IRS2092AMP-500W Class D Amplifier: The Real Watts

This video is talking about the 500W class D amplifier you can find on Aliexpress.

[@shean-koklim4197]

My kind of DIY guy, thanks for the effort.

[@AIexanderHartdegen]

Glad you like it.

[@abelabner]

Very nice video, thank you for posting.

[@AIexanderHartdegen]

glad you like it.

[@DerBoss-hr3ts]

great video buddy!

[@AIexanderHartdegen]

glad you like it.

[@giulianosteifn]

Thanks for your video, I like the great job you have done, I like the display of KWA, I have one advice: don't wear metal bracelet watch when working like this, you might put in short some boards, by mistake :) Excellent job and I see your passion for electronics, same as me! Cheers!

[@AIexanderHartdegen]

Hello, thanks for your advice, I admit you're right, metallic watch can be very dangerous in this kind of application. Thanks for nice comment, but this video required a lot of work, and sometimes we forget the pleasure. I wish to meet more comment like this one, thanks for commenting.

[@ZAProjects]

Great experiment 👍👍

[@AIexanderHartdegen]

glad you like it. As you can see, this amp is not a fake.

[@ZAProjects]

@@AIexanderHartdegen that's I was curious about, but it easily scored >450watts 👍😍

[@xj_ussr]

If you look closely, there is a marking on the side of the terminals in the cutouts near the wires. There are many protective diodes on the board, yes, but they will save only if there are fuses or power supplies with current limiting, which I did not see with you. But I saw thin wires on the power parts, and cardboard near the heating elements. That's all you have to do to start a fire.

[@AIexanderHartdegen]

thanks for feedback.

[@user-qq5ep9zj9b]

Молодец, всё понятно хоть на американском языке. Хороший обзор

[@AIexanderHartdegen]

glad you like it.

[@edgeeffect]

Long live The Cardboard.... Tres bone!

[@AIexanderHartdegen]

I would add " cardboard AND glue gun" lol.

[@hadikayanuar1367]

Great! Last year i would buy this amp but i not have measuring instrument 😅 and now i know how many watt this amp 😅

[@AIexanderHartdegen]

glad you like it. You need a good symetrical power supply, a resistor shunting the entry and it will be ok.

[@MasterBlaster220]

@@AIexanderHartdegen What do you mean by entry? You mean the power supply line?

[@bigguy8586]

I have this exact amplifier but there is no labeling on the connectors as you stated. Do you have the schematics or a more detailed version of how to hook this thing up

[@AIexanderHartdegen]

at once not. Try to find the positive and negative terminal from the capacitors and the middle point. It will be the positive, negative, and neutral point.

[@Hudsonlee1954]

Thanks. Nice share.

[@AIexanderHartdegen]

glad you like it.

[@audiossmarioss94]

Dzień dobry. Mam pytanie. Posiadam taki sam wzmacniacz, zasilam go +/-68V 500W transformator, głośnik 8 Ohm i przy dużej mocy gdy gra muzyka wzmacniacz zaczyna przerywać, odcina go. Wie Pan dlaczego?

[@AIexanderHartdegen]

over heat. You need a better heatsink and an additionnal fan.

[@MickeyMishra]

I wonder if you can use those 500 watt Harbor Freight or Benford halogen lamps as your load Bank as they pretty much don't have a problem with heat. you may have to put a few of them in series but I think that would work out pretty well, they're already made to handle some really rough environments show some really hot and heavy test tones shouldn't really bother them all that much. the filaments are usually suspended within the course class so again I don't see any problem why this would not work and it would be fun to go ahead and watch the halogen light bulb glow. the fact they're only a dollar or less really is a great value and it should work out pretty well for a load Bank. almost with just about any Chinese board it's best upgrade the components when you can as you're really going to actually see some real world benefits. and I 100% agree the heat sinking and the fan used on this really is not ideal for max power testing but it does work pretty well for most people who just want to listen to music

[@AIexanderHartdegen]

Of course not, we can not use those kind of bulb, because simply the ohm value is depending of the heat. Unfortunately, in those kind of test, you mandatory have to use classical resistor, with the desired value. Yes you probably right, I think this heatsink is enough for people who just want listen music. I want to notice that this amplifier has a very incredible low current idle, and this is a proof of the good ingineering of it.

