer
Authorized Dealer
What is in the box?
WITB: Amplifiers
Wired gain knob (wire separate)
Four spare fuses
User manual
Warranty/Registration card
Warranty and Return Policy
Parts Warranty Duration
6 years
Labor Warranty Duration
6 years
Warranty Provider
Boss AR4000D

Boss AR4000D



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Overall rating distribution

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By feature average rating



November 9, 2012


I have this amp hooked up to 4 kicker comps and it pushes them hard and loud and it has never over heated on me I really recommend this amp it has a lot of power and a good price.


found this helpful.


September 23, 2014

Durable Amp

this amp keeps up with my subs no matter what I hook up. And yes it does work at 1 Ohm.


found this helpful.


July 13, 2014

bangin' BOSS

Great amp, got two jl15's and they slam. I have its little brother the AR2500 powering two jl12's that pump hard. BOSS knows how to make quality budget products, looks good too. Total confidence in this brand and anything from Sonic Electronics is a safe bet. I plan on doubling what i have, strapping the AR.4000 to get the 8000watts and get another 2 15's then just getting another AR2500 for 2 more 12's. and maybe some 8's or 10's depending what deals sonic electronics has on ;)

PS Every amp gets hot, just make sure it gets good air flow and you have a really good ground, and you wont have problems because of it over heating.


found this helpful.


February 14, 2014

Great deal

The Boss amp works great. It arrived on time no delays. All reps where very helpful, I would always use Sonic Electronix for all of my electronic needs.


found this helpful.


December 4, 2013

Great amp but doesn't put out rated power

Sounds great, remote gain control works great, has a good HPF and subsonic filter, and the gain was easy to set to match the output from my bass processor. I'm getting about 700 watts rms output at 2 ohms and about 1050 watts rms at 1 ohm (measured with true RMS meters and factoring in group delay, impedence rise, etc.). This is with true 4 AWG pure copper power/ground cable and big 3 upgrade running on the stock alternator and battery (in 8th Gen Honda Accord). It appears to be 1 ohm stable although it's specified only down to 2 ohms. I ran it at 2 ohms for several months and am current running it at 1 ohm for past couple months. It went into protect mode (overheated) once early on before I upgraded the subwoofer speaker wire from 14 to 10 gauge and performed the big 3 upgrade.


found this helpful.


March 23, 2013

Best Amp I've Had

I just bought one of these today and it makes my 2 alpine type e 10" subs bang hard without even breaking a sweat. You will need wiring bigger than 8 gauge cuz that's what I currently have in there and it's starving for power at points but it wouldn't be once I put my 2 gauge in very happy


found this helpful.


December 5, 2012


man i got these on 3 15" phantom boss subs and im ready for any body out there and by the way 8 6/2 speakers in the doors and 12 6x9 so bring it on and outside p a speakers.


found this helpful.


October 7, 2013

just luv this company. been around 4 awhile. never let me dwn. sincerely goldegal59.

Haven't installed system yet. For my wife & I. Thank u.


found this helpful.

Bass Head

February 24, 2015

Boss Is Hitting Low Notes!

Man I hear individuals hate on and bash Boss Audio but I'm here to tell u they either don't know how to install or hook up sound system equipment are just trying to get you to get jipped like they buddy or relative or even themselves by buying Upper class High end Name Brands. Iv'e had a couple of Boss class D amps and my uncle use to work in Audio shops fsince the mid 90's so he's 4-5 star experienced in hooking everythang up properly he tuned my amp set my radio spl settings and let me tell you Hard hitting Bass remote button is only on bout 4 to 5 it goes to 18, amp gain almost halfway everythang on my head unit is -negative man it is Rumble in The Trunk! I would say easy 725 watts @ 4 OHMS. Great for under $120 buks. As long as you don't have Competition woofers that require major wattage like 1000 watts eachRMS each speaker Boss will push reasonable DVC woofers that don't require monster watts. Install properly, Tune amp thoroughly, Set Head unit, WARNING The Amps Remote Control is not to be used as a volume button. Follow these steps thru and thru and you should be kosher. BASS=BOSS #I'm a Fan!


found this helpful.


