Amp test : IRS2092 chip based class D 500W amplifier.

Thanks for watching the very first video of the electronics brewery.
In this video i'll be benchmarking a IRS2092 chip based class D amplifier which is rated at 500W into 4ohms. I apologize if the video is a bit messy and my English skills aren't great. It will probably improve when i make some more video's in the near future.
The equipment i use is a 0 - 90V balanced power supply, a clamp Amp meter, 2 x 500w/8ohm dummy load,a sinewave generator at 1KHz, a oscilloscope to monitor the sinewave on the output of the amp and finally ohm's law to calculate the actual output power.
If you have any questions or positive comments,please post them below.
If you like me to test more boards in the future, please support me by buying me a cup of coffee. Thanks a lot and hope to see you soon.
buymeacoffee.c...

[@dnorby6990]

The irs2092s and the power mosfets wich are 200v 30A ones support the 2x100v supply but you have to keep in mind that you have a small buck converter (xl7005a- 80v max supply voltage )on the board for the fan and the vcc+ for the irs2092s and if you go past 2x65v the risk of blowing the converter up wich kills the irs2092s is high. I blowed up 2-3 boards becouse Of this untill i realised that the buck converter has limitations , but you can desolder the regulator and feed 12v to the 12v rail and than you can go up to 2x90vdc safely.

[@MasterBlaster220]

DUde, please make a video about that. Its great information, but if you ar enot an expert its really difficult to use these written advice.

[@edusansil]

Now I feel confident to use it in my 75+75VDC power supply that I made especially to my Class AB power Amplifier. I wanna add this little Amp to my project. Thanks a lot.

[@samohraje2433]

I tested two of these amps first amp at +-95V and the second one exactly at 101V First amp at 95V - 2h continuous runtime at full power which i measured 11A which is 484W at 4ohms handeld just fine so i extended that runtime to one full day 24h and no problems, no overheating, THD i set to around 1% and survived. But the second one fried itself within 15 minutes but i've got 520W out of it at 11.4A so you should not really exceed that 100V maximum threshold voltage. later that weekend i tested the first one at 99V and i've got 11.1 which is AAAAALMOST 500W just a few watts shy. 24h no problem at max power so at 100V it can deliver exactly 500W but this is the absolute maximum and you should leave a bit of space for voltage fluctuations because when you set the voltage or you have voltage exactly matching 99 or 100V it could spike above 101V and you fry that amp instantly if the voltage spike is happen to be above 101V.

[@TheTemporalAnomaly]

The output of an audio amp is obviously alternating current, this can be measured by an average power and peak power. Measuring the DC input will only get you close to the average power, the peak envelope power will be much more! Please measure the power using the oscilloscope, get the peak to peak voltage (just before distortion), divide by 2 for the peak voltage, square the result, then divide by the load impedance. This will give you the peak power which is so much higher you will be surprised! Using this amp and + - 70v you can easily get 600w of peak power. I have several of these amps and they work just fine as advertised. Good video and presentation, complements from Chris. UK

[@ptaudio]

Thanks Chris for your reply. I actually did measure the AC output current that's running through my dummy load. Also i used a true RMS clamp meter to do so. Wouldn't this give the same result as using the methode you suggested ?

[@TheTemporalAnomaly]

@@ptaudio No, the RMS value will always be around 1.414 x less than the peak value. The only way to measure the true peak value without (very) expensive instruments, is with a scope using the method I described. Just give it a try both ways and you will see the difference. There are many technical papers on the subject of measuring peak vs average (RMS) power. With a non-constant envelope signal such as an audio waveform, its the peak value we are interested in. It is worth noting however, that the `loudness` of an audio signal is best represented by the average power level, RMS. If you have an amp rated at 500w RMS then that same power level can be expressed as 707w peak (500 x 1.414 = 707) It`s just a jungle of terms but we do need to understand them all and how to measure them effectively. You can also measure the peak voltage on the load by using a half wave rectifier and capacitor with a high impedance voltmeter, but this method is redundant if you have a scope. Best regards, Chris.

