Great stuff Eddie. Thank you for sharing all of this with us and putting all of the effort in to make these videos, demonstrating your real-world testing. It is so nice to see everything, not just the "pretty" which the manufacturers would like for us to see. You're the man Eddie! Thanks a lot for everything! Fred
Wow, thanks for this extensive review on a IRS2092 board! I saw a lot of these cheap mono boards on Aliexpress promising astronomical wattages and I've been curious. Of course I don't have a decent 50+ Volt DC power supply and it would cost me more than these boards themselves so I've resisted. But they do seem mighty interesting for a little project...
Thanks! Yes, I think if I change out the 2 resistors for different values that I might be able to get closer to the 350 Watts - and maybe it will put out the 350 Watts. I guess I should first try running it at 200 Watts for an extended time to see how hot it gets...
Thanks a good video Eddie. I’ve seen these boards advertised for some time and wondered how they perform vs the small 500w one with the green heatsink / fan that you previously tested. Have you thought of a Schottky regulated filter board ? ,some offer better claimed efficiency.
Thanks man for the update really appreciate the video but what's the verdict can it do the power or not I was hoping to purchase that board for a sub for a project I'm working on
Thanks for the feedback! In this video with 70Vdc I could get to 200 Watts as I showed, but I'll have to do a small board change so that I can get the voltage up a bit higher to see if I can reach 350 Watts. First, I'll have to run it at 200 Watt continuously to be sure it doesn't run too hot. I'll post a video on this tomorrow - if I can;)
Just one small suggestion for all your future videos. It would be helpful and probably easier for yourself and your viewers if you could show a rough schematic or block diagram of you setup instead of trying to explain it verbally. Just my two cents.
You can make a simple alarm for your camera don't need much could fit it in a matchbox put it in front of the LED light when it starts flashing set off a buzzer Isn't it better to put some storage capacitors in front of the transfer like motor run capacitor, wouldn't that make it for the AC loss. What's the benefit of having these large size!! caps in power supplies? Is there any? You always get a like a thumbs up from me it's at least I could do lol👍👍
Thanks for the questions! Motor run caps are good for inductive loads, but not much good for amplifiers. The large bulk caps are needed because they are used to smooth out the pulsating voltage from the rectifiers, and these are being discharged by the load between cycles. So the caps need to be large to keep the voltage up. I appreciate the thumbs up;)
@@KissAnalog I'm not sure why they wouldn't be any good for amplifier?? They're not all industrial I mean domestic appliances have them. what about storage capacitors then? I would have thought that the transformer wouldn't struggle so much If it's fed from a bank of capacity at those critical moments.
In motors, the capacitance offsets the inductance. In an amp, the input looks capacitive because of the large bulk caps. The best way would be to use a regulator off the bulk caps, but practically no one does this.
Thanks for the great feedback! I think when the signal gets too close to the power rails this modulation starts to show up. At lower power levels it shows up with lower voltage rails. At that same power level with higher voltage rail it doesn't show up until the signal goes up to closer to the voltage rails again. So it would appear that the filter can handle that particular power level and that it seems more related to the voltage rails.
@@KissAnalog Ah, okay, that explains your comment about needing better high frequency power supply decoupling. I don't recall seeing so much high frequency modulation not associated with oscillation in the past, but I haven't had a need for this much output power since I sold my Ohm F speakers thirty years ago, and back then, nobody was using class d amplifiers!
Thanks for the great question! This is what I call a low frequency switcher (transformer with bulk caps). Most amplifiers do not have regulated power supplies. Did you see my latest video on this amplifier? I get close to max power. ruclips.net/video/vbyGYaWfxf0/видео.html
Thanks - I think I will run it for an extended time at 200 Watts to see how hot it gets. If the efficiency is good maybe it will or maybe it will take a fan. I'll try that and post this video tomorrow;)
The consistent quality content on your channel deserves far more than 22.2K subscribers!
Thank you! I appreciate you! Please subscribe and you will be counted;)
@@KissAnalog I've been a subscriber for quite some time, cheers.
Thank you. I wonder why I don't see the icon next to your badge showing that you are a subscriber. I'll have to look into this.
Thank you friend for all the effort you have made to make this very interesting video.
Glad you enjoyed it! Thanks for your feedback!
Great stuff Eddie. Thank you for sharing all of this with us and putting all of the effort in to make these videos, demonstrating your real-world testing. It is so nice to see everything, not just the "pretty" which the manufacturers would like for us to see. You're the man Eddie! Thanks a lot for everything! Fred
Thanks Fred! I appreciate you!
@@KissAnalog We appreciate you also Eddie. Thanks!
HI Eddie, once again you delivered a very good informative video. Thank you so much for your time and sharing. 👍
So nice of you
Wow, thanks for this extensive review on a IRS2092 board! I saw a lot of these cheap mono boards on Aliexpress promising astronomical wattages and I've been curious. Of course I don't have a decent 50+ Volt DC power supply and it would cost me more than these boards themselves so I've resisted. But they do seem mighty interesting for a little project...