March 19, 2015

WHAT?!!? So confused

First I gotta say...I'm running 0 gauge ofc wire for power and ground, optima yellow top, 120amp alternator, 2 x Alpine 5th gen type R 12" at 1 ohm.
Was running a soundstream tx1.2000d amplifier that I bought new for $450. BLEW it within 50 minutes of run time playing Drake - Over.
Hooked this BOSS AR4000D...and let me tell you that I have had it for just over a month running exact same gear, and I cannot get it into protection mode haha!
Can't believe how good this amp is! And only paid $110!
Will definitely get another own and strap them together, it literally surprises me everyday how it handles!
GET THEM! stop listening to people that say these amps are the worst around...because it's definitely showing up my soundstream amp!


found this helpful.


March 29, 2015

Overall great starter amp.

Great amp for anyone who is just starting up. Wattage and RSM is over rated no way near to what it says maybe it 25% of what the manufacturer states.


found this helpful.


May 22, 2015

boss armor 4000d

Very pleased with this amp, i have it running 4-12'' rockford fosgate subs and it pounds. i personally think that with this amp, boss is finally making a name for themselves. i will be buying 1 more amp to push 8-12'' subs easily.


found this helpful.


August 4, 2018

Got what I expected

This amp is listed at 4000 watts and is not but for the price I got a great amp that adds plenty of thump to my system. Definitely recommend.


found this helpful.

Bass Mekanik

July 24, 2015

Fact Not Fiction

The Boss AR4000-D Amp Let me be 100% Truthful I read alot of reviews about Boss amps mostly bad reviews, But I know the reason why they leave bad reviews,They come from people who are not knowledgable about audio equipment and what factors need to be considered when purchasing amps, wiring kits,and head units etc.. Class d Boss amps will push any subwoofers that can handle 600 watts RMS as a pair meaning 300 RMS each sub, so if you got woofers that equal 2000 watts as a pair meaning 1000 RMS each sub and you put a Boss 3000 or 4000 class D 1 amp on them what do you expect read the specs in the amp guide info it tells the performance. And make sure you have the right size box set your head unit right and tune your amp according to your sub frequency and use true to size gauge amp wiring kits and use the remote gain control that comes with your Boss amp & hook up your equipment the right way and I promise you Boss won't dissappoint. Boss amps do overate their numbers in wattage though i'll admit that but its simple this amp puts out nowhere near 4000 watts but i scoped it and i can assure you it puts out 1600 @1ohm,1200 @2ohms,& 800@4ohms. If you ask me cheap price for this amount of wattage. And i have always been the type of person that test an item before i go off of other people's opinion all reviews aren't facts just other people's opinions most of the time. With all this said when i tweaked my settings on my head unit tweaked the amp settings to match my sub's frequency and adjusted my Remote control gain for the amp and by the way my amp is about at 2:00 pm that's like 12 -13 decibels it goes to 18 decibels thats all the way up so i have it turned up 2-3 notches past half way and my remote control gain isn't even half way and my whole car vibrates no flex zone.My head unit goes to 42 and on just 19-21 it's way to loud and make sure the head unit volts are 5 and up that's a important factor also. So when you follow these simple rules i promise you nothing but excellent results. Boss AR4000D is a great amp i will buy another one with no Problem. Another great Boss amp to buy to would be The Boss 3400D Riot Amp I owned it also had it for 8 months and great performance no cons at all sold it to my co-worker still going strong and hard til this day. I rock wit Boss they have great tweeters also i have owned like 5 sets and they all are still kicking loud and clear.


found this helpful.


February 4, 2016

Wow small like a tablet bass like a monster

Using it to push an Orion HCCA 12.2 at 1 ohm stable. The installers were like no way this little thing. Well powered on and boom monster 2 days so far and hitting so effin hard I'm scared myself to death. After an he did go into protect then after 5 mins cooling down worked perfectly... Boss is a boss price is amazing for the real watts you get here


found this helpful.

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4000W Max Monoblock ARMOR Series Class-D Car Amplifier


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