[@ptaudio]

@@TheTemporalAnomaly Normally i'm only interested in RMS power but for the sake of the viewers i will do a retest sometime soon with peak value measurement. Thanks for the info :-)

[@TheTemporalAnomaly]

@@ptaudio I`m sorry to have opened a can of worms so to speak. If you want the RMS power, then a good approximation would be (as you have demonstrated,) equal to the dc input minus the the inefficiency. Or RMS volts squared divided by load impedance. In no way do I mean to criticize your work, it`s just that I work with radio frequency amplifiers where you are interested in peak envelope power for most calculations and specifications. My comments were just really for interest to indicate the rather large difference between the average and peak envelope power of an amplifier. It is easy on these comments to come across as aggressively criticizing a creator, this is in no way what I intended or wanted. Best regards, Chris.

[@TheTemporalAnomaly]

@@ptaudio I have just found an application sheet for the irs2029 ic that didn`t show up when I was first searching for detailed info on this device. Search for `AN-1138 pdf` There is much more info on here, very interesting.

[@R1D9M8B4]

I would love to have a series of these. I have bought a bunch of TDA7498E amps. Based on the board quality.. and the components used. I am sticking to two brands out of the 6 different companies I've purchased. I will be using it in my car.. and I will need 8 channels. I've also decided to use a DSP developer board to bring it all together via Sigma Studio. Here is my issue.. power... and I've never done anything like this. My theory is based on the little I know. Lol The TDA7498E are boards that work up to 36v .. they are rated 160w per channel or 220w Bridged. You are 1000% correct... although I can find the boards at a decent price... the power supplies are ridiculous! To get 500w from 36v is like looking for a unicorn. Specially when you are boosting from 12v. This journey showed me why standard car amps are so expensive. The reason for me doing this is for control and to hide all the components. Then there is the bit about cooling, and another bit about power... then you have all the other issues like.. signal gain.. and all these other issues that come up when putting a sound system together. 🙄 Lol what I am say is... please do all the things I need to do before I so it so I can do it right the first time! Lol

[@dnorby6990]

All of the car audio amps are boosting up the 12v dc to a minimum of 2x25v and up to 2x90v i've seen also 2x100v dc and from there they do their job

[@AIexanderHartdegen]

using clamp meter to measure current on the speaker is not a good idea. I think you might make a voltage pic measurement, or alternative measurement on a 50HZ or 60hz frequency on the dummy load. Also, you seems to run the test with 1khz tone, wich is not perfect for a clamp meter measurement. A power measurement is made by reading RMS or max voltage on a dummy load.

[@inarinukka7729]

Good informative clip...but some question what has been asked here and what is worth paying attention to. First and perhaps most important. Maybe this question - why the seller recommends a supply voltage of + -70V? They use a wide variety of components. Those who have received this module with Infineon MosFETs could be VERY, VERY happy because 90% of these modules is made much poorer and older MosFets suitable for DC-DC converters and these are very cheap but final price (for module) is same. There is also other question - is these Infineon IPP is genuine? For example - I got same module ~15€ for IRFB41xx MosFETs (only 150V and low current capacity too). But I bought new and better SUP MosFETs. And there is also other thing, XL7005 Buck converter (U2 ic) which allow to 80V operation voltage, therefore, it is also recommended to use not more than 70V. In addition to everything +-70V is more than enought to get 500W in REAL MUSIC power (not to be confused with a pure sine signal). This test at +-90V is very good, seems like this other weak parts withstands this voltages (quess, how long?) and 400W with pure sine...how many W is equal music power? I suggest that at this supply voltage far above 1k (if we talk REAL MUSIC power watts). Here is some Behringer INuke amps (they are 2 IRS20957 [almost same as IRS2092] bridged circuit i.e. 2chip+4 IRFB4227 FETs per channel and +-85V supply and output ~800 W measured). This IRS2092 module is not best construction and there may be some faults which the buyer should check, for example R13 (in many cases there is too low value R13 and need to replaced to 3.01k), 10R 2010 is also better to replace to bigger 2512 but this 2010 works too if you dont short it. Output inductor is also a compromise, little bit small, 137-2 is better to use or for example some Sagami or Coiltronics inductors.

