Absolutely EVERYTHING you need to know about POWERUS amplifiers
Вставка
- Опубліковано 14 лип 2024
- This ended up being WAAYY longer than I intended. I plan on making a shorter roundup of all the current Brazilian brands on offer soon that should be quicker, but I have added contents to the progress bar so you can check out the most important bits to you. Spoiler, these are SICK AMPS!!
Powerus did not sponsor or send in any amplifiers for this review. I simply reached out to the UK supplier and got one sent over to look at, and send back.
0:00 Intro
0:42 About Brazilian amplifiers
1:49 About fullbridge amplifiers
3:27 External overview
8:32 Cooling
9:41 Power supply architecture
13:41 Output architecture
18:09 Preamp circuit
22:34 Build / assembly quality
28:38 Serviceability & design features
39:41 Switching frequencies
47:09 Testing preamp filter behaviour
55:23 Limiter functionality
1:00:15 Other nice design features
1:03:38 Current draw balancing
1:06:00 Smaller 1600w model
1:07:01 Final thoughts - Розваги
I love how Barevids doesnt really do filler video just to put out content. When he puts out a video he has something to say. Long informative well produced videos. 👍👍 Love these long and detailed videos. Amazing job brother.
That makes two (2) of us. Sam is all about the pie "filling", not the "crust". He is a straight shooter as well. Top quality video content for sure. Thanks a lot Sam! Fred
I've only watched a few so far but they've all been great
What a gift you are to the audio community my friend! The current generation of audio enthusiasts have no idea how back in the day one had to "Pay Their Dues" over many years to learn what you are giving away for free. There were no sources of easy answers and information. I have been around long enough to know that you are the real deal. Your no nonsense, to the point, "Fluff-Free" content is refreshing to say the least. I love the way you make a statement, back it up with fact, and make a real world comparison to similar products. It really puts things into perspective. Keep up the fantastic work!
Couldn't agree more dude🎉👌🤲💪 he is a gold in audio community and he is in general great human being all together 🤲 very kind and honest 🙏
Thanks so much for sharing your knowledge with us. I wish you you were my electronics teacher back in high school 35 years ago. Even though I can understand maybe 30% of what your saying as my brain can't process what you teach that fast lol. I've always loved electronics and struggle with it being 50 now doesn't really help but I'm still as inspired as I watch your videos and explain it the way you do really helps. Thanks Mike.
Sam you deserve royalties!!! imma hit these guys up NOW to try get you some royalties!
thanks for the epic breakdown bro, this is the first amp i have seen ever, that will possibly eventually fail because of old mosfets!
Finally a modern amp worthy of comparison to the pure technical art designed and manufactured in the mid 90's!
Dude you are killing it. I have watched a ton of car audio videos and none of them are even close to the great info you provide. Great job.
Absolutely superb run down! Tremendous respect and appreciation. -Cheers mate
Such an excellent breakdown on this amp. You have sold this amp legitimately and for all the right reasons. WELL DONE, Sam!
Very informative! I love the comprehensive breakdowns!
Love the review I'll be checking these out for my current build!!
Best possible review ever, I didnt skip a second. I think now I need to buy one of these, lol
É nós, melhor amplificador Brasileiro!!!
Wow I wish you did this with every amp you had , you’re an awesome tech , you know how to explain in simple English 👍🏻👍🏻👍🏻
Great video B. It's one thing to say an amp is good because of its brand, but it's something totally different to show why an amp is good or better than other amps. You should do a series of these videos covering the many brands of amplifiers if you haven't already. I don't have the knowledge to recognize all the points you were making, but your explanation made it possible to see all the points you made. Again, great video. Thanks for the content.
Great video as usual Sam.
Thank you very much for that video very educational I really like how you break down things so we can learn keep up the good work UA-cam should pay you nuff respect youth 👍👍
Great video man. Love how you put sections in the video as well sweet 🤙. Also congrats on your new place man🎉 hopefully Big D will put one on his bench.
It's already one video in youtube from this amp... Look for it powerus 8000 Dyno
Excellent!... So much information.... I am loving this
I really like the drive circuit, kind of like a Zenon with the buffer transistors between the drive and the mosfets. Really cool looking amp, I would really like to see the 15k and hear if it is as good as this one is to you. Thank you fro another great and informative video!!