Thanks! Yes, I think if I change out the 2 resistors for different values that I might be able to get closer to the 350 Watts - and maybe it will put out the 350 Watts. I guess I should first try running it at 200 Watts for an extended time to see how hot it gets...
Definitely test and see what numbers are at 4ohm and or 3 😉😀 And once again another good video.
Thank you! I'll do a follow up to see how long it can do high power.
@@KissAnalog nice lets see smoke lol
Thanks Eddie for the wonderful video.
You bet! I appreciate your feedback and for being a subscriber!
Good demonstration, thank you.
Thanks so much!!
thx for these measurements, very interesting... please use in an additional test a SMPS -thx
Thank you! I'll do this very soon!
Thanks!
Thanks so much for your generosity!!
Thanks a good video Eddie.
I’ve seen these boards advertised for some time and wondered how they perform vs the small 500w one with the green heatsink / fan that you previously tested.
Have you thought of a Schottky regulated filter board ? ,some offer better claimed efficiency.
Thanks for your feedback! I will test this again against the ICEpower.
Have you ever put together your own high end amp for yourself? You clearly have the knowledge to do it. What do you use for your home hifi system?
Thanks for asking! I do have an amp that I built many years ago - and I'll show it soon.
Thanks man for the update really appreciate the video but what's the verdict can it do the power or not I was hoping to purchase that board for a sub for a project I'm working on
Thanks for the feedback! In this video with 70Vdc I could get to 200 Watts as I showed, but I'll have to do a small board change so that I can get the voltage up a bit higher to see if I can reach 350 Watts. First, I'll have to run it at 200 Watt continuously to be sure it doesn't run too hot. I'll post a video on this tomorrow - if I can;)
Use the large transformer and caps to finish the Aleph 5 amp you started years ago.
Yes I am thinking the same thing:) I am really interested in this!
Good to see Don Henley is into his electronics 😂
LOL - thanks;)
Just one small suggestion for all your future videos. It would be helpful and probably easier for yourself and your viewers if you could show a rough schematic or block diagram of you setup instead of trying to explain it verbally. Just my two cents.
Thanks for the great suggestion!
the transistor on the heat sink is used as a temp sensor
Thanks David!!
You can make a simple alarm for your camera don't need much could fit it in a matchbox put it in front of the LED light when it starts flashing set off a buzzer
Isn't it better to put some storage capacitors in front of the transfer like motor run capacitor, wouldn't that make it for the AC loss.
What's the benefit of having these large size!! caps in power supplies? Is there any?
You always get a like a thumbs up from me it's at least I could do lol👍👍
Thanks for the questions! Motor run caps are good for inductive loads, but not much good for amplifiers. The large bulk caps are needed because they are used to smooth out the pulsating voltage from the rectifiers, and these are being discharged by the load between cycles. So the caps need to be large to keep the voltage up.
I appreciate the thumbs up;)
@@KissAnalog I'm not sure why they wouldn't be any good for amplifier?? They're not all industrial I mean domestic appliances have them. what about storage capacitors then? I would have thought that the transformer wouldn't struggle so much If it's fed from a bank of capacity at those critical moments.
In motors, the capacitance offsets the inductance. In an amp, the input looks capacitive because of the large bulk caps. The best way would be to use a regulator off the bulk caps, but practically no one does this.
Lots of high frequency modulation on your high amplitude sin waves. Seems like the output filter to remove the class-D modulation may be inadequate?
Thanks for the great feedback! I think when the signal gets too close to the power rails this modulation starts to show up. At lower power levels it shows up with lower voltage rails. At that same power level with higher voltage rail it doesn't show up until the signal goes up to closer to the voltage rails again. So it would appear that the filter can handle that particular power level and that it seems more related to the voltage rails.
@@KissAnalog Ah, okay, that explains your comment about needing better high frequency power supply decoupling. I don't recall seeing so much high frequency modulation not associated with oscillation in the past, but I haven't had a need for this much output power since I sold my Ohm F speakers thirty years ago, and back then, nobody was using class d amplifiers!
I'm also interested in what the speaker crossover does for filtering. I'll have to investigate that as well.
Hi again
I dont understand, does these boards run ok with just a transformer? Dont they need some kind of stabelized power supply
Thanks for the great question! This is what I call a low frequency switcher (transformer with bulk caps). Most amplifiers do not have regulated power supplies. Did you see my latest video on this amplifier? I get close to max power. ruclips.net/video/vbyGYaWfxf0/видео.html
What about replacing the transistors with 1KW transistors.
Thanks for the suggestion - but do you have a Part Number for me to try?
@@KissAnalogSorry I don't but google for high power transistors and you might come up trumps.
Hello again!
Welcome back!
How much is it Eddie? I want to make an amp for my record player
Great question! I forgot to mention that. It is about $66 and has a promotion available: amzn.to/3jAuThx
Run it hard until it blows up. Check its protection features
Thanks - I think I will run it for an extended time at 200 Watts to see how hot it gets. If the efficiency is good maybe it will or maybe it will take a fan. I'll try that and post this video tomorrow;)
how work to a phone only
Thanks for your feedback - but what do you mean by Phone only?