[@inarinukka7729]

sorry* "Coilcraft" I want to mention

[@TheTemporalAnomaly]

You have raised some very good points. I have made a comment about the average vs music power question. Dated 11th Aug 2021 if you want to have a look. I call it average vs peak envelope power. You asked how do you estimate music power from average power, well its a bit of an approximation, but you could say music power = average power x 1.414. It will get you in the ballpark. + and - 70v will easily get you 600 watts (peak or music power) into 4 ohms with this amp!

[@motosk8er2]

@@TheTemporalAnomaly Not sure where you came up with that 1.4 number. That has nothing to do with anything. Maybe your thinking of the difference between AC RMS voltage and peak to peak voltage. To get peak to peak voltage from an RMS voltage you multiply by 1.4xxx. That doesnt have anything to do with the output power of this amp. Output power is measured in watts RMS, that is the standard that's used. "Musical" power which is called dynamic power is dependent on the power supply. The amount of bulk storage electrolytic capacitance is primarily what determines how much dynamic power an amplifier has. And it's a pretty useless number as you will only get that power for a very short period of time (like 1-2 seconds).

[@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)

[@alexanderbelov6892]

This power supply is (GND, +90V). While the amp board takes (-60V, GND, +60V) DC (120V overall) for full power.

[@apc2729]

This can provide 500 watt with dual 90 volt, I use dual 90 volt 10 amp power to get continouse 500 watt

[@alesfritscher1494]

Definitely Yes, in my measurring is reality 250W too, but distortion is high, it mean undulation around carrier frequency, if the drain on the resistor, god know how it is in speaker in variable frequency

[@bmamps3937]

The Fluke 335A is only accurate at 50 to 60Hz. The errors are likely to be significant at 1KHz. Looking at it another way, if the power supply is +/- 65V then you should be able to get an output swing of about 120Vpp, or 60V peak. 60V peak into 4 ohms is 60^2/4/2 = 450 watts average, not peak. The numbers are not adding up. Running at higher voltage will dramatically increase the power dissipation in the transistors and output filter inductor, possibly leading to overheating and failure.

[@ptaudio]

Thanks for your comment. I will probably make a "part 2 video" on this amp in the near future. This will contain various measuring types based on all the comments i got on this video :-)

[@MichaelBeeny]

The sine wave looked to be an odd shape, not what I would expect to see.

[@mihaichiriac2959]

hy i have a power suply of 2x50 vdc ... will it work ?

[@ptaudio]

I think it will but with less output power

[@digitalspaceman]

Nice video , thanks sir , how can be possible to regulate the output volume of this amp ? It always works at maximum power , I would like to be able to use it at half volume for example or at a quarter of volume

[@ptaudio]

add a potentiometer on the input .www.muffwiggler.com/forum/userpix2/15951_screen_shot_20161117_at_73357_pm_1.jpg

[@digitalspaceman]

@@ptaudio thanks sir , I have got a preamp on the input side , I was thinking to put a 10Kohm potentiometer on the positive of the amp output side that goes to the speaker , just to protect the speaker , I also gave to the amp +- 80V , it fumed a bit and a little component that was close to the voltage taps jumped off the amp board ( to be exact , it was the component behind the + and GND , It's called resistance SMD100 , I read that another buyer had the same happening on his board by giving it +-50V ) , but the amp works anyways and it is loud on the speaker , no distortion using my Android Tablet as audio source , I ordered two more new amps from aliexpress today just in case ..