Absolutely fantastic full bridge amplifier. Definitely designed by someone with knowlegde about High-current applications. Finally an amp without a PIC IC 🙌
Very beefy drive circuits, and I'm a big fan of component markings on the board. Thx for the review man 😁
Great ampfilers I've sold many here in canada and nothing but good results. These Powerus amps are no joke
What site do you sell thru?
@@dennycote6339 no website available at the moment for Powerus depending where you are living I can pass on the distributors information for you for purchases
Bro how u turning the 10k powerus?
I've always been a hardcore believer in "Korean" amps. I bought a Banda Viking 8k because I was curious. My expectations were low. I ran the Banda on my Resilient Sounds Platinum 18". My God did that amp surprise me! I love this amp! Soooop much power! Only running 48Ah lifepo4 so plenty of power.
Amazing informative video. 👌
Excellent video
Great video keep up the good work
Barevids, I've installed my SD 8k, running two gz hydrogen 12lvs, wired to 4ohms, I've never ran brazillion, or uk audio ,I've gotta say ,I love it, the sd sounds better than the prior zapco, noticeable improvement, lots of headroom !! I hope you do a breakdown of a sd 8k soon ,and the gz 12lvs get low!!!
Well said. This new generation of kids are going around spreading that the Brazilian is the inventor of the Full Bridge amp board.
Back in 2000 I had a few of the USAmps VLX 400. From what I was told back when I bought these amps is that Jack “the owner of USAmps” took 2 half bridge amps and linked them together to make a full bridge amp.
You were lied to. What he meant was he strapped two amps.
2 Strapped half bridges becomes a full bridge albeit in 2 different cases. This is why you cant "Strap" a full bridge. Strapping involves inverting one amps input signal in relation to phase with the other resulting in one amp making positive half of the sine wave and the other making negative half. This is all just in relation to the original signal, and is the reason it is VERY important that both amps are putting out as close as possible rail voltage so the combined output sinewave is symmetrical. Linking the Negative speaker outputs together and using the positives makes a complete Sinewave, think of it as 1 amplifier makes top of sine wave, and other makes the bottom but in all honesty positive and negative is relative in the AC signal that you end up with depending on phase.@@nathantaufer7670
I happen to have a VLX400 which is indeed 2 amplifier boards inside one huge case and it is indeed strapped. They are 2 identical boards but one is missing the input section. I will dig it out of my storage unit to confirm as I haven't looked at it in 10 years but when I replaced all the TIP35C and TIP36C outputs to refresh it @jasonnea's comment was what I feel to be correct. Mine is anodized Purple, and one of the early models that have square endcaps. I owned TrafficJamz Inc in Palatka FLorida, about 45 min from Gainesville where they were handmade in an old church so I saw a lot of USAmps and used they to compete for a while. My personal favorite is the 50HC, with the 100HC being a close second. These amps didn't have an EQ or Crossover, just a pair of inputs and a gain with some 8gauge power wires hanging out of a grommet. It was common to hear people say you could "Weld with them", which really just meant they were hard to burn up and were low ohm stable, but I swear everyone said that back in the day.
I SWEAR Keisight should sponsor you and give you the best equipment you really know your stuff about circuits
I bought the smart 8 k because of your recommendation. Almost wish I would of seen this first. Thanks for your insight.
Whatching that made my love my amp so much 🤣🤲👌 its sitting under my bed in the wrapped duvet ✨🤓🤣 waiting for his time 🤲😎🤣
Bless you bro for your time on these videos❤ absolutely amazing information was here to watch🎉
Budget gem or bust page aka Ryan Blankenship did a dyno of the 8k and did really well on the dyno
yes he did.....11,000+ watts dynamic at 1 ohm
Mosfets are amazing, they are like capacitor, transformer and transistor all in one. I read that they were not efficient and suffered overheating in the early one's in the 1950's, I wonder how much they improved since.
Whe have a powerus 10k powering 4 15 inch subs in a explorer. One day the voice coil of one sub got shorted and the amplifier got into protect everytime the owner turned up the volume, if it was a taramps would have blown up before the protection kicked in. Solid and extremely powerful amplifiers, the best of Brazil IMO.
I've ran a Taramps amp into the dirt for testing purposes. 11v.. clipped into red. Shit ground etc... gone into protect multiple times. That amp still works like new today. Keep your misinformation bullshit and assumptions to yourself
@@crunkwun Let's be honest...most of these clowns take Taramps and run them on 4 gauge wire with no lithium/agms and a stock alt and complain when they shit the bed. Do the same with a POWERUS and theyll fo the same thing.