[@supersilve]

Good experimenting with that class D amplifier. The power meter for audio also looks interesting maybe you will put it in a better box. I was just wondering why you did not use the 20v per division on the oscilloscope, you surely could see the waveform better that way.

[@AIexanderHartdegen]

@Silvio De Leonardo thanks for commenting. This power meter is not my original conception. It's made by meettechniek.com (universal power meter V1). I have a little bit retouching some values on the program to correspond to my power range use. Yes it's made on a cardboard box... I need to make a real box. But there is the confinement, etc, founding raw materials is another story. I will see on two weeks. I need to understand something more on it, wich I always don't figure out the reason of some display on it. But anyway, it gives at some line a nice value, confirmed by the voltage displayed on the multimeter, to avoid a bad value. About the voltage division of the scope... here I have no response. I need admit forgetting my brain somewhere in my mess. Thanks for commenting, and hope you're well.

[@moacirgeekmusical7681]

​@@AIexanderHartdegenI'm very interested in this power meter too, just did some research and discovered that it's made with Arduino, is there any information about how to make it an "amp dyno meter"? Thank you for your video!

[@al25216]

hy sir, where do i find the voltage splitter?what features does it have?

[@AIexanderHartdegen]

you need to build it your self, like I did. The specs are single voltage entry= Symetrical output, the power avalaible on entry is divided by two. Ex: 6OV 10A on entry give -60+60V 5A. The module I made on the video is able to hold 2OOOW. kzbin.info/www/bejne/bpKQaoWkfKZqh68&ab_channel=AlexanderHartdegen

[@washingtonbomfim4701]

Hello, Mr Hartdegen! I have just purchased one of these chinese 500W class d amps but I am worried because, although it seems to be performing well in bench tests, its little heatsink is getting VERY hot even without any signal applied to the input (just powered on). Did this one you tested in your video present the same behaviour (getting very hot even in standby)? Thanks in advance!

[@AIexanderHartdegen]

Hello, I don't remember about this problem. What you need to do is measuring the current consumption on the negative line, and the positive line. You need to found, first, a similar current on each rail, and it need to don't exceed 200/300mA. Be sure to have a nice symmetrical rail, and be sure to not exceed 65V+/-. I think you need to try it with lower voltage value, and see if it react differently. This problem can be a parasit capacitance on the grid of the mosfet, or the main IC wich can be not ok, of something like that. I will try to reconnect mine with the symetrical voltage and I will tell you if it occurs.

[@washingtonbomfim4701]

@@AIexanderHartdegen It would be really awsome if you could verify if the heatsink of yours gets hot in standby like mine. Salute from Brazil! Best regards.

[@AIexanderHartdegen]

@@washingtonbomfim4701 the test is done (I was on my electronic bench). The currend draw is about 20mA per rail, with 60V+/-, mosfets are naked, with no heatsink, and it stays cold. Barely warm after one minute of connexion. According to the hurr on the input line, some smoke can appears from the SMD resistor near the big coil. With a speaker connected, even not warm, with a very low level sound admitted. On this amp, I have connected a 1k resistor on the line, to prevent about bad oscillation (this value can be changed according your needs). Try to connect a 1k resistor in parallel with the input low level line, and see if this problem disapear. If it dont fix the problem, it can be a defect unit. (the 1K resistor smashes some high frequency loop parasit). Also, the big coil is connected from the output to the ground via a smd resistor and coil. Maybe because a high frequency parasit loop occurs, it can provoke a consumption. First, check your consumption on power rail. Also, try to remove the big yellow capacitor, or the big smd resistor to see if the input current decrease significantly. If you notice a difference, that's high frequency loop parasit and you need a 1 k resistor on entry. If all those tips doesn't work, you will have a serious issue on this board.

