Except the calendar app on your phone. Literally anything is better than a paper calendar. Don't be crazy. Innovation is a good thing. I'll take automated notifications set to the exact minute I need them than a piece of paper that'll just end up making more trash.
Serendipitous timing on the magnapans being used as an example, I have a friend who was using a schiit audio Ragnarok 1 to drive magnapans and it went into fault mode and will not recover. He just sent it in for evaluation and repair.
Indeed you can feed a PDM signal into a class D amplifier and therfore stay fully digital, i.e. like this IC does: datasheets.maximintegrated.com/en/ds/MAX98358.pdf
Either way, you make the waveform from the high/low digital level low-pass filtered to make it into analog. Most class D amplifiers are however operating with analog input that then gets translated to the PWM to drive the switching of the amplifier transistors and with analog feedback.
You sir are an absolute Gem. You've just answered my questions about Class D. I have saved some pennies and I'm current looking at buying a mini 2ch class d hifi amplifier to suit Q Acoustics 3020i Bookshelf Speakers. I'm in the UK. Any further advice or links to your products would be really helpful. Excuse my ignorance. Loved watching your channel during the lockdown. Respect your thoughts.
Audio Science Review has a great collection of tested products that can help you determine if what you're looking for is actual decent quality. Don't pay attention to subjective reviews.
Please...I need help with a question. I'm building my home theater...I'm in love with the sound from Arcam AVR21 (yes the new model)...it's rated at 90wpc. If I bought (as example) any external 7ch amp that has (let's say) 200wpc and then hooked it up (now the question) Would I be getting the sound signature from the AVR, or the external amp. I don't care for denon or yamaha with my klipsch heresy IV, relative to Arcam. Arcam just simply sounds better to my ears. I have a great yamaha rxa3080 (until i heard my RF7iii/64iii on arcam)...but prefer the sound of Arcam. So when it comes to my second room, is it as simple as getting an Arcam Amp to gain their sound? Hope that makes sense...and any advice on where sound signatures come from when adding separates is appreciated. Take care, Tommy.
It's both. You get the sound of both and depending on what you set the volume of each source to, you'll get a matching output. Be careful not to blow up the inputs on your preamp. You want to ensure that the source is outputting what will sound best and does so without clipping. Use an oscilloscope or, if you know what to listen for, use your ears.
@@maxb.simonsen2459 Like for example a totally new type of transistor made of different materials capable of higher switching speeds and less current draw etc.
@@Bassotronics Sorry, that's not how it works :) A class AB is inefficient by design, not by choice of components if that makes sense. The class AB design is not a switching amp.
I'm curious to know what "tweak" there is to my Rogue Audio Sphinx V3 hybrid amp. It's a combination of tubes and Class D. I'm not the real scientific type. It just sounds great!
The tubes on those are strictly for looks. It's 100% a class D amp. Not sure what "tweak" you're speaking of. If it sounds great to you, that's all that matters.
@@orangejjay I can't imagine why you'd say that those tubes are "strictly for looks"? Clearly, they're part of what makes the amp a hybrid. czcams.com/video/guzgjKrc6IA/video.html
Ok I got it but a HMI inspector would fail this lesson, sorry Paul. He would say preparation , preparation & more preparation so it just runs silky smooth without digression. Keep the videos coming though because we love them.
Now we know how long in advance Paul makes the videos. 2nd of May on the calendar and today is the 28th of June. Paul could be on holiday for 8 weeks without us noticing. Just like the sun. If it stops we would not know for 8 minutes. Just saying :)
A class D amplifier switches between and the plus and minus voltage rail, no resistance involved. If you regulate between the plus voltage rail and ground (for positive voltages) and between ground and minus voltage rail (for negative voltages) there is always resistance involved. Only at the moment of clipping there is full efficiency.
@@googoo-gjoob Well I don't believe you can hear differences in amps. ATI has an unusual long warranty for an amp or any hifi product for that matter. Are you familiar with Cherry amps from The digital audio company?
@@jasonkillsformomy What excessive heat? My amps run cooler than many class D amps and the fans haven't turned on once in 20 years, some class D run their fans 24/7. New doesn't equate to better. Look at all the crappy sub amp failures out there, almost all class D. Manufacturers love cheap shit more than they love durable shit, that's why you see some jump at class D while others don't touch them at all. Call me when a class D has outperformed a class A/B and has done so for 20 years. Oh, and many still sound like shit as well let alone don't give you 200 watts/channel which is the only reason why I'd consider one. And seriously, how much do you think it costs to power an amp? Anything else?
