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Class D Switching Power Amplifiers and Power D/A conversion

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Old 14th June 2011, 10:13 PM   #51
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Quote:
Originally Posted by Bruno Putzeys View Post
It seems we've shifted 6 UcD400HG's for every UcD700HG.

my guess is the 400 is at a nice place in the price/performance curve.
(I thought so) Though I'm sure the 700 is nice...

Quote:
Originally Posted by kevinh View Post
Ideally the input would be a discrete Fet stage, but.....
what would be really great is a good input buffer such as the 4562 or 2134 (I'm happy with the 400HG) and also some flexibility in the PCB for easy bypassing. if we look at the type of things the DIY crowd has done with the current UcD's... such as bypass the opamp input buffer/gain stage for a tube gain stage

As Bruno mentions good diy accessible connectors are a great start.
 
Old 14th June 2011, 10:17 PM   #52
cOz is offline cOz  United States
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My vote would be for simplicity and modular design. I know those are somewhat opposites but a buffer is great, even better is a buffer as an add on board so you don't force everyone to use it.

As a beginer its great to have a clear path to sucess. Advanced users want maximum flexibility not sure how to square those?
 
Old 14th June 2011, 10:20 PM   #53
avr300 is offline avr300  Denmark
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Quote:
Originally Posted by Bruno Putzeys View Post
It seems we've shifted 6 UcD400HG's for every UcD700HG...
Wonder if those numbers scale linearly down to the UcD180 ?
 
Old 14th June 2011, 10:46 PM   #54
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Quote:
Originally Posted by Bruno Putzeys View Post
Funny... I thought that by now I'd have been inundated in requests for this op amp or that... I suppose that means it wasn't too bad on the old HG series then
Well, I do recollect reading a post of yours concerning a discrete input stage.. I certainly wouldn't mind.

Quote:
Originally Posted by Bruno Putzeys View Post
I just had a quick look at the DIY sales figures for the past year. It seems we've shifted 6 UcD400HG's for every UcD700HG.
Makes sense, if you consider the price difference and the fact that they had the option of cutting down a bit on power in order to get a Hypex within their budget.
Btw, the owner(s) of those 6 modules will have one more reason to upgrade to the new NC1200-grade modules (see: extra power).
 
Old 14th June 2011, 10:51 PM   #55
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Quote:
Originally Posted by avr300 View Post
Wonder if those numbers scale linearly down to the UcD180 ?
About twice the number of 400's. Clearly the big cut-off point is between 400 and 700.

The raw Ncore input is a [dog of the female persuasion] to drive. You need a buffer with [something said animal lacks] to handle it. I'm half given to trying a buffer design that's so good nobody would want to bypass it. Or is that the hubris of a mere power amp designer?
 
Old 14th June 2011, 10:59 PM   #56
cab is offline cab
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How about this: damn the torpedos, use the best of everything and configure it the best way you know how. Make it a statement that once and for all makes believers out of the class d naysayers...ok, I know that last part is asking for too much but one can hope...
 
Old 15th June 2011, 12:16 AM   #57
cOz is offline cOz  United States
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Quote:
Originally Posted by Bruno Putzeys View Post
I'm half given to trying a buffer design that's so good nobody would want to bypass it. Or is that the hubris of a mere power amp designer?
Thats a great idea!
 
Old 15th June 2011, 01:00 AM   #58
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Quote:
Originally Posted by Bruno Putzeys View Post
a buffer design that's so good nobody would want to bypass it
sounds a lot like trying to make something "fool proof"
someone will always find some reason to bypass it. But that's their problem.

go ahead and make it great!
uh, unless it ends up costing as much as a small car, then I'm out
 
Old 15th June 2011, 09:17 AM   #59
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Hello Bruno

Have you considered an all in one power amp/power supply combination similar to the ice power modules for driving subwoofers ?? It wouldn't have to be as refined as ncore as long as it could deliver 1KW into 4 ohms !! It should also offer some auxiliary power rails such as +/-15 V and 5V for driving preamps and DSP's etc ??

regards
Trevor
 
Old 15th June 2011, 10:14 AM   #60
jmbulg is offline jmbulg  Belgium
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If a large number of diy people is the target, the module should be easy to implement and/or include a few documented examples on how to do it (as a beginner I chosed the Ucd400 instead of the Ucd700 because it was easier to understand and hence less likely to be blown up, which in the case of the Ucd700 would even be worse in view of the higher price).

Providing optional autosensing power on units would be nice (for surround amps for example)
 

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