[@washingtonbomfim4701]

@@AIexanderHartdegen Thanks for your hints. I'll surely give them a try and let you know the results. Take care.

[@washingtonbomfim4701]

@@AIexanderHartdegen Please allow me to bother you a little further. While I am waiting for vendor support to answer my inquiry (which is unlikely to happen), I monitored current consumption in both rails as you suggested and found 250mA! Much higher than the value you found and that may explain the heat! But since the very 1st time I started testing this class D amp I always had a 6ohm loudspeaker connected to it, so I decided to test it without the speaker and you know what?! Standby current fell to around 18mA and heat obviously disappeared. I would like you to confirm if your amplifier really doesn't get real got when a speaker is connected (even without applying tto input and look forward to hear your comments and I once again apologize for my inconvenience.

[@SheikhN-bible-syndrome]

Can you run a audio amplifier directly off of that 1800w boost converter? Or does it have to have a battery to constantly feed power to?

[@AIexanderHartdegen]

in this video they are 1300W models. But 1800W are more solid.

[@SheikhN-bible-syndrome]

@@AIexanderHartdegen whichever one it is does a battery need to be in between the amp and the converter? Because it's fluctuating power? Can the converter keep up with the random demand of power?

[@AIexanderHartdegen]

@@SheikhN-bible-syndrome you need capacitors of course. To avoid fluctuating, you need 4700µ per rail. Best are 10000. You don't need batterys between amp and converter. But take note that this amplifier requires a symetrical power supply, this is why there is a spliter here. If you don't use a spliter you can not use a amplifier like that. You need to buy a symetrical output converter, wich are quite expensive. This is the reason I use a inexpensive spliter here to use a 10 dollars converter. Also, if you want to use some very good quality amp wich cost around 60 dollars, they are high quality and requires only a single rail. I hope answered what you need.

[@ptaudio]

Nice video. Are there any plans available of your homemade powermeter? Would love to have it 😄

[@AIexanderHartdegen]

This is not my work. I just use it, change some parameters in the program, and put a 4 ohms or 8 ohms resistor for measuring the output power. lektronik.canalblog.com/archives/2017/12/02/35920694.html

[@ptaudio]

@@AIexanderHartdegen thanks for the link 😁

[@deejayobenn160]

Have you tried connecting two of those class d amplifier input to work as mono using one mono signal?

[@AIexanderHartdegen]

No I didn't. But normally it should work. But of course you need to apply a inverted signal on one of them.

[@deejayobenn160]

@@AIexanderHartdegen because direct it doesn't work

[@AIexanderHartdegen]

@@deejayobenn160 no, not directly.

[@roelbilangdal490]

What causes the 10ohms resistor suddenly burn while operating?. hopefully will be answered,,thanks for sharing this vedio sir

[@AIexanderHartdegen]

High frequency MOSDET hight speed comutation. The 10 ohms resistor make short with a coil to remove some high frequency signal on the output, to protect the speaker. But because they are sizely inderrated, they suffer.

[@jefersonfefo3006]

Amigo, muito bom vídeo. Gostaria que me tirasse uma dúvida. Eu retirei o dissipador desse mesmo amplificador IRS2092S 500w para ver o C.I, e no corpo do C.I está escrito "CSC3120 AKHoH" . Eu estranhei isso, pois o circuito integrado IRS 2092 possui a fabricante IOR e o nome IRS2092. E também estou percebendo que o Amp não está tão potente. Quando eu vou medir na saída a tensão dele em 60Hz , a tensão chega no máximo a 6 V, sendo que estou alimentando com um trafo que retificado fornece +68 0 -68, e é já vi esse o Valdemar Gomes colocar 36V na saída. Meu trafo é de um minisystem Genezi com uns 6A de corrente. Você poderia me dizer o que vem escrito no C.I do seu amplificador?

[@AIexanderHartdegen]

like mentionned in the video, it was written IRS2092 on the IC. The name of the board is the name of the IC. Like described on the video, this device is able to provide 60v on the load. It has a real power. Your benchmark is difficult to found on the net, may be you have a part replacement (or a fake one). Also, if we had more information, we can expect that you have a defect product.

