Atma-Sphere Class D Mono blocks
- Thread starter Chorus
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Sorry missed this post.
Aries Cerat Symphonia, Aurora and Contendo Reference
Living Voice Vox Olympian
Avantgarde Duo XD I heard recently was way more explosive than I remembered AG speakers being.
The bigger Acapella models
Martion Orgon
Horns Universum
Odeon Carnegie
JBL Hartsfield (with tweeters)
JBL Paragon
Classic Audio Reproductions speakers
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From reports we have and also my own experience, it plays bass just fine. We have a couple of reports suggesting that the bass took the longest during break-in, but far more reports suggest the bass was fine right out of the box. So we're looking for more data on that. My own experience has been that the bass of many class D amps from 10-20 years ago was a weak point. I think this might have occurred because the designer thought they didn't need a power supply that was all that robust, since at idle the amp draws so little power. But the fact is the power supply must support the amp at power so you can't skimp on it.
I use speakers that are 98dB in my system. I really feel that the lack of thermal compression is a boon; as I've gotten older I've really come to the position that there are no good justifications for low efficiency and low impedance; both simply mean that whatever amp driving the speaker has to work harder and all amps regardless of technology make more distortion (audible as reduced detail, a less pleasant midrange and so on). Put another way, if you really want to get the most out of your amplifier investment, this is something to which one should pay attention.
Not sure what 'more robust current than an ordinary amp delivers' might mean. Current has a very direct relationship to power; defined by a simple algebraic formula, Power = Voltage x Current. What this means is if the amp can make the power into the load, then it makes sufficient current to do so.
Now the speaker might have some dips in impedance or an odd phase angle (often caused by the crossover network). The latter, as far as the amp is concerned, acts a lot like the former. But the same rule applies: if the amp can make the power than the current will be there. If it doesn't, one of two things will happen; the amp will have a tonality issue (which won't happen if the amp can behave as a voltage source into low impedance) or it will simply clip (overload).
Since the class D has such a low output impedance, it will act as a voltage source with most speakers. So its really a matter of power; my surmise is that if 200 Watts is enough power in your room then it should be no problem.
Speakers of this type do have an advantage that since the voice 'coil' is so spread out, they tend to have less problems with thermal compression.
Thanks for the list,
Heard the Classic , JBL’s and the AG Duo and trio , the AG Trio was the only one i cared for ..!
Regards
Horse and course , BTW very high Efficiency and high sensitivity tend to be unbalanced , its why the search for a holy grail amp to balance them becomes the other journey..
So a SET of choice , for balance , its the same the other way , a large enough SS amp with the necessary current, right amt of class A Bias and feedback for low Z loads and you are off ..!
If done right you will learn that both ways can deliver. Get the choice wrong and you will be ducking under the table from those Horns ..!
Its all in the approach ..!
Enjoy
But not the Aries Cerat horns and yet you feel qualified enough o comment about them ?
” Nothing like a “666” Driver .....
“
You might want to read this:
http://www.atma-sphere.com/en/resources-paradigms-in-amplifier-design.html
When using an SET and a successful speaker with it, you're using Power Paradigm technology. A lot of speakers that have controls on the rear are designed for zero feedback tube amps. I'm lucky because my speakers have exactly that: midrange and tweeter level controls. So they allow me to get the speaker to work with the class Ds as well, which have a very good first Watt. So no worries getting the balance!
You keep stating that they are equivalent paths and they are not. You can't overcome inefficiency with power...it theoretically and audibly doesn't work.
Prove it .. !
You seem to always be mixing science with conjecture , maybe i did miss the memo to that jazz /Rock Concert powered by SET amps ..!
Feel free to educate I'm all ears ..!
But not the Aries Cerat horns and yet you feel qualified enough o comment about them ?
” Nothing like a “666” Driver .....
I guess my “666” comment went high flying ...!
I know and thanks for saying exactly what i said before about matching and balance ..
These comments just tell me you don’t know any more about what science is or isn’t than Dr. “I am science” Fauci. You conflate engineering practice with scientific understanding. Science is a methodology that involves conjecture and measurement. I am taking both into account to build a hypothesis based on general observation.Prove it .. !
You seem to always be mixing science with conjecture , maybe i did miss the memo to that jazz /Rock Concert powered by SET amps ..!
Feel free to educate I'm all ears ..!
Projecting ..?
I must have missed your scienctisk* methodology in your response..
Power necessary is a sliding scale , speaker sensitivity , listening levels and music crest factors are some of what dictates the necessity to feed the monster , this incessant my way or nothing is just nonsense , maybe Fauci did get to you after all
So no 3 watts with all levels of distortion measured that cant be heard by you is not the only way ..
But please feel free to educate me and others who’s choice is to listen to large scale lower sensitivity speakers with unclipped music with some of your science ..!
Regards
Ok, let’s see what this D class buzz is all about!
You have a set up apparently well assembled for this test, as well! Atmasphere and Classic Audio T3.4 comparing the 3.3 OTL SE Edition to the Class D. Will be very interesting to read your conclusions!
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