[@digitalspaceman]

@@ptaudio Sir do you think that I can drop the voltage from +-80V to +- 70V by using PATIKIL 100W 1 Ohm Aluminum Shell Wirewound Resistor, 2 Pack , one connected to the plus and one connected to the minus of the +- 80V transformer ? Theoretically should drop around 10V on each polarity . Still I don't understand why that component blown off .. you demonstrated on your video that the Amp can handle even +- 88V .. Perhaps my amp is not as good as yours ? The new amps which I ordered today are recommended to be good ones , I ordered them from the same supplier on aliexpress which sells dual voltages transformers including the one I have bought and used today . There are also of +- 65V , +-70V and +-75V .

[@Ne3M1]

Thanks for the video. Absolutely CRAZY to think you can buy an Audio amplifier for 11EUR that can do 2310W or even 400W. Mind blowing stuff.

[@thysellis3677]

Brilliant video, sound and video quality great, keep this up and do more interesting videos. i like your PSU

[@Centar1964]

This is interesting as one could run 120 vac through a full wave bridge rectifier and into 2 large 100 volt caps in series to create +_80 volts dc, If you ran the audio input through an isolation transformer and put it all in a grounded case and float the ground from the power supply it should be safe, assuming your speakers are insulated.

[@ДмитрийОрлов-ю8ч]

Your measurements are not very accurate. It is not clear exactly when the sinusoid is limited. Very rough current measurement. The topology of the circuit allows you to get 600 watts RMS even with an unstabilized power supply.

[@martyhewes8589]

Don't feel bad about your English, I found it much more understandable than the English commonly spoken in Lexington Kentucky :). I bought two of these, now I'm looking for a power supply to power them.

[@paulipoika]

Make sure a little heat sink is not missing on your amp located over microchip to main heat sink ... I ordered 3 ... one is missing heat sink for chip

[@TheKb117]

can you check the frequency response? just curious how flat it is through the spectrum... 0 - 100KHz, perhaps... thanks

[@misterbonzoid5623]

You can't hear above 20kHz max.

[@MrSanthisagar]

very good demo brother...

[@andrewandrosow4797]

Добрый день! Паял усилители класса Д на данной микросхеме - к сожалению на3-4 раз наступал пробой драйвера и он выходил из строя. В итоге сделал на микросхеме типа "все в одном"IR4322 - работает по сей день.

[@justinkv02]

Super Bass Amplifier Using PAM8403 Board With MP3 Bluetooth----MORE DETAIL SEE THIS

[@jairovillarreal6827]

Hello. Video excelente. Thanks for You time

[@jkvintageanalog8489]

looks like they dont got right filtering on these. Looks like a lot of switching nosie on those things. It didnt look like it was truly clipping on the scope just fuzz and crappy output. At the higher power levels anyway. Sure they scimped on the components especially those inductors no way those would filter 500w. Maybe thats why they want them run at reduced power level

[@ptaudio]

Yes,the output filters are crap. The coils already run at 50 degrees centigrade when amp is idle. At max output they run really hot. I guess they are way too small for this amount of power.

[@mikebags6653]

not bad, it is cheap and small. perfect for small factor project

[@arvisl5810]

Hi, try (Vmax × 0.0707) to convert to RMS Vmax=p-p of the oscilloscope and then V^2÷R ! as far as my teacher said I^2×R is mainly used for calculating power loses...

[@biswajeetsingh4994]

Your teacher is absolutely correct.

[@josealcalalara3658]

Como puedo conectar dos de estos modulos en puente para que me de mas potencia?

[@MrWiharsa]

Awosome you give proof ...nice very usefull information

[@brankozivkovic6555]

Besides power, what is sound quality of this amplifier? Can it be considered as HiFi amplifier?

[@ptaudio]

Defintely not hifi

[@railtonsilva2009]

Muito bem explicado o vídeo.

[@tarekakash3659]

Sir,does is run in 80-0-80 voltage without any modifications? And Working?

[@ptaudio]

Yes

[@darkangel2435]

thank you for the info, more video to upload

[@brankozivkovic6555]

I have amplifier with dual STK4048 which is burned on one channel. I can not obtain original STK to repair it. Power supply is (+/-)65V. Linear not SMPS.. Du you suggest to use this module to repair my amplifier? (Change one channel with this module? Or both channels?)