[@jefersonfefo3006]

@@AIexanderHartdegen Obrigado pela resposta!!

[@produksikepala4190]

if given a voltage of -+ 80 volts, can this power amplifier still work?

[@AIexanderHartdegen]

there is a regulation process with zener diode on the board. Maybe if you make it more sturdy, you can use more voltage. Also, the converter used to feed the fan can be blown. The good and maximal voltage is about 65V+/-

[@gemulitobendanillo1725]

Sir good review i plan to buy that amplifier . Me i know also the best toroidal for these?

[@AIexanderHartdegen]

the better is simply the good voltage and good current supply. There is some models on aliexpress but they are sometimes more expensive. You can build a power supply with a simple 48V tranformer and create a symetrical output with capacitors and diodes. That's bulky but more easy to make.

[@MasterBlaster220]

@@AIexanderHartdegen i heard it handles at max. 45V Transformers, which is 65V after rectofier?

[@jj74qformerlyjailbreak3]

Sir. Good day. Are you using 60v DC? +/- 30v. ? I pulled a transformer from a Peavey amp rated for 200w for that amp. When I check the unloaded voltage of the transformer I get +/- 32v. I was wondering before I try hook it up to this amp module cause I only have the one module and kinda don't want to fry it. Lol. It's hard finding good information on this 500w amp module. And help would be much appreciated. I thank you in advance. God Bless.

[@AIexanderHartdegen]

normally you will have low risk if you give lower voltage, but some amplifier don't like it. The minimal voltage is _/+ 58V. A very low voltage can avoid the fan working. You can make a test, and using lamp bulb on each polarity. I think this amp is able to work with such low voltage. Be sure you have NEGATIVE voltage and POSITIVE volage with such value (the values you quote). Normally there 's no problem. Dont make a mistake on polarities, connect bulbs on line to prevent big damage, try and see. Best voltage is 60V. The maximal voltage is about 70. In the video I use +/- 65V. Be sure about what you do. If not, just ask. Thanks for comenting.

[@jj74qformerlyjailbreak3]

@@AIexanderHartdegen hey thanks. Your reply came right on time. I was just making loadbox with these 250w 8 ohm resistors I'm setting up in various switchable configuration. And I appreciate your suggestion about bulbs. I had thought the same but only have one at the moment. Your advice won't go unnoticed once I make a video on the subject of this amp module. Thanks alot.

[@frankrodriguez4481]

Puedes compartir me la coneccion de la entrada de audio De los tres terminales

[@AIexanderHartdegen]

I didn't understand sorry

[@martg.b.6160]

I also want to make this with the splitter, I plan to run 100W at 4 Ohms. What is the minimum +- voltage this can run at? +45 -45? Or more like +60 -60? Does this board have an isolated audio ground signal? I would think so right, otherwise it would not work with the splitter, since the middle point of the capacitor bank would short to boost converter ground.

[@AIexanderHartdegen]

yes, you're right. This splitter is made to use the amplifier with a mp3 player, wich don't need a ground reference. If you want 100WRMS on 4 ohms you need 33V +/- The splitter is a way to use this amplifier on a car. If you want to use it at home, please use a classical symmetrical transformer... If you use a spliter, anyway, the ground on the amplifier is a floating ground. The sound connexion need to be connected to the ground behind the booster (same as the battery) and the hot line need a 4,7µF capacitor to the lead entry. It may be work, or can emit some switching noise, I need to make a special test for that. Anyway, if this aspect didn't work, it's possible to use a isolated audio homemade audio transformer, and connect the wires directly to the amplifier without any care.

[@martg.b.6160]

@@AIexanderHartdegen Thanks for your answer, however I don't understand how you would connect it. A 4.7 uF cap from audio + signal to amp input? I just looked in the datasheet and I think the sound ground is isolated from the power ground, so I guess it will work fine. I want to make a battery powered speaker, not from mains power.