Comprehensive m8 👍 hopfully big D can get one for dyno testing.
Budget gem or budget bust did a dyno run with one. It did good check it out.
@@matt-be8kt Thanks I will
These full bridge amps are some of the best full bridge im came across.
proper job
Very good content on video amp. explaining amp. Gust
The 2 thumbs down are EMF and his pre-orders
EMF have great amplifiers
@@Mr.NpK143 EMF amplifiers are teampie amplifiers from alibaba. He gets you to preorder to bankroll the orders and you wait like 6 months if your lucky for it to arrive. Might as well order from alibaba direct. He does not have a amp line . He puts his name on a cookie cutter amp and says it’s his. There is nothing wrong with this practice at all. I have nothing against it really lots of people do it but please don’t pretend it’s your tech. I don’t like his video model. Do I watch? Yes. Why? Because I have to be aware of all that’s out there good and bad. If you don’t believe me on his amps look it up. I’m not talking trash these are facts. He also talk quite a bit of trash on others. He can’t make a video on just his laurels. It’s always how everyone else is bad etc.
@@angelvip2474 I'm well aware if the preorders he has and the extended wait just like Collin with wolfram, but still the cookie cutters amp is a well built Korea board amplifier. And even in this video Sam mentioned 80hz on these Brazilian boards aren't where we are here in the states for subs. He stated the significant difference in sound quality when on subs. Even if you barely touch the lpf he suggests you'll be at 150hz which is not where subs want to be. Is this a great amp? Yes! To ridicule a product is one thing, but the company is another. I agree with you mostly, but this amp doesn't hold a candle next to a Korean in it's class
@@Mr.NpK143 it prob doesn't hold a candle. Either way. I don't deal with cookie cutter brands at my shop. Again I watch everything to see what's out there. My customers are more in line with SQ. Spl is an extremely small segment if any at my shop. We deal more with Mosconi Focal JL and such. But again I like to see what's out there. Market is too flooded with these amps. I also use measuring equipment for all my settings so the dials really doesn't mean much too me.👍
@@angelvip2474 to each it's own. I wish you well with your business. I'm just leaving Tampa FL after a days fun of the Concert Car Showdown which is an MECA event. And honestly they're hasn't been a powerus setup in this certified competition or any other I've attended. Maybe soon, but not now. Everybody is entitled to their own frame of music. Whether cookie cutters or not you can't do anything by yourself. There's also a competition coming up in Orlando Fl. this weekend, and another big boi at Lucas Stadium in Indiana. Maybe I'll see powerus there
I've got a PW1600 on order to drive a single 10 (DD SL710) in a sealed box. Any thoughts on being able to modify the slope of the low pass? I'm adding this to a factory system (JL Wrangler) and using an Audio Control LC2i to give it a signal so don't really want to have to add another component.
Just installed one of my brand new pw8000s and unfortunately it seems to be doa. It shows no fault lights at all, but it will not output voltage on the speaker terminals. My other pw8000 works just fine. Just waiting to hear back from PowerUS, hopefully they can help me.
amazing tks
Idea for another video sam.
For us that old older amps from like 2017. That we run hard.
How to give them a freshen up to maintain reliability. Ie change out thermal paste. Check caps. Solder getting average 🤷♂️. Just an idea
What's up barevids. Just want to say I watch and enjoy your vids and knowledge on amplifiers, subs and car audio period. I'm a car audio competitor from Pittsburgh Pa. I been into car audio since 1990 when I got my Driver's license at age 25. But your never too old to learn. I have 737 trophies to date in car audio. So I have a question. I'm currently running 8-Taramp MD8Ks. The preamp settings, like the LPF, exactly where should that be set? I actually turn it all the way to the right. I make that setting on my HU to 80hz. Since the HU is the main brains of the system, I figure it controls everything. Now I am running line driver eq's as well. I use to set my amps the same way, but I noticed most competitors turn that setting off: (to the right). Also is 80hz too high? That's another setting I learned that competitors set it at. No I don't play frequencies' that high, lol. But I do Burp and street beat day to day as well. My wall is tuned to 34hz. My resonate frequency of my car is 43hz. so that's the test tune I burp. I also run most of my amps at .5ohm. which is .6ohm on my fluke. I've had my MDs this way for 2yrs now with no issues. I rise to 1.4ohm. I've ran all my amps @.5ohm rather chinese, Korean, or Brazilian.
you have the perfect voice for an F1 commentator
Ayyyeeeee, lol
Thought about getting a Sundown SFB amp on sale to power my new 15s, but haven't heard many good things about them so far. Might be trying one of these amps.