[@ptaudio]

i see alixpress sell's the stk4048 for under $10. I would try that first. Most likely not a genuine chip but for that money i would be willing to take a chance.

[@brankozivkovic6555]

@@ptaudio I already tried with locally obtained STK . Twice they last several minutes and burn out. So I am considering radical change of topology. Just want to keep power. What is the quality of IRS amplifier?

[@DanielA-pl5qs]

Thank you for the video! Does anyone know the specification and value of a power supply for this board?

[@barneycarparts]

What power supply do you recommend for 100watts RMS? And, whats it sound like? Some of these "D:" class amps have all the high fidelity of an Ice Machine at a Motel 6.

[@ptaudio]

i did not try this but i think +/-50V would be sufficiant

[@barneycarparts]

@@ptaudio Thank you Thats good to know. BTW: how much current did the amp draw at +/-65VDC ? I want to make a Bass guitar amp.

[@justinkv02]

BRO SUPER,,,

[@lsohweldfab6575]

Na, noting fantastic at all😂

[@tonyroe5405]

Considering the transients generated by all class D power amps, it IS risky to go above +/-70Vdc; the on-board XL7005A switchmode regulator (for the processing part of the IRS2092 and/or the fan?) has an absolute max of 80Vdc, and so do the main filter caps on the sample used (mine have 100V caps). Failure rates rise quickly even below these ratings. In this comparison, using a sine wave that looks more like a rounded bent triangle, taking the "max" power substantially below where clipping is apparent, using a nominal 4 Ohm load but not measuring it accurately, not allowing for measurement accuracy at the test frequency, having long thin power supply wiring, having no extra caps at the PCB (etc), the measurement values are not very meaningful; BUT it is still a very useful (and appreciated) post, indicating that at least some samples don't blow up above their maximum ratings. Does anyone have a schematic including the protection circuit, XL7005A and fan?

[@victorburuiana3201]

No! It`s not a maximum, it`s nominal power. Maximal power it`s 500 (in complet limitation of signal)

[@mytarevserg]

onderful video!I thought what if I gave him 2x90 volts?I have a powerful toroidal transformer !!! there is a constant current of 2x90 turns out.I 'll power it up . thanks for the video!!!

[@neilson6017]

Eu adorei o teste! 😀😀 Mas eu tenho uma pergunta. Porque você mede a potência se baseando somente na corrente? Poderia estar passando um tensão de 1000v na saída do amplificador e, apesar de ter baixa corrente, teria um alta potência. Eu acho que medir só a corrente não diz muito coisa. Isso aí é um amplificador, não uma máquina de solda 😂😅. Desculpe se falei alguma besteira. Gostei muito do teste!🤗

[@diogotjsrecife]

Bora lá kk Falou besteira, mas não é problema. Potência é P=I (corrente) x V (tensão). E famosa formula da Lei de Ohm é, V(tensão)= R(resistência) x I (corrente). Substituindo na formula da potência anteriormente dita temos: P= I² x R. Podemos ainda ter "mais" uma fórmula da potência onde ao isolar a corrente, temos: P= V²/R. Pronto, o que isto quer dizer?! Que todo caminho dará no mesmo lugar. Ele podia medir a tensão e dividir pela resistência, sem problemas. Como ele poderia pegar a corrente e multiplicar pela tensão, na qual é amelhor forma, pois a resistência pode variar(nesse caso usando resistores, não varia consideravelmente como um alto falante). Ou seja, a potência é um produto da Tensão e Corrente.

[@garotoney]

Muito obrigado pela explicação!

[@fredfabris7187]

Did the inductor and the heat sink get hot? How long did you run it?Thanks

[@ptaudio]

It gets a little warm. Not really hot. It ran about 10 minutes and still wasn’t really hot due to the fan.

[@lucasc.5700]

amazing video

[@tpol6515]

Rms power are not mean to calculate power for frequency other than 60Hz

[@napatencie4421]

How it sounds? What is THD by 400 Watts of power?

