--- product_id: 1167613 title: "AR4000D" brand: "boss audio systems" price: "Β£269.07" currency: GBP in_stock: true reviews_count: 13 category: "Boss Audio Systems" url: https://www.desertcart.co.uk/products/1167613-ar4000d store_origin: GB region: United Kingdom --- # 4000W max power @1Ξ© Strappable for 8000W output Class D efficiency tech AR4000D **Brand:** boss audio systems **Price:** Β£269.07 **Availability:** βœ… In Stock ## Summary > 🎡 Feel the Power, Own the Bass β€” Don’t Just Listen, Command It! ## Quick Answers - **What is this?** AR4000D by boss audio systems - **How much does it cost?** Β£269.07 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/1167613-ar4000d) ## Best For - boss audio systems enthusiasts ## Why This Product - Trusted boss audio systems brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Custom Bass Control:** Fine-tune your low-end with variable bass boost, subsonic filter, and low-pass crossover for precision sound. - β€’ **Expandable Soundscape:** Strap two AR4000D amps together to double your power and dominate the bass game. - β€’ **Next-Level Efficiency:** Class D MOSFET design slashes power loss and heat, keeping your setup cool and compact. - β€’ **Sleek & Compact Design:** Slim 14.3” x 6.5” x 2.8” footprint fits anywhere, perfect for the modern car audio enthusiast. - β€’ **Unmatched Power Output:** Push your subwoofer to the limit with a massive 4000 Watts max at 1 Ohm stability. ## Overview The BOSS Audio AR4000D is a high-output Class D monoblock amplifier delivering up to 4000 Watts max power at 1 Ohm, engineered with MOSFET technology for superior efficiency and reduced heat. It features customizable bass controls including variable bass boost, subsonic filter, and low-pass crossover, plus the ability to strap two units for an 8000 Watt powerhouse. Compact and durable, it’s designed for serious subwoofer performance with professional-grade reliability and a 6-year warranty. ## Description Kick your Bass into high gear with the Boss Audio Armor AR4000D Class D Monoblock Amplifier. This powerful 1-Ohm stable Amplifier features 4000 Watts Max Power with a MOSFET power supply to get your tunes rocking. Customize the sound with Variable Low Pass Crossover, Bass Boost and Subsonic Filter. Maximize the Bass with the Remote Subwoofer Control. For double the performance and power, strap on another AR4000D for a total power of 8,000 Watts @2-Ohms. The Armor Series of Amplifiers packs incredible power and performance into a feature-rich slim design for put-it-anywhere convenience. Give power to your playlists with the Boss Audio AR4000D. For further product details, please scroll down. Review: Best car amp for the money! - Bought this thing for under a hundred bucks in January 2017 I believe? Lasted me up until probably 2022 or 2023 I think, which wasn't bad for $125 at the time. And I beat on this thing - loud settings, hot trunk, no ventilation or anything whatsoever. When it finally died, I emailed Boss and they had me send it in and gave me a free replacement - after like 5 years! Great product support. I didn't expect them to do that, but the fact they did it anyways was fantastic customer support. I've since outgrown the need for a dedicated subwoofer in the trunk, but last time I checked it still works. Absolutely great product. I'm also not sure what car amplifiers go for these days from reputable brands, but I'm sure it's much higher than $180. Highly recommend this! Review: Works like a boss!!!!! - UPDATE 11-10-16 After a week Still impressed, did a meter test and it was drawing 50 amps x 12v = 600 watts true rms @ full volume. So I Upgraded my wire and new better battery terminals and 100a fuse holder. Did another meter test and i got 100 amps x 12v = 1200 watts true rms... it blew the fuse holder. So I ordered a better fuse holder with 150a fuse.. will do another update when installed After reading almost all the reviews for this amp I decided to just go for it! Glad I did! I needed an amp the can push (1) 15" Orion HCCA dual 2ohm wired to 1.13ohms exactly. That being said, I got my amp today and installed it my self. I was really nervous at first thinking this amp would not be able to push the sub hard