The SFB are pretty awful. Theae are in a whole different league.
@@barevids
Where can I get one to buy? Not seeing any on amazon. Is there a distributor in USA and what's the location?
@@shawnelliott3257 IDK bro I'm from the UK lol
@@barevids
OK kool. I lived in London for a little while. Are these readily available in stores over there?
@@shawnelliott3257 there's a UK distributor, yes. There aren't "stores" as such there's just one place you order online. Audio scene is very small over here.
Also are you using server psus for your bench? I use these 1200 watt units with a board to combine the output on them
Thanks
You should have put some affiliate links in the description 😉, I'm sure alot of people will by these from the video an you could be getting that kick back👍
You are awesome! Wish I would've pursued an education in electronics. I has a free pass. My dad was a tech ror Montgomery Ward, he fixed TVs, srereos, two way radio, warshers, dryers, ect. If it was broke, he could fix it. He tried to get me to pay attention, but I was too busy at the keggers..lol.. He's long gone now. I'm now 53 and trying to understand all the shit you said about that amp. :)
I see youre familiar with ‘paraflex’ subwoofers. Regarding the kickdrum issue you noted in this review would you drive the HF biased design enclosures with this? Paraflex is hungry and the drivers used are often stiff..?
How do you feel about dynamic power ofxan amp? I always hear people say the dynamic power of an amp doesn't matter. Personally i think would be important.
Hi thanks for this info and have to repair 2 of them how can get diagrams or information to test them they goes to a protection. Need it asap
I.D.G.A.F. lol. Great information. I had no clue about these. Thank you.
What is this thing between the transistor and the body of the amp? and what is it for?
Was wondering about this brand.
Audio to PWM Conversion high/low side is done by the SG3525 and LM358 chips?
you mentioned how the components in the Taramps arent secured as well as they should be or could be. if i wanted to take some preventative steps to secure them more tightly and keep it from being an issue in the future, what sort of adhesive would you recomend i use to better secure them? just regular hot glue from a glue gun, e6000, CA? thank you for all of the great info
I wouldn't use hot glue because it would become soft again when the amp warms up from use. I would use a good quality silicone that you can get at any hardware store
Question, so if I'm correct sometimes I hear you saying some amps only use half of the sine wave. And some use the upper and lower +/- parts. Is there any advantage or db boost or does it make a subwoofer say any better when using the latter of the two?
More Barevids videos explaining difference between full and half bridge amps:
ua-cam.com/video/b6tyjXSHvGg/v-deo.html
ua-cam.com/video/ni_IM_wcfao/v-deo.html
ua-cam.com/video/PcHJEARRlag/v-deo.html
One hour POWERUS commercial, no big deal it does look like a very well built amp.
Would be a commercial if they paid me to make this and reviewed it before I posted. I made this completely off my own back since we have a powerus distro in the UK and I wanted to see what they were like. If they were terrible, trust that I wouldn't have held back one bit, like with the Phoenix gold video. I only care for giving people information about the circuit. These ones just happen to be epic and I respect the designers massively.
@@barevids if I offended you I'm terribly sorry, just kind of a joke really. I love every one of your videos and your knowledge is crazy on car amps.
Barevids can I run a dual 2ohm sub on a stetsom 6k5eq will box rise help rise to 2ohm plus? The information will help alot thanks.
If you don't mind. Do you know the MSRP of that amp I can do the US currency conversion on my end. The only distributor that I have got a price from is marking up ridiculously high, and I'm sure that it is not anywhere near the price. Let's just say I could get a Korean overbuilt amp that would do about the same rated power at the same cost.
@barevids Can you wire the 1 ohm Powerus PWM15000 to half ohm safely because of impedance rise? I know they make a .5 ohm version but I wanna get full power on music and doubt it will ever seen .5 ohm while playing music. Thanks.