[@AIexanderHartdegen]

@@martg.b.6160 the RCA signal contains the ground and the hot wire. The idea is to connect the hot wire with a sure 4,7µF to the hot input, and ground to the ground battery. Normaly it would work. But I didn't tested it. The ground of the amplifier is not the same ground as your battery, because it's a simmetrical entry. There is a ground, and a negative voltage IN, this negative is not the ground. But you can define your self what is ground or not when you buld something. This is amplifier with simmetrical power supply. The O volt is the ground. All connexion will take normaly this reference, but not with the splitter, because the ground OV of the amplifier is not the ground 0V of the battery. But because capacitors are magic you can try to connect your rca ground to the battery ground and using a little capacitor to feed the amplifier entry. Anyway, you can use a transformer, it make it very more safe and easier. I need to clean my workbench and try my idea.

[@martg.b.6160]

@@AIexanderHartdegen Yes would be cool to see if a decoupling capacitor is needed or a transformer or if you can just straight up connect it the input to the hot wire. I would like to see the video if you do it

[@AIexanderHartdegen]

@@martg.b.6160 I am quite busy and tired, need to find time and energy to begin the clean up.

[@KorAllRBare]

Dude.. Err-Sir.. There are connection indicators on the board, and here's where they be at. Step 1/. Pick up the module and rotate it so that the fan is as far away from you and youre gazing at one end of the Amplifier Module. Step 2/. set your eyes towards the Blue "5 Terminal block". Step 3/. rotate the board slightly down so that you can see the PC Board Under the 5 Terminal Blocks Step 4/. inspect from left to right for a "-" once you have discovered this Minus sign for the negative 50~65 Volt terminal connect it up Step 5/. Once connected, Look to the right of that terminal to see the "G" AKA GROUND and connect that one up Step 6/. Once connected, Look further to the right and Locate "+" connect your Positive 50~65 Volt terminal up to it. From there you should locate the last two symbols and connect your Positive speaker and Negative speaker leads to them . BTW A simple 300VA 50-0-50 volt Toroidal Transformer feeding a 35 amp bridge rectifier with around 10000Uf filtering per rail, will have the amplifier or amplifiers produce a very respectable 5ooWatts Rms Mine produce 510 watts before clipping and distorting..

[@AIexanderHartdegen]

thanks for your feedback.

[@MasterBlaster220]

510? Hows that possible? How much distortion is clipping?

[@KorAllRBare]

@@MasterBlaster220 Class D amplifiers have extremely high efficiencies, So with the right votage and current the new Power Audio Amps being sold lately can output Kilowatts..😉

[@MasterBlaster220]

@@KorAllRBare Its not that, i just wonder how all this should be possible with just a 300VA Transformer?

[@KorAllRBare]

@@MasterBlaster220 I suggest you put it all together and then do the tests.. Mind you if your supply is a lowly 120 volts AC You will need to use a 600 VA transformer per amplifier module..

[@andvgeo2253]

what is the easiest way to power this amp?

[@AIexanderHartdegen]

220/2x50V ac +rectifier+capacitors

[@del20el13]

hi I speak Spanish, 4 ohms 60 volt rms? or 40 volt rms?

[@AIexanderHartdegen]

the supply is for 4 ohms impedance, 65V+/- stable for the supply. The voltage for measurements are filtered so not RMS. They are MAX voltage on the multimeter. So, 60x60=3600, :8=450Wrms.

[@mollywoodlovers]

Please link to buy the power supply

[@AIexanderHartdegen]

fr.aliexpress.com/item/32917489810.html?spm=a2g0o.detail.1000014.4.11432cecmH38rn&gps-id=pcDetailBottomMoreOtherSeller&scm=1007.14976.157518.0&scm_id=1007.14976.157518.0&scm-url=1007.14976.157518.0&pvid=cde26f4c-af38-4fba-a2ee-ece5797d97d4&_t=gps-id:pcDetailBottomMoreOtherSeller,scm-url:1007.14976.157518.0,pvid:cde26f4c-af38-4fba-a2ee-ece5797d97d4,tpp_buckets:668%230%23131923%2311_668%23808%237756%23606_668%23888%233325%2311_4976%230%23157518%230_4976%232711%237538%23561_668%232846%238111%23427_668%232717%237560%23242

[@iyungakbar4611]

What tipe mosfet this kit use?