@@Roof_Pizza If a D runs it's fans all the time then that's the way the manufacturer intended them to be run and be on the safe side. What amp does this? The D amps I have seen don't even have fans because they don't need them. I'm talking about speaker hifi amps and not plate or pro amps. Newer said new equate better. There is no proof that D fails more often than AB. Pro amps have been using D forever. Everything nowadays is planned obsolescence anyway. Sure sub amps fail, but that's usually some really cheap stuff. Never heard of Pascal, ICEpower, Hypex, Purifi, Speakerpower or Cherry failing. And by that I mean I mean out of the occasional fluke. There is not a single product made in history that has not failed. Even Toyota and Honda brakes down sometimes. And that's 99% of the time do to user neglect. "Sounds like shit" Well some people imagine they can hear differences in cables, DACs, CD players, lunar phases and whatever. Not a single person have done this in a scientific controlled double blind test. Ever. And I Don't know what amps you have been looking at, but 200W is nothing for todays D amps. You can buy D with thousands of watts per channel. I'm not saying there's anything wrong with AB. D is just more efficient. Some people and not just audiphooles don't want to make changes. Some people own all their life the same brand of car as the first one they got or the same brand as their parents used.
@@jasonkillsformomy LOLZ. Looks like you and Schitt are on the same page. 'Vidar is nothing less than a no-excuses, exotic-topology, Class-AB, linear-supply, microprocessor-controlled, power-doubling, dual-mono-ish, intelligently-managed, drives-almost-anything power amp. No Class D, no switching supplies, no fans, no compromises, nothing in the signal path but music-for a three-figure price tag.' Tell me again how much it costs to run an amp!!! I think I'm at ~ 175,000 almost continuous hours.
So, a class D amplifier is twice as efficient as a class AB amplifier and four times as efficient as class A amplifier. Wow! O, wait a minute, that's only a 3 dB and a 6 dB difference. And when I give the class AB a 3 dB more efficient speaker and the class A a 6 dB more efficient, than all three have the same efficiency! And, now the funny part. Same efficiency, means an equal amount of waste energy in heat. For the class A we have a nice heavy heat sink, and for the class D amplifier with the 6 dB less efficient speakers we have a closed enclosure for at least mid and tweeter, even with some insulation (wood and damping material), for the woofer we have hopefully a "vented" enclosure with not so much insulation... And, on top of that, the last one heats up more and gives earlier and more power compression (till 6 or 6.74 dB at maximum rated power). So, some of the efficiency gain gets lost. So, if you want more efficiency, choose more efficient speakers! And get rid of the passive crossovers, with a 2-way you gain an extra 3 dB, with a 3-way 4.8 dB and with a 4-way an extra 6 dB, plus some extra efficiency for the lack of insertion loss.
Even in this digital age, nothing works better than a monthly paper calendar!
Except the calendar app on your phone. Literally anything is better than a paper calendar. Don't be crazy. Innovation is a good thing.
I'll take automated notifications set to the exact minute I need them than a piece of paper that'll just end up making more trash.
@@orangejjay Frankly even the phone app is a mere replication of the paper calendar
best explanation I've come across on CZcams so far, thank you!!
Was listening your audio book before heading here for the latest video. Love your videos!
Plugged this video into my 3D printer and am on my way to making zillions...thx Paul!
Your class A explanation gets a C Minus.🙂
Right! If he can't explain the simple way, he doesn't understand it himself
i understood easily, so you as a student get an F
You're a gentle and a scholar. Tx🎓
Oh no! Paul's at a white board...! LOL!
love you, paul. but i had to stop the vid a few min in. trying to wing a 5 min explanation of why class d is so efficient needs prep.
Serendipitous timing on the magnapans being used as an example, I have a friend who was using a schiit audio Ragnarok 1 to drive magnapans and it went into fault mode and will not recover. He just sent it in for evaluation and repair.
Thank you again Paul
Somehow reminds me of DSD, but with PDM instead of PWM.
Very similar basic principle.
Indeed you can feed a PDM signal into a class D amplifier and therfore stay fully digital, i.e. like this IC does: datasheets.maximintegrated.com/en/ds/MAX98358.pdf
PDM is basically PWM w/o clock sync requirement.
Either way, you make the waveform from the high/low digital level low-pass filtered to make it into analog. Most class D amplifiers are however operating with analog input that then gets translated to the PWM to drive the switching of the amplifier transistors and with analog feedback.
🤗THANKS PAUL… I think I get the picture 🤔🤗😁😍😍😍
Paul, please explain Class H amps.
Class H is simple. It's a normal class AB output stage, but the supply voltage can be changed.
You sir are an absolute Gem. You've just answered my questions about Class D. I have saved some pennies and I'm current looking at buying a mini 2ch class d hifi amplifier to suit Q Acoustics 3020i Bookshelf Speakers. I'm in the UK. Any further advice or links to your products would be really helpful. Excuse my ignorance. Loved watching your channel during the lockdown. Respect your thoughts.
