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#1
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AES Show Report
It's up!
http://positive-feedback.com/Issue77/aes14.htm http://positive-feedback.com/Issue77/aes14_awards.htm -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
#2
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AES Show Report
On Saturday, January 3, 2015 5:21:06 PM UTC-5, Scott Dorsey wrote:
It's up! http://positive-feedback.com/Issue77/aes14.htm http://positive-feedback.com/Issue77/aes14_awards.htm -- "C'est un Nagra. C'est suisse, et tres, tres precis." scott that was terrific thanks. What is it about class d amps you don't like? I have some experience on the instrument amplifier side and I've been finding disillusionment in them, but I cannot say if that is a function of the class d amp itself, or the design of the entire package. But I had the new PMC two.two near fields here for a few weeks and they are powered by the newer hyped class d amps and they were impressive all around. |
#3
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AES Show Report
Nate Najar wrote:
What is it about class d amps you don't like? I have some experience on th= e instrument amplifier side and I've been finding disillusionment in them, = but I cannot say if that is a function of the class d amp itself, or the de= sign of the entire package. But I had the new PMC two.two near fields here= for a few weeks and they are powered by the newer hyped class d amps and t= hey were impressive all around. It's just an awful lot of stuff in that box that has to be designed just right in order to get the kind of linearity that is easy to achieve with a simple Class B design. The PWM controller turns out not be as simple as people had thought... any transients at the switching stage cause some weird artifacts.... even the integrator is possible to screw up, and just throwing overall feedback across everything and hoping it linearizes everything doesn't work any better than it did in the Dynaco ST120. I'm not saying the Class D design doesn't have use, but unless you are desperately concerned about weight and efficiency, I don't see a great point in it. And, I'm writing for an audience of people who (presumably) consider sound quality of paramount concern. That said, I am getting ready to load a rack of four Urei studio monitor amps into a truck for a film festival gig in Boston, and I am not looking forward to the experience. A similarly-powered Class D amp would fit in my pocket... but really the Ureis sound good... --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
#4
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AES Show Report
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#6
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AES Show Report
On 5/01/2015 8:21 a.m., Scott Dorsey wrote:
Nate Najar wrote: What is it about class d amps you don't like? I have some experience on th= e instrument amplifier side and I've been finding disillusionment in them, = but I cannot say if that is a function of the class d amp itself, or the de= sign of the entire package. But I had the new PMC two.two near fields here= for a few weeks and they are powered by the newer hyped class d amps and t= hey were impressive all around. It's just an awful lot of stuff in that box that has to be designed just right in order to get the kind of linearity that is easy to achieve with a simple Class B design. The PWM controller turns out not be as simple as people had thought... any transients at the switching stage cause some weird artifacts.... even the integrator is possible to screw up, and just throwing overall feedback across everything and hoping it linearizes everything doesn't work any better than it did in the Dynaco ST120. I'm not saying the Class D design doesn't have use, but unless you are desperately concerned about weight and efficiency, I don't see a great point in it. And, I'm writing for an audience of people who (presumably) consider sound quality of paramount concern. That said, I am getting ready to load a rack of four Urei studio monitor amps into a truck for a film festival gig in Boston, and I am not looking forward to the experience. A similarly-powered Class D amp would fit in my pocket... but really the Ureis sound good... --scott How about a compromise - Lab Gruppen's 'essentially' Class AB power amps powered from a Class D amp configured as a tracking power supply ? Though never had a problem with straight D amps since a few years ago. Earlier ones often had weird swooshing background noise if you stuck your ear right up to speaker .... geoff |
#7
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AES Show Report
Scott Dorsey wrote:
It's up! http://positive-feedback.com/Issue77/aes14.htm http://positive-feedback.com/Issue77/aes14_awards.htm So Scott - can you tell us who was the panel hog at the worst panel? And linik us to a picture of Charlene? Just sayin... Gary Eickmeier |
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