enough and thinking the amp might blow a fuse or something of that matter. Turn it on and I was Amazed by the amount of power it was feeding my Orion. Put it this way, i couldn't even go past 1/4 turn on my bass knob and the head unit past 1/3! The sub was flexing about 3 inches, my hair and beard was vibrating and my truck felt like it was gonna fall apart... I mean the doors were flexing so hard it looked like it wanted to open. And my windows looked like they wanted to chatter... amp settings were set all to minimum except the gain wich I was controlling with my knob. Honestly I'm afraid and excited and nervous to turn it half way thinking the air bags will set off or windows chattering... I drive a 2009 2 door Ranger , with stock head unit and I removed my passenger side seat to e able to fit my 15 inch sub.. it takes up the whole space.. I will update once I crank it up more and run it for a bout 45 min... Extremely happy with this amp and for the price you can't beat it! Hope this review helps.. if it can hammer my competition 15" Orion HCCA it definitely can hammer any other sub out there with ease.. might even blow your sub if your not careful ... As for the negative reviews, well you prob don't know what your doing, not hooked up at the correct ohms the amp requires will definitely blow your amp! Update-1 Just noticed it cracked my front windshield !! ## Features - Power - 4000 Watts Max x 1 @1-Ohm, 2000 Watts Max x 1 @2-Ohms - Class D - Power loss is significantly reduced making the amplifier highly efficient. Excess energy is stored until it’s needed instead of being converted into heat. Reduction in size/weight, reduced power waste, smaller heat sink, compact circuitry - 1 Ohm Stable - Able to continuously power loads of 1 Ohm without encountering difficulties such as overheating. Typically made to power up subwoofers that demand the heavier power load requirements to be able to perform the way they were made to - Strapping Capable - You are able to strap two AR4000D amplifiers and double the power that is being sent to your subwoofer(s). You now have the ability to connect more subwoofers to take advantage of the extra power - Variable Bass Boost - Bass Boost allows you to adjust the low bass within the boost range to just the way you like it - Variable Subsonic Filter - To prevent your subwoofer(s) from bottoming out, the variable subsonic filter filters out frequencies below the subwoofer(s) specified low frequency limits and allows the driver to reach a maximum safe excursion - Variable Low-Pass Crossover - Subwoofers reproduce sound based on a number of different low-range frequencies. You can set exact sound specifications for the bass frequency reproduction - Specs - Dimensions: 14.3” x 6.5” x 2.8”, Weight: 7.96 lbs. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B004RS9UTI | | Best Sellers Rank | #66,083 in Electronics ( See Top 100 in Electronics ) #121 in Car Mono Amplifiers | | Brand | BOSS Audio Systems | | Brand Name | BOSS Audio Systems | | Customer Reviews | 4.1 out of 5 stars 587 Reviews | | Global Trade Identification Number | 00791489116404 | | Included Components | Remote subwoofer level control | | Item Dimensions | 14.3 x 6.5 x 2.8 inches | | Item Type Name | BOSS Audio Systems AR4000D Class D Car Amplifier - 4000 Watts, 1 Ohm Stable, Digital, Monoblock, Mosfet Power Supply, Great for Car Subwoofers | | Item Weight | 8 pounds | | Item dimensions L x W x H | 14.3 x 6.5 x 2.8 inches | | Manufacturer | BOSS AUDIO | | Material Type | Metal | | Maximum Output Power | 4000 watts | | Model | AR4000D | | Mounting Type | Car Mount | | Number of Channels | 1 | | Output Power | 4000 watts | | Part Number | AR4000D | | Specification Met | FCC | | UPC | 803983124578 807032956639 791489116404 | | Voltage | 10 volts | | Warranty Description | 6 Year Platinum Online Dealer Warranty valid only on products Sold / Shipped by Amazon.com. This offer is not valid on purchases made from third party market place sellers | ## Product Details - **Brand:** BOSS Audio Systems - **Item dimensions L x W x H:** 14.3 x 6.5 x 2.8 inches - **Manufacturer:** BOSS AUDIO - **Mounting Type:** Car Mount - **Voltage:** 10 Volts ## Images ![AR4000D - Image 