Audio Science Review has a great collection of tested products that can help you determine if what you're looking for is actual decent quality. Don't pay attention to subjective reviews.
lost me at there's a clock and its looking
! Sounds good Paul but does it SOUND good-Paul? Lol
Dude you drew a OP-amp in the first drawing
Magnapan+crown ice module class D amplification= magic.
Question for Paul or anyone else.Would a Class D amplifier benefit from a thicker shielded aftermarket/diy power cord???
Please...I need help with a question.
I'm building my home theater...I'm in love with the sound from Arcam AVR21 (yes the new model)...it's rated at 90wpc. If I bought (as example) any external 7ch amp that has (let's say) 200wpc and then hooked it up (now the question)
Would I be getting the sound signature from the AVR, or the external amp. I don't care for denon or yamaha with my klipsch heresy IV, relative to Arcam. Arcam just simply sounds better to my ears.
I have a great yamaha rxa3080 (until i heard my RF7iii/64iii on arcam)...but prefer the sound of Arcam. So when it comes to my second room, is it as simple as getting an Arcam Amp to gain their sound?
Hope that makes sense...and any advice on where sound signatures come from when adding separates is appreciated.
Take care, Tommy.
It's both. You get the sound of both and depending on what you set the volume of each source to, you'll get a matching output. Be careful not to blow up the inputs on your preamp. You want to ensure that the source is outputting what will sound best and does so without clipping.
Use an oscilloscope or, if you know what to listen for, use your ears.
@@orangejjay thank you!
Thanks Sir for the info
You lost me this time, Paul. Still love to watch you at work.
Good video I always interested in Class D amps love how they can be so small but powerful
And you should be interested in 3 dB more efficient speakers. Then half the waste heat doesn't go into the speaker enclosures, or 6 dB...
Paul can you do a video on how I can uncross my eyes?🤣
I’d like to hear a class D amp
What if we substitute the common transistor used in Class AB, change the circuit a bit and obtain 75% efficiency from it?
I think you would have to elaborate on that
@@maxb.simonsen2459
Like for example a totally new type of transistor made of different materials capable of higher switching speeds and less current draw etc.
@@Bassotronics Sorry, that's not how it works :)
A class AB is inefficient by design, not by choice of components if that makes sense. The class AB design is not a switching amp.
@@maxb.simonsen2459
I thought the transistors had to switch rapidly in order to do their job.
@@Bassotronics Well that's class D.
I'm curious to know what "tweak" there is to my Rogue Audio Sphinx V3 hybrid amp. It's a combination of tubes and Class D. I'm not the real scientific type. It just sounds great!
The tubes on those are strictly for looks. It's 100% a class D amp. Not sure what "tweak" you're speaking of. If it sounds great to you, that's all that matters.
@@orangejjay I can't imagine why you'd say that those tubes are "strictly for looks"? Clearly, they're part of what makes the amp a hybrid. czcams.com/video/guzgjKrc6IA/video.html
Ok I got it but a HMI inspector would fail this lesson, sorry Paul. He would say preparation , preparation & more preparation so it just runs silky smooth without digression. Keep the videos coming though because we love them.
Now we know how long in advance Paul makes the videos. 2nd of May on the calendar and today is the 28th of June. Paul could be on holiday for 8 weeks without us noticing. Just like the sun. If it stops we would not know for 8 minutes. Just saying :)
Ahhh, so that's why he never replies, he is elsewhere lol
Not really i think it just because he forgot to shift the red block…..lol
@@sundaru1 Or perhaps the last time anyone at ps audio had a good idea (and wrote it on that board), was on the 2nd may ;)
May 2nd is the date that's highlighted ... that's not the current date that this is filmed. Come on, man. You know better than that.
@@geddylee501 He's laying low after the Audio Science Review and power regenerator debacle.
What I wonder is if Paul realizes his white board drawings are hard to see.
now we need speaker with 90 % efficiency and the next hifi System is very WAF friendly
Love my PS Audio S300 amp, but I still have no clue how class D works....
A class D amplifier switches between and the plus and minus voltage rail, no resistance involved. If you regulate between the plus voltage rail and ground (for positive voltages) and between ground and minus voltage rail (for negative voltages) there is always resistance involved. Only at the moment of clipping there is full efficiency.
@@JerryRutten Thank you, appreciate the explanation.
So DSD is a digital Class D system.
*ATI* makes _outstanding_ Class D amps.
Hypex.