I seen that there's a couple opened spots to add Moffett on the output section and it also looks like there's an open spot to add rail caps is that for the 10K or can you add more mosfets in a cap to up the performance of this amplifier? Just curious
I explain why in the video
Been running these amplifier for over 3 yrs no problem leave the filters open and add a dsp with like 24db roll off and this thing will put out lows stronger than a Korean and stay way cooler doing it
Yes sir I agree people are sleeping on these amps
Yes sir
Hi I have a Rockford Fosgate T2500-1bdcp from 2019. Is this a good amp? Quality of it? Someone told me they get hot and the parts inside on the board are not good?
badass amp. steve meade uses them and abuse them. he loves those amps they will easily put out more than 2500w just make sure you have good electrical; big 3, extra battery, high output alternator and use ofc wires or at least welding cable. they do get hot but thats their design and board is solid. you can run them under 1ohm with no problem
I own a Pw 10k best full bridge amplifier on the market it does wellllll over the rated power this amplifier is worth every penny other Brazilian brands are built very cheap
Hey bro how your 10k powerus going?
@@saolelejrsaolele7271 Had it 5 year's now worth every penny it's built like a tank it does rated power at 12.4 I'm charging 16v clamped over 13k out of it
@@bigkato3134 ok i just only had 1 so how you turning your 10k amp
I will probably get the powerus amp 15000 sense you know your stuff I'm going with what you recommend do you know anything about oz audio amps I have the ozv-3200.1 was wondering if it's any good its powering my two 18s at 1ohm and dont overheat I have the 9900 dd thanks for your feed back appreciate you and everything you teach your viewers
Where can I buy one in the states just tried to look one up on google eBay nothing.
Bassgod Powerus Check him out on Facebook and UA-cam 👍👍👍
What an awesome video, i don't really know much about all this. Im abiutto but all new hardware for my upgrade. Im currently running two sundown ev12s. Ive just ordered two BASSFACE SPL15.2S D2 SUBWOOFERS @ 2100w rms each, im looking at this amp or pw5000 version. Im gonna the subs in series parallel, so they'll be running 2 ohm together. Which amp would recommend for them subs.
Urgh god. Try and cancel the order on those subs or send them back. Worst subs you could have bought literally garbage. Not even half their RMS rating. If only you researched first.
@@barevids ah shit, are they really that bad? I currently have 2 sundown ev12s at 500w rms, wanted something bigger and louder but on a tight budget.
I have a powerus 13500 that was sold to me bad would love get it up and running if u can point me in the right direction or where I can send it
My number #1 question is where do you buy Powerus amplifier in United States ?
Bro what the good setting for 10k powerus amp for the subwoofer?
Hello, I watched this video so often. Would you prefer these Amp over GZCA and SounDigital? Thank you 🙏
Always ☺
Budget gem or budget bust did a power review of this amp.
I have a sundown sfv13,000d I need mosfets and things how can I get schematics on parts
These amp rarely damaged and if damaged it’s something slightly and cheap repair it will never catch fire even if the fans was blown the amp as a crazy protection u can short the speaker wire amp will just protect and turn on as you release the wire
This is the only full bridge amplifier company with a local distributer where I live so half the cars at local events run them and I haven't seen one blow.
Good morning have you worked on any hifonics brutus gamma 1000.4
Bro question what the Difference on The Taramps HD series & MD version ??
❌MD line was designed for the 12volt U.S. Market different output devices for more tank build & higher current less voltage ,opposite of HD line built more for pro audio Brazilian like concerts, think high hertz bass not low bottom / both MD & Bass lines built for US market HD was not reliable do to high current setups compared to high voltage setups in Brazil 🇧🇷 I personally run MD line because they put out a bit more power then bass line // I have the limited Premier MD8k with better Capacitors and voltage meter and chrome heat sinks// but the chrome Ltd are no longer available 😫 the _full-throttle_ blazer uses two of them on four sundown zv5 15” doing 160+db they replace his blow Soundigitals /SD looks better but there coils although looking nice ,are weaker then MD&BASS lines // and the chrome MD’s looks sick.. if you can find them , I remove that black sticker on my amps for an all chrome look like old school surf board Amps because I’m old school ,but like New tech high current amps and that chrome looks classy as F*ck‼️
Wanted your suggestion rather I shoud get a powerus 15k amp or a ruthless 10k which would be a better option
Sam, is there a way to bypass the crossovers? I do not need any of the crossovers, I would want to use my active crossovers. Is it even worth doing? I dont want the subsonic affecting my low end. I'm thinking short the hp pot?
