AR4000D Class D Monoblock Car Amplifier - 4000 High Output, 1 Ohm, Low Level Inputs, Low Pass Crossover, MOSFET, Bass for Subwoofer

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!

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 !!

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.

So a year and a half ago, I was gifted 2 infinity reference series 12 inch subs from my brother. it was clear that I needed a large amp to power it. I had an mtx 750, and it didn't work as well as I expected it. but then I saw a 2000 watt boss for 75 bucks. I decided to go for it. it has been running at full power since I purchased it. I bought 2 twelve inch Rockford fosgate punch 12s and found out that they little 2000 watt amp would not push all 4. so I brought out the big guns. I ordered 2 ar4000 monoblock amps, 1/0 pure oxygen free copper, going to a .5 farad cap and a 2 farad cap. split into 2 lengths of 4 gauge jl audio pure copper. I set it up put the bass level to full. big mistake. I cracked my windshield, edge to edge, on the passenger side of my car. my mirror vibrated all the way down until it was looking at my dash. my check engine light came on and made my car misfire for a few seconds. and my neighbors car alarm went off and in turn made them call the police on me. I'm seriously impressed with they whole armor line of amps from boss. I might just be purchasing another! you will need a spare battery to run these at their peak, because they will kill your battery on extended trips with the level all the way up. Edit: now have 6 subs, 4 alpine bassline 12' 1 infinity reference, and 1 12 inch sony xplode 1200 watt, with a total max load of 6542 watts. I had a failure in one of the other infinity subs so I replaced it.pushes all of them very well. my best friend left cookies on all my subs while I was working on them, and when I went to turn it on, shot cookie bits all over my car. 2nd edit. I am now running 2 soundqubed hdc3.18 subs in a 12 cube box 35z at 0.5 ohm. It pushed them hard but clips if my voltage goes uder 13.5. It also gets very ho.

This amp has amazing power, I have it hook up to my xs power D3400 Main battery With 4 guage Nvx amp kit, I am soon installing an XS Power XP 3000 battery for my trunk and 0 guage Nvx wire.... Anyway this amp has the potential of getting really loud, I Have The BOSS AR 4000 amp pushing 2 Rockford fosgate P3 s . This amp puts out Clean loud bass, I only have the gain about a quarter of the up and it hits hard, so i would highly Recommend this AR 4000 its very affordable and it puts out clean bass response!

If you are reading this review, first thing to note is this is NOT a 4000 watt amp. I recently purchased this amp and ran it through the paces on my Amp Dyno and also checked it out in detail. Here's what I found. Amp itself has a really cool heatsink, looks much nicer than most amps costing much more. It is aluminum and seems to have great fit and finish. It has RCA inputs and outputs and includes a bass remote and cable. Also includes extra fuses and mounting hardware...and even a Boss sticker for your car! I've been curious about the actual power output of this amp for a while. Logic tells us an amplifier with (3) 40A fuses is not going to deliver 4000 watts of output. In a perfect world, with 15 volts of input and 100% efficiency, that's only 1800 watts. The world is not perfect, there is no 100% efficient amplifiers and most people can't provide 15 volts of continuous input. That said, let's see the true measurements captured by my SMD/D'Amore Engineering AD-1 Amp Dyno (all RMS figures at 40Hz): 4 ohms certified (to 1% THD) - 433 watts at 14.25 volts 2 ohms certified (to 1% THD) - 710 watts at 14.04 volts 1 ohm certified (to 1% THD) - 908 watts at 13.84 volts 1 ohm uncertified (to clipping) - 1175 watts at 13.47 volts 1 ohm dynamic (subwoofer simulation) - 1425 watts at 13.79 volts You can see the full video review on YouTube at my channel BigDWiz. You can also search for Boss AR4000D Amp Dyno Test and find the video to see more about this amp. Overall, I had very low expectations for this amp, but was pleased on many accounts. Build quality/design are very nice, but the bloated "MAX" power ratings are something I wish manufacturers would stop using. The power this amp puts out for the price makes it a great bargain for those just getting started in aftermarket car audio or those who want some thump without investing a lot of money. I can't comment about long term reliability and I need to investigate the "6yr platinum online dealer warranty" as mentioned by Amazon. If this is indeed true, how can you go wrong?

Well after my 2000 watt crunch amp fried after 10 years [but this amp never flexed unless put at the max on a A/B amp without heat issues and my back seat folded down for air...lol] ...but i think my ground was the culprit. Always attach to body near the amp, previous in the engine body mount...can be a source of resistance in the line for some reason. Terminal melted on Crunch amp... Now back to this BOSS HOGG amp; ummm its barely turned up on my two 12 inch Infinity @ 2x600 RMS subs. Now this amp flex on low continuous bass notes without distortion or effort even on low power. Never had that before; does not have heat issues either..but its turned down ...lol...so i dont think it will unless its one of these hundred degree days in Houston. Make sure you run your engine; unless you have it turned down some serious power in this amp. This amp was #1 rated and it is. LPF & HPF for any newbies has to be changed.

To my Surprise it worked exceptionally well literally pounded my car with 2 15" subs it broke after 3 months use but damn I don't regret buying it I just Bought a Hifonics 2400 watt amp that costed me more than double what this one did and it sounds exactly the same I'm actually mad at my Self for not just buying another one of these overall this BOSS amp blew me away for the price it did it's job hopefully it does the same for you Thank you Boss you have a customer for life

Super

Really good product for the price, I would recommend these amps to anyone looking for good quality, good solid power, and great performance.

Running 4000watts max off these 2 mafkas, have them wired to 1.34 ohms, barely turned up a quarter on amp and they just slam, no problems yet, I’ll try keep an update on it as the months go on, you just gotta do your studying on your wiring job and what works best they maybe cheap but can compete with pro amps when set up properly

Wouldn’t buy this again

its not 4000 watts but it slams my subs great amp so far am happy with it