Hello Nelson and Carlos
You've nail it !
Class D are uninvolving and sterile.
An involving sound with a live sound stage are related to the lowest level of music harmonics, class D just chop those harmonics and ad noises to the final result, we can use higher switching frequencies and better output filtering, but we still get an uninvolving sound from those class D amps.
Long live to class AB amps 😎
Bye
Gaetan
You've nail it !
Class D are uninvolving and sterile.
An involving sound with a live sound stage are related to the lowest level of music harmonics, class D just chop those harmonics and ad noises to the final result, we can use higher switching frequencies and better output filtering, but we still get an uninvolving sound from those class D amps.
Long live to class AB amps 😎
Bye
Gaetan
Last edited:
...that sound like crap.
Class AB SS amps are made after tube class AB amps. But they are very different beasts, so what works well for tubes does not work for SS devices.
I posted recently my schematic of class AB output stage, that switches by shortening tails in complementary long tail stages, unluke that vast majority of transistor amps that starve output devices in crossover region.
Class D amps sound much better than class AB amps because their cross-over region is low in level and short in time.
The best sounding (potentially!) is still single ended class A topology, but it wastes power. Class A+C is something in the middle, it is nice sounding, but still efficient. It has cross-over region on much higher levels that class AB amps, when class A amp still works on any level of power, and class C assists it smoothly adding current to output starting from some value.
Hello Wavebourn
That was just a little joke.
Btw, I have tube amps, ss amps, chip amps, etc... but class AB ss amps are my favorite, it's now a more mature design class and there is lot of possible designs variations that we can do.
I agree that class A are superb sounding but as you said it's so hot and do waste lot of energy.
Bye
Gaetan
Last edited:
From what Ive noticed here at DIYAudio, that usually means accurate, very low distortion.
Last edited:
Anything that weighs practically nothing that spurts out oodles of power would be fine😀
It's funny that Levinson should mention the weight saving, the Musical Fidelity KW750 puts out more power then the class D Levinson, but weighs less in total - 115lbs and that's with two completely separate chassis. Some Krell offerings, providing more or similar power also weigh less.
Hello
Every years I go to the Montreal audio show and none of their class D amps was involving.
I'm not the only one who say that class D amps are not involving.
I don't say that class D amps are crap and bad sounding but they are not as good sounding as a very well design class A or class AB.
Bye
Gaetan
Last edited:
I wouldn't want to jump to conclusions.
I use three of their regular class a/b jobs and those are frankly the best amps I've come across. Also heard one of their a/b jobs with switching psu and it was indistinguishable. If their class d is anything like those (and I have no reason to doubt them) that would be very impressive indeed.
E90
Those that belive class D sounds "uninvolving", would you agree that on low frequency duty below 450hz it is quite acceptable?
I get all my goosebumps from solid tight bass and lush, warm and realistic upper frequency. I get this warmth from Class A Krell, F5, Aleph 5, and tubes, but not the Icepower/Hypex/Tripath amps I have built.
I will say the Tripath feels closest, while Icepower has the "thump". Again all are good amp.
No flaming here...just my 2 cents...
I get all my goosebumps from solid tight bass and lush, warm and realistic upper frequency. I get this warmth from Class A Krell, F5, Aleph 5, and tubes, but not the Icepower/Hypex/Tripath amps I have built.
I will say the Tripath feels closest, while Icepower has the "thump". Again all are good amp.
No flaming here...just my 2 cents...
Last edited:
D-Class has its indisputable place on the market: PA (efficiency, power/weight ratio, active bandpass), consumer (power/price/weight, ECO, TV/HTC), low budget unpretentious systems and all these represent 99,90% of the market. For the 0,10% minority of the people with special needs (music involvement at home, pure quality) D-Class is simply not an option, there are a lot of others to choose.
BTW, I heard in my system Tripath, UCD, Hypex, Rotel, ICE Power, Lab Gruppen, Devialet, all in home environment and they couldn't stand a chance to any of my A-A/B amplifiers.
BTW, I heard in my system Tripath, UCD, Hypex, Rotel, ICE Power, Lab Gruppen, Devialet, all in home environment and they couldn't stand a chance to any of my A-A/B amplifiers.
I wouldn't say that they are unacceptable in any venue, it's largely a matter
of taste. I can only observe that in my humble opinion, they don't achieve
top rank in 2 channel reproduction in my own system. I can only say this
because I have a few examples that sound better to me.
If I were watching a movie or driving a car, I don't think there would be
much issue that they can do the job. I have no reason to think they can't
do justice to bass alone, but I'll have to get around to trying it on the
bottom of my OB Lowthers.
😎
E90 Stereo class D amplifier giving 4800 watts in 4 ohms, that's a lot of power, okay nice.
Nominal power consumption @ 240 volts into a 4 ohm load = 5.6 amps?😕
Someone's either fibbing the numbers somewhere, or they've managed to break the laws of physics. Even if they've only managed to do this on the small scale in the size of the chassis, I would sure like some of whatever it is they are using.
They go so far as to mention what the expected current draw could be under light and heavy usage, but never mention the maximum current draw that the amplifier is capable of. They also say that for details on their power measurement procedure look on the tech support section of their website, yet on looking there's nothing there🙄
Either that thing can do 16400watts bridged in 4 ohms or it can't. That's going to draw 70 amps @ 240v even if the thing is like 99% efficient. The maximum they ever mention it drawing is 18 amps @ 240 volts. Seems like some form of peak power is what they are talking about, where the thing can actually put out around a maximum of 2000 watts continuous per channel.
Hi,
It can!? I am shocked. And there are all these idiots talking about dead time, limited switching speed of output devices and comparators and so on and all that that was complete BS because they do not exist...
Really!? So we can make a Class D Amp with 100Hz switching frequency but still get signal Bandwidth!? Again, this is news to me, but sure as heck it makes design easier if there is no need to push high switching frequencies.
Shall we say perhaps that an IDEAL Class D Amplifier using ideal (infinite speed, zero storage effects etc.) switching devices in all stages with INFINITE switching frequency would conform to your description?
And that in most relevant ways REAL Class D Amplifiers behave very different from IDEAL ones and that it is precisely these differences from Ideal which limit the performance?
Ciao T
It can!? I am shocked. And there are all these idiots talking about dead time, limited switching speed of output devices and comparators and so on and all that that was complete BS because they do not exist...
Really!? So we can make a Class D Amp with 100Hz switching frequency but still get signal Bandwidth!? Again, this is news to me, but sure as heck it makes design easier if there is no need to push high switching frequencies.
Shall we say perhaps that an IDEAL Class D Amplifier using ideal (infinite speed, zero storage effects etc.) switching devices in all stages with INFINITE switching frequency would conform to your description?
And that in most relevant ways REAL Class D Amplifiers behave very different from IDEAL ones and that it is precisely these differences from Ideal which limit the performance?
Ciao T
It would tale quite a bit of time to find the article. But one reviewer wrote an article on the exact same amp being marketed by many different companies. The price varied quite a bit. Not exactly audiophile quality from what I remember. Large transformers amd large capacitance storage capability a must for good solid state. I like tubes but the price is fairly high and my speakers are current hungry.
I ordered today a 4x100W class D kit from PartsExpress. Let's see, how it works...
I am going to try it in 2x100W sub and 2 100W woofers.
I am going to try it in 2x100W sub and 2 100W woofers.
- Status
- Not open for further replies.