[@rexbernarddaya105]

Hi please try TDA8954TH. Class D Amp...please...

[@barneycarparts]

I finally got that $15 500watt Chinese Amp operational last night. Dang!!! Its loud. The way I have it hooked up is 58VDC so it will prolly be just over 100Watts RMS. Mebby 113W. But the power supply runs Hot. roughly bout the same heat as 2 100 watt light bulbs so I need a fan on the power resistors. Calculated power draw from the plug is 1.17 Amps. Its a Power Amp chip made by Infinion. I think its an American company. So far I'm impressed. I can plug a guitar right into the input no preamp needed. But it needs a volume control. My ears are still ringing. The PS is just a full wave bridge rectifier plugged into 117VAC wall plug, then DC is divided by 2 100watt 50 ohm resistors screwed down to a large heat sink, and filtered by 2 1000uf 100v caps. 100 watts is all Im after so I may add another 10 or 20 ohms to the resistor divider for less heat.

[@ptaudio]

that powersupply sounds dangerous my friend. please by carefull !

[@eduardbering4662]

Nice bro

[@Gumble1]

Ím wondering about the efficiency of this tiny board… i think they have around 90% is that right? So about 8.5 Amps of consumption? Would be nice to know because i also have one of these but not the equipment to test it out…

[@ElshanAkhundov]

Want to change MOSFETs to IRFP4227, i found a similar board with this transistors where they show 1kW power can you please comment if it is possible

[@ptaudio]

Only changing the mosfets will not be enough. The irfp4227 can handle 200v and this is needed to achieve the desired 1000w. This board can't handle 200v. You will need to alter so many components that is not worthwile to try it. So my answer is no. You will be better of buying the 1000w board.

[@PedroSanchez-pr2oh]

Hola colega consulta si lo alimento a 88+88v el disipador calienta demasiado?

[@w1ndex]

I never trust the ratings on most Chinese made amps, just shoot for about a half to a quarter of what it says, but for the price, hell back in the late 90's I paid almost $200 for a Rockford Fosgate Punch 250a2 that put out similar numbers and was the size of Buick. Get a cheap computer server power supply and rock on.

[@N-Lee]

I bought one of these IRS2092s recently from Ebay, in part because you can never trust the output ratings. They lie so much. I only want 100 watts/ 8 ohms, mono peak for a subwoofer at 50 volts and I figure this amp might get me there.

[@josepeixoto3384]

how does the music sound on it? no want listen test tones

[@diogotjsrecife]

I was also wondering why the seller says not to use over 70 volts, since the components support it. This video helped me a lot! I can now use my 55.5 + 55.5 AC transformer. Thank you!

[@Паша-о9к8ц]

in my such amplifier, capacitors are installed at 63 volts, if there is a desire to increase the power of the amplifier, use a condesator + 30% of the voltage. If the power supply is 90 volts ( + / - ) , then the nominal value of the capacitor is 120 volts .

[@barneycarparts]

sounds like you are using a fullwave bridge rectifier and a voltage divider Very cool . Me too I'm going to try 2x50ohm 100 watt power resistors first That should be 98 watts.

[@legalprime2645]

Hello. I purchased 2 such boards and a +-80v power supply. I did not notice the seller's warning about the maximum power supply of 70V. In your video, the amplifier runs at 90v for a short time. Have you tried using it for a long time in this mode? I'm afraid to burn down the speakers

[@ptaudio]

With 80v you should. Be fine

[@fajarefendi2444]

did you just replace the mosfet? without replacing other components? so that it can be supplied more than 70 volts??

[@ptaudio]

No i didn’t change anything

[@bizek93]

Is there a symmetrical power supply right? -70v/GND/+70V?

[@ptaudio]

Yes

[@trishavillestar6371]

So can i run it upto 95vdc? And its it safe?

[@ptaudio]

I did not test at 95v so this is at your own risk

[@trishavillestar6371]

@@ptaudio thank you

[@trishavillestar6371]

@@ptaudio can i ask again my first question is wrong im sorry hehe. My supply is 82volts dc only it is safe?