No the pot isn't doing the crossing. If you leave it at zero it won't affect your musical freqs.
@@barevids I appreciate the answer. I almost pulled the trigger on one today, but then I came across the Mr Musicman Ear Candy 3500.1. Facekicker did an amp dyno on the 3800.1 today. After seeing the gut shot of the 3500.1 and chatting a bit with the owner, I pulled the trigger on the 3500.1. Not much info on there website, but he says he is using a new for 2021 board design with G0225 mosfets. Have you had any experience with amps using those fets? Are they reliable? I counted 84 fets/opamps on this boards, seems extremely robust for a 3500w amp. Have you seen a board like this one before? I hope you get back to me. His website is www.mrmusicmanaudio.com
Schematics how do I get them sundown sfb 13000d help
whats better Banda amplifiers or taramps? thanks
Question. I heard you say to get a bigger amp and turn it down. I have the Sundown SFB 3000D. I didn't need an amp with that much power but I got it from a friend. I run 2 10" JL w6 subs which is 1,000w RMS. My question is, would it best best for the amp to run the amp at 4 ohms or at 1 ohm and turn it down?
Or is it the same?
At 4ohm the amp will only be around 800wrms. Headroom is key for a dynamic experience. Run 1ohm amp keep it sensible.
It was in the dyno at 1,500 at 4 ohms. I was really asking for the health of the amp
Since they’re not overbuilt in the output section
The amps reliability issues aren't related to the load attached. These things are going pop just idling or on power up even with higher loads connected. Choose 1 ohm and enjoy while it lasts.
If the grounds are tied together how do you get rid of the noise
Ground loop isolator before the bass amp only
Couldn’t you use the crossover on your head unit to make it preform better ?
I can't find these amps anywhere.
Can you do a run down on an RE XTX5000.1 V1. My positive rail power supply dropped 2 FETS which traveled through the transformer melting one wire thr to the negative rail whit dropped 2 FETS as well
These amps are awesome. I'd run these if I didn't have 4 orion hcca splx 3k's
Hey barevids - what do people mean when they say Brazilian amps are voltage sensitive? I watched this entire video and you have 99.9% encouraged me to upgrade to Powerus for my next build. It's crazy how here in America all of the Korean board companies try to talk down about and steer you away from Brazilian amps! One of the main things I hear is theyre so "voltage sensitive" .... As long as I have the proper electrical to power these amps would I run into any issues?
It means they don't understand about amps 😁 output switching frequency of these and other brazilians is locked regardless of rail voltage, unlike Koreans which vary with voltage, causing possible instability.
@@barevids you're the man brother thank you for a very fast response! 👍
@@barevids run that by me one more time. I don’t understand what you mean? Brazilians are more solid because of it? Help
What is the difference between these and the silver cased ones?
The silver case was the old heat sink case that they have changed to black but I like the silver case lol
Which one you should prefer. Soundigital or powerus???
powerus by far
So they are pretty decent amplifiers? I have another question for you? Why do you hear bass playing through a Korean amplifier when every thing is turned off vs my taramps?
Nice... hey teach
We use Brasiliand style amp for mid bass and horn drivers over here
Were the hell can you buy one of these amp can't find them.
Why don't more manufacturers use the planar transformers in the power supply section?
When r you coming to Barbados?
Sam can I run lpf from amp 60 hz and deck lpf same 60 hz frequency genius 8k amp.
I really do like the circuit. And I would like to support the brand however At the current asking price, roughly $599 U.S for a 3.5k(from my research) I need to see some more modern features To purchase. For example daul inputs, higher quality pre-amp/ crossover section, panel mount rca etc. I understand they are fairly new to the market. But if they are going to charge the price of more established brands with these features. I'm going to need to see a bit more. I do feel it has a lot of Potential.
Thats a very reasonable price, have you seen the price of a 3.5k amp from the likes of DD, DC, sundown etc using outdated inefficient 20year old circuits with no active health check or thought to reparability? its like 3 times the price!
In the states to get a powerus amplifier it is the same cost or more than a (D4S) Korean built of the same power. That is also dependenon if you can even get a powerus amplifi which has proven very difficult from any reputable dealer
Can you dissect a soundigital evox2 5000.1