[@AIexanderHartdegen]

can't tell you for the moment.

[@kennethbuenaflor4372]

What is number voltage capacitor?

[@AIexanderHartdegen]

it's the maximal voltage you can use the capacitor.

[@astlejohn4039]

Can it drive two 4ohm 300w rms subwoofers in series?

[@AIexanderHartdegen]

yes, you will have half power for each (125W per speaker in series). In parallel it can be dangerous, the output mosfet seems not to be cut for 2 ohms load.

[@astlejohn4039]

@@AIexanderHartdegen oh i made a mistake i was going to ask in parallel as 2ohms , thanks you cleared my doubt

[@iordanjelqzkov3337]

Why did you remove the elements and put on the capacitors

[@AIexanderHartdegen]

they was destroyed by backward power supply.

[@iordanjelqzkov3337]

@@AIexanderHartdegen The best impulse block for clas D amplifier 60 - +

[@AIexanderHartdegen]

@@iordanjelqzkov3337 +65/-65V are required. It's recommended to not exceed 70.

[@iordanjelqzkov3337]

@@AIexanderHartdegen It must be impulse to keep stable 60 volt + -

[@AIexanderHartdegen]

​@@iordanjelqzkov3337 there is many ways to keep this stable voltage. If you use classical transformers, you need to use the maximal voltage (here 70V) and adequate capacitors. With a SMPS power supply, you can use just this 65 voltage, because the regulation make it stable, as long as you didn't exceed a certain current, making the voltage drop despite the regulation. Also in this case you can add adequate capacitors to use it more better, I mean using it in dynamic mode. Of course, driving a speaker is not as hard as a resistive load. In this exemple, the signal sent to the 4 ohms load was a pure sinus, wich doesn't exist on a sound reading. So, the power never exceed this wattage on a average measure. So, because all amplifier works in dynamic, we can use half supply with capacitors, in this case 250W.

[@hasithamadhushanka8515]

Is it a good? How many watts are there?

[@AIexanderHartdegen]

your response is on the video.

[@mdzisanislam4991]

Bangladesh 👌

[@AIexanderHartdegen]

France.

[@Rtek-zv5lr]

Hello, the board is only 250W @ 4 ohms maximum. Chinese manufacturers have difficulty understanding that two 250W channels operating in bridge are needed to provide 500W of power. This board is based on the electronic schematic of IRAUDAMP7S, but resistors R13 (100R) and R15 (130k) appear in the diagram with different values, R7 (3.01k) and R8 (120k).

[@Rtek-zv5lr]

(For IRAUDAMP7S) NOTE: Potentiometer P1A and P1B have been set to zero ohms. This is configured as a 2 terminal variable resistor. This should be set to 200 ohms. This will give a nominal operational frequency of 400kHz for the amplifier module. Check the tightness of the devices on the heatsink. (Source: larrynz911)

[@AIexanderHartdegen]

This board is able to provide 450W RMS with less than 10% distorsion. At 10% distorsion, she's able to provide 500W RMS, exactly like the seller said. If you're not agree, look the FULL VIDEO before commenting.

[@MasterBlaster220]

So i need to change those? Saw that on a different video.

[@inarinukka7729]

@@Rtek-zv5lr It is not worth driving the carrier frequency of these modules over 400kHz, it is *better to keep it around 365-380kHz* . *Do not twist the carrier frequency trimmer for nothing!* It makes sense to tweak it *only if you have an oscilloscope and the possibility to measure distortions, otherwise these trimmers are set in the factory in quite right area and you shouldn't tweak them because it can cause a malfunction.*

[@arshadpc7691]

No, it can really provide 450 watt RMS with very low distortion.

[@ALESTEC10]

afinal qual foi a total real POTENCIA?