[@ptaudio]

@@trishavillestar6371 then you should be fine

[@trishavillestar6371]

@@ptaudio thank you so much! I will subscribe to ur channel

[@igsj3596]

hello GOOD MORNING WHAT MAXIMUM VOLTAGE THAT CAN BE USED IN THIS AMPLIFIER. NO RISK OF BURNING. REGISTERED FROM BRAZIL.

[@masterdryxvlogs]

how many amps is the power supply?

[@brianjaderickdeguzman1638]

Master dryx isa din ako sa mga nanonood ng vid mo kasama si boss OX, pwd mag review ka ng ganyan amp? Kase ung akin triny ko 80-0-80DC malakas masyado talo nya pa ata ang AV-737 sakura request kolang po sana

[@trishavillestar6371]

Sir dryx may ari kunadi idol kag na try ko 45-0-45ac kusog pa sa 737

[@pcenthusiastbd894]

Hey . Could u plz tell me, can i use ac 50v-0v-50v step down transformer with it? Plz i need to know

[@ptaudio]

yes,but ofcourse you will also need a rectifier and some buffer capacitors to go with it.

[@frustratedgamer5131]

If I use +-60V, can use I use 2Ohm load? The MOSFET you looked up said it could handle 60Amps. If the problem would be the inductor, I have a replacement rated for higher currents out of another class d amp (most probably 33uH)(Tas5630s board)

[@ptaudio]

i did not test with 2 ohm load so i don't know

[@lazyofboy2484]

Hadeeerrr booosssq....

[@apc2729]

With 10 % THD, you will get 500 watt. You are measuring with very low distortion

[@ptaudio]

This comment has been made before and just like then my answer is that i want a measurement at near zero distortion.

[@apc2729]

@@ptaudio then the tiny board is real winner !

[@josepeixoto3715]

how does it sound...

[@junmhelvlogger6273]

Supporting here mr

[@alexanderbelov6892]

Probably power supply is unipolar (GND,+90V), while the board takes (-60V, GND, +60V) DC via three wires for full power.

[@ptaudio]

nope supply is +90 0 -90

[@yakthongsiri619]

ok

[@sjm88channel27]

Up nice vedeo

[@xzVice]

hey, could you please try testing an 8ohm load? im curious about the results 🤔

[@ptaudio]

With 8 ohm load the output power is half so about 200W.

[@xzVice]

@@ptaudio so i suppose that with +-48v it would be even lower

[@ptaudio]

@@xzVice way lower

[@meloniuskrebs]

How much can i expect at 8 Ohms, 100V? Or 8 Ohms 70V?

[@thetechdoggy]

8Ohms 65v 0.1%THD = 280W

[@produksikepala4190]

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

[@ptaudio]

Yes

[@emiljimeneznunez101]

Saludos desde República Dominicana, me he comprado uno de esos y el inductor a la salida se calienta mucho inclusive sin carga conectada, que me recomiendas.

[@franciscojavierrequenaapar3941]

Hola yo lo soluciono girando el refrigerador un cuarto de vuelta y canalizo el flujo de aire atraves de los 2 condensadores y llegando al inductor y lo refrigera,claro esta se debe hacer un nuevo agujero calculado al tefrigerador pero mejora mucho

[@thetechdoggy]

380W @ 4Ohms 65v DC 0.1% THD, 500w @ 4Ohms 65v DC 10% THD

[@heizer2]

just be sure not to overload the electrolytic caps at over 68V. At 2 ohm this thing should bring your 15Amps at rated voltage for 500 watt :)

[@ivomixdj]

If I replace those caps with some that can handle like 150v can I go with +-100v?

[@heizer2]

@@ivomixdj The chip han handle 100V, if rest is able also it should work

[@heizer2]

But take a look in the datasheet, some parts are change to work better at higer voltage. Also its possible that this board starts to ring/oszillate. Be sure not to kill some expensive speaker :)

[@lorenzozani]

Nice test, Thanks for sharing! I am considering this amplifier board to run a custom-made piezo transducer. Would it be possible to run a test at 24V (or 36V) at 25kHz to check its power output and distortion? any comment? Thanks.