@@jasonkillsformomy , they sound greaaat
@@googoo-gjoob Well I don't believe you can hear differences in amps. ATI has an unusual long warranty for an amp or any hifi product for that matter. Are you familiar with Cherry amps from The digital audio company?
@@jasonkillsformomy , thats a hoot!
It was a struggle ... lol 😂😂😂
it's just a switch mode power supplies no difference
And not much discussion about the power supply’s contribution to the sound
if you can create a real one, with all the circuits and boards fully drawn, we will subscribe. :D
Question is why Paul makes class D amps ?
Market demand
The changing of the stairsteps of class d trash uses the filter to make it resemble an analog signal.. but its not.. top shelf...
That was very confusing 😅
Couldn't make heads or tails of it. Please redo properly.
2022 still pure class A SE will outperform most amplifiers in musicality. Yes, I’m aware of that they are inefficient..
Paul, I love your videos but you're no good at explaining technical stuff. :-)
If you didn't understand it, I can explain it to you in a way you'll definitely get it. Paul is right, its just the way he explains it hard to follow.
Pascal, ICEpower, Hypex and Purifi measure so good that there is no reason to use AB amps.
lolz.
@@Roof_Pizza I'll bite. What reasons other than if you like excess heat and power consumption would there be to use AB amps?
@@jasonkillsformomy What excessive heat? My amps run cooler than many class D amps and the fans haven't turned on once in 20 years, some class D run their fans 24/7. New doesn't equate to better. Look at all the crappy sub amp failures out there, almost all class D. Manufacturers love cheap shit more than they love durable shit, that's why you see some jump at class D while others don't touch them at all. Call me when a class D has outperformed a class A/B and has done so for 20 years. Oh, and many still sound like shit as well let alone don't give you 200 watts/channel which is the only reason why I'd consider one. And seriously, how much do you think it costs to power an amp? Anything else?
@@Roof_Pizza If a D runs it's fans all the time then that's the way the manufacturer intended them to be run and be on the safe side. What amp does this? The D amps I have seen don't even have fans because they don't need them. I'm talking about speaker hifi amps and not plate or pro amps. Newer said new equate better. There is no proof that D fails more often than AB. Pro amps have been using D forever. Everything nowadays is planned obsolescence anyway. Sure sub amps fail, but that's usually some really cheap stuff. Never heard of Pascal, ICEpower, Hypex, Purifi, Speakerpower or Cherry failing. And by that I mean I mean out of the occasional fluke. There is not a single product made in history that has not failed. Even Toyota and Honda brakes down sometimes. And that's 99% of the time do to user neglect. "Sounds like shit" Well some people imagine they can hear differences in cables, DACs, CD players, lunar phases and whatever. Not a single person have done this in a scientific controlled double blind test. Ever. And I Don't know what amps you have been looking at, but 200W is nothing for todays D amps. You can buy D with thousands of watts per channel. I'm not saying there's anything wrong with AB. D is just more efficient. Some people and not just audiphooles don't want to make changes. Some people own all their life the same brand of car as the first one they got or the same brand as their parents used.
@@jasonkillsformomy LOLZ. Looks like you and Schitt are on the same page.
'Vidar is nothing less than a no-excuses, exotic-topology, Class-AB, linear-supply, microprocessor-controlled, power-doubling, dual-mono-ish, intelligently-managed, drives-almost-anything power amp. No Class D, no switching supplies, no fans, no compromises, nothing in the signal path but music-for a three-figure price tag.'
Tell me again how much it costs to run an amp!!! I think I'm at ~ 175,000 almost continuous hours.
This was not one of your better videos, too much indecisiveness in the explanation
It's because he's not an educated engineer as he would have us believe. He's a salesman first and whatever else second.
So, a class D amplifier is twice as efficient as a class AB amplifier and four times as efficient as class A amplifier. Wow!
O, wait a minute, that's only a 3 dB and a 6 dB difference. And when I give the class AB a 3 dB more efficient speaker and the class A a 6 dB more efficient, than all three have the same efficiency!
And, now the funny part. Same efficiency, means an equal amount of waste energy in heat. For the class A we have a nice heavy heat sink, and for the class D amplifier with the 6 dB less efficient speakers we have a closed enclosure for at least mid and tweeter, even with some insulation (wood and damping material), for the woofer we have hopefully a "vented" enclosure with not so much insulation...
And, on top of that, the last one heats up more and gives earlier and more power compression (till 6 or 6.74 dB at maximum rated power). So, some of the efficiency gain gets lost.
So, if you want more efficiency, choose more efficient speakers! And get rid of the passive crossovers, with a 2-way you gain an extra 3 dB, with a 3-way 4.8 dB and with a 4-way an extra 6 dB, plus some extra efficiency for the lack of insertion loss.
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