[@AIexanderHartdegen]

14 euros on aliexpress.

[@basstard13]

450W on 4ohm if I got it right with a quick look

[@ALESTEC10]

Tanks, Eu tenho um igual😉✌️

[@edifierbass7821]

yes after all those diagnostic test & measurement why not test the audio ? play some deep bass music make some noise lets test how loud it is

[@AIexanderHartdegen]

haven't adequate speakers.

[@Quest.61]

4 ohm real rms power?

[@AIexanderHartdegen]

50 horses power.

[@Quest.61]

@@AIexanderHartdegen 50 rms ? Ovv

[@irvanefprada4161]

sir what the ic U2 name

[@AIexanderHartdegen]

What?

[@irvanefprada4161]

​@@AIexanderHartdegen 8 pin ic name ???

[@AIexanderHartdegen]

@@irvanefprada4161 it's written on the title and it's a 16 pins IC not 8. It's the IRS2092

[@irvanefprada4161]

@@AIexanderHartdegen xl7005a 4 pin ??

[@ruslankorshagin]

@@irvanefprada4161 yes, xl. 8pin

[@joicejewerly5579]

Wow, 400 w 60v?😅 fire!😅

[@AIexanderHartdegen]

no. 60V pure sinus on 4 ohm load = 450W Rms.

[@tonskulus]

@@AIexanderHartdegen to get 60Vrms sinus at output, +/-85V supply voltage is needed.

[@misterbonzoid5623]

Those tiny thin wires might conduct 20W RMS max, which will be more than enough for that tiny speaker. The power numbers you mention are a joke.

[@AIexanderHartdegen]

don't subscribe.

[@amin125ccm]

​@@AIexanderHartdegen😂😂😂😂

[@clunche]

This is a good instructive video indeed. I would however point that there is no such thing as rms power as indicated in the title "500 W...rms?". Real power P is expressed in watts and results from averaging the instantaneous power p(t). We talk about average power and this formula is valid regardless of the waveforms and phase. If you power a pure resistance, then multiplying rms voltage and rms current gives the same watts as if you average the instantaneous power p(t). If you now have distortion or phase lag between waveforms, multiplying rms variables will give apparent power expressed in VAs while the averaging of p(t) will always give the watts performing the work. All the other "units" like rms or PMPO are usually pure BS in my opinion.

[@AIexanderHartdegen]

We are working here with a pure sinwave and pure resistive load. All power computation are made exactly like you calculate the power of a resistive heater. P=UxI. If you use max value, you will have max sin value. If you use RMS value, you will have RMS power. Also, the 500W are avalaible here, but with 10% distortion. In the video calculation, I chose 1% distorsion to calculate the real power (in RMS) of this amplifier. From the start of the video, no maximal power was noticed ever once.

[@clunche]

Thank you for this added comment but I will have to respectfully disagree with your statement "you will have rms power": there is no such a thing, you have watts and average power.

[@AIexanderHartdegen]

@@clunche RMS means "rooT mean square". And the RooT Mean Square of a signal on a sinwave is a average equivalent signal. The average signal is the equivalent to a continue signal wich will produce the same heat (in power) like the discontinue current. When we talk about RMS, it's because we work with complexe and discontinue current. The notion your saying is for DC current only.

[@clunche]

I see, just Google "there is no rms power" and you will see the concept. Averaging an instantaneous power p(t) to obtain active power P in watts works regardless of the waveforms and the phase (PF different than 1). If you multiply Vrms by Irms, you have VAs which is apparent power and this apparent power equals the average power in watts if the variables are measured across a resistance (PF = 1). Hey, no big deal, just a friendly remark! : )

[@AIexanderHartdegen]

​@@clunche you probably come from industry's motors and technology. Here, it's a pure sin signal injected to a resistive load, and it reduces the computation at the simplest. Into a speaker, it will be slighly different because coil is not a simple passive component.

[@lazyofboy2484]

Ghud bossq...

[@AIexanderHartdegen]

=)à-(è_