[@ptaudio]

Board does not run well at this voltage. Very low output.

[@zardoz53]

this board requires minimum ± 56VDC to switch properly

[@mytarevserg]

ещё раз спасибо!!!

[@ivomixdj]

I have a transformer with dual 70v output, rectified it will go +-100, I've just bought 2 of these board, I will test those this weekend, do you think they'll work with +-100v?

[@ptaudio]

100v is probably without a load. Normally 70v ac rectified results in 90v (70 x root of 2) dc so you should be fine

[@ptaudio]

Correction. 70v ac retified is actually 98v dc. I did not test at this voltage so this is at your own risk

[@ivomixdj]

Tomorrow I will try, I'll just put some higher voltage capacitors and try. But first of all I'll measure r13, in the forum they say that that resistance must be replaced with a 3k one

[@ptaudio]

@@ivomixdj can you post a link to this forum topic ?

[@ivomixdj]

Tried with +-100 v with one module , only for a minute, it stayed on normally, with a speaker connected I can hear a lot of interference but when I put some input ...wow a lot of volume ! In only one minute the board become a little warm in the area of the IRS Tomorrow I'll try it better

[@brianjaderickdeguzman1638]

Can i use 80-0-80 Ac power supply?

[@ptaudio]

no,only a dc powersupply can be used

[@brianjaderickdeguzman1638]

@@ptaudio what if i use 65-0-65 ac transformer and converted to dc with an output of 80+?

[@ptaudio]

@@brianjaderickdeguzman1638 that should work

[@arpadnagy5872]

500w 10%thd 4 ohm

[@ptaudio]

10% thd is not acceptable for me. I test only outpower with undistorded sinewave

[@bigguy1178]

I was watching another dude who did the same test except his meter was showing actual watts. He actual got 500 w at 60v. According to his oscilloscope there was distortion at 60v. I would watch his video and tell me why you both got way different results

[@ptaudio]

Can you post a link to this other video ?

[@bigguy1178]

@@ptaudio kzbin.info/www/bejne/oH3OiImrjqqGqdU

[@ptaudio]

@@bigguy1178 that's my video....

[@bigguy1178]

@@ptaudio kzbin.info/www/bejne/oH3OiImrjqqGqdU

[@bigguy1178]

Oops sorry. Here's the right video. kzbin.info/www/bejne/oH3OiImrjqqGqdU

[@НикНик-д1г]

Спасибо

[@Vanny137]

Hi does this use ac voltage or dc?

[@ptaudio]

Dc

[@СтепанНеважно-ь6в]

Какое напряжение подавали на вход усилителя?

[@Cnopir]

Там же видно 65

[@ФедорМорозов-з4п]

Из описания: Это чистый усилитель мощности, чувствительность входного сигнала 1,5 V rms..

[@irvanefprada4161]

IC XL7005 STEP DOWN 12 max input 70VOLT

[@ptaudio]

you have a valid point. i checked the specifications of this regulator. The maximum input voltage is 80V. It's directly connected to the powersupply on the amp board. So in this case the maximum voltage allowed on this amp is 80V. Thanks for the comment.

[@inarinukka7729]

@@ptaudio even this 80V is too much but this is pretty good that this chip survives even this 90V i wouldn't have dared to try it but now i know it can withstand more :D. Well, in fact, you can remove this chip from there and change things, then this module can withstand 100V as well but there is then better solution to deal with IRS2092

[@viktorvarga33]

@@ptaudio I don't have the schematic, but it should be a SOIC8, maybe U2. Putting a Zener in series with VIN pin (Pin1) could simply reduce the incoming voltage to the XL7005. Since there is almost no current power rating is not critical. What do you think? The electrolites are rated 100V if I'm right, so this way we can easily and safely extend the limits.