Oh how I wish Class D amps ...


I sure wish manufacturers and designers would move forward as quickly as is possible on improving the current status of Class D amps ... I have heard them all, some in my own system, and they have SO mcu promise !!! Unfortunately they just do not have it down yet. They still sound dry, unmusical, and strange in the treble ... kind of chalky and rolled off, and definitely lacking air.
I long for the day I can get rid of my hundred pound Class AB monster amp, for a nice small cool running amp that sounds just as good. I am worried though that designers and manufacturers have accepted the " It sounds good enough" opinion, and that the B&O Ice power may be a long time before it is "fixed"... sigh.
Just my rant ...
timtim

Showing 6 responses by magfan

'd' amps have a pretty good phase shift in the HF range due to the Zobel. If the frequency were higher, the turnover point could also be higher, getting the phase shift above the audible range.....
Maybe that's it?
Please see first schematic::http://users.ece.gatech.edu/mleach/ece4435/f01/ClassD2.pdf
L1 / C1 are how the switching frequency is removed.....and should induce a phase shift in the audio band. No?
Simon,
Want a good example of an Analogue computer?
Please see link:

http://en.wikipedia.org/wiki/Analytical_engine

Charles Babbage could never get it together long enough to build it, but within the last decade or so, Smithsonian built one to the original drawings, and it worked fine.
The machine would have been used to calculate log / trig tables for navigators and such.
Can someone write an explanation of Power Factor?

In the case of power supplies, do you try to make the power supply look like a resistor to the power company OR the amp look like a resistor to the power supply? I don't know that a pure resistive speaker is possible.
Anybody ever heard the International Rectifier 'd' offering?

I've got a stereo module out in the garage needing a +-50 volt ps / case/ and all the wiring / connectors.

They sell OEM and I've never seem 'em referred to at all anywhere.
I'm thinking on Kij's wavelength.

I'm a current 'd' owner....some ICE amps, but the Spectron would be on any short list of auditions....and it is a pretty short list.

With the black faceplate!