1](https://m.media-amazon.com/images/I/71oVGFsgrlL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Best car amp for the money! *by C***S on July 2, 2026* Bought this thing for under a hundred bucks in January 2017 I believe? Lasted me up until probably 2022 or 2023 I think, which wasn't bad for $125 at the time. And I beat on this thing - loud settings, hot trunk, no ventilation or anything whatsoever. When it finally died, I emailed Boss and they had me send it in and gave me a free replacement - after like 5 years! Great product support. I didn't expect them to do that, but the fact they did it anyways was fantastic customer support. I've since outgrown the need for a dedicated subwoofer in the trunk, but last time I checked it still works. Absolutely great product. I'm also not sure what car amplifiers go for these days from reputable brands, but I'm sure it's much higher than $180. Highly recommend this! ### ⭐⭐⭐⭐⭐ Works like a boss!!!!! *by E***U on October 28, 2016* UPDATE 11-10-16 After a week Still impressed, did a meter test and it was drawing 50 amps x 12v = 600 watts true rms @ full volume. So I Upgraded my wire and new better battery terminals and 100a fuse holder. Did another meter test and i got 100 amps x 12v = 1200 watts true rms... it blew the fuse holder. So I ordered a better fuse holder with 150a fuse.. will do another update when installed After reading almost all the reviews for this amp I decided to just go for it! Glad I did! I needed an amp the can push (1) 15" Orion HCCA dual 2ohm wired to 1.13ohms exactly. That being said, I got my amp today and installed it my self. I was really nervous at first thinking this amp would not be able to push the sub hard enough and thinking the amp might blow a fuse or something of that matter. Turn it on and I was Amazed by the amount of power it was feeding my Orion. Put it this way, i couldn't even go past 1/4 turn on my bass knob and the head unit past 1/3! The sub was flexing about 3 inches, my hair and beard was vibrating and my truck felt like it was gonna fall apart... I mean the doors were flexing so hard it looked like it wanted to open. And my windows looked like they wanted to chatter... amp settings were set all to minimum except the gain wich I was controlling with my knob. Honestly I'm afraid and excited and nervous to turn it half way thinking the air bags will set off or windows chattering... I drive a 2009 2 door Ranger , with stock head unit and I removed my passenger side seat to e able to fit my 15 inch sub.. it takes up the whole space.. I will update once I crank it up more and run it for a bout 45 min... Extremely happy with this amp and for the price you can't beat it! Hope this review helps.. if it can hammer my competition 15" Orion HCCA it definitely can hammer any other sub out there with ease.. might even blow your sub if your not careful ... As for the negative reviews, well you prob don't know what your doing, not hooked up at the correct ohms the amp requires will definitely blow your amp! Update-1 Just noticed it cracked my front windshield !! ### ⭐ Cool Ithought, I will just return it for another ... *by C***E on April 29, 2015* Due to the weather here in Texas it's been in my closet since Feb 21. When I finally attempted to install, it didn't work. Cool Ithought, I will just return it for another considering I order alot of electronics (I have 12 cars, so I get stuff often)..........NOPE. Found out it is unreturnable. Love Boss and the shipper but won't order from them nor AMAZON again. ## Frequently Bought Together - BOSS Audio Systems AR4000D Class D Car Amplifier - 4000 Watts, 1 Ohm Stable, Digital, Monoblock, Mosfet Power Supply, Great for Car Subwoofers - BOSS Audio Systems KIT2 8 Gauge Complete Car Amplifier Installation Wiring Kit with Power Cables, Ground Cables, Turn-On Wire, Speaker Wire, Terminals - BOSS Audio Systems CAP8 Car Capacitor - 8 Farad, Energy Storage, Enhanced Bass From Stereo, Warning Reverse Polarity Tone, Voltage Overload Low Battery Voltage Led --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/1167613-ar4000d](https://www.desertcart.co.uk/products/1167613-ar4000d) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-07-31*