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Class D Switching Power Amplifiers and Power D/A conversion

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Old 17th July 2009, 11:10 AM   #11
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I sure wouldn't mind too. Just for the heck of it...

Oon
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Old 17th July 2009, 01:07 PM   #12
hoka is offline hoka  Netherlands
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oon, you're closer, go get some!
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Old 17th July 2009, 02:08 PM   #13
wwenze is offline wwenze  Singapore
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Singapore location with a Malaysia flag...?

It's not easy to get things from taobao... most of them only deal within mainland China, if lucky maybe Hongkong. They don't ship overseas and accept only Chinese credit cards.

Then there's the problem of fake products and no warranty also.
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Old 18th July 2009, 05:49 PM   #14
Havoc08 is offline Havoc08  Denmark
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Does the amp linked have 8 channels or only 6 channels (but the ddx-8001 supports 8 channels?).

Can you make a power amp that accepts digital signals from DAC, DVD, PC etc. including surround from this amp?
Does it involve some sort of digital control of volume and inputs or how do you do this with an all digital amp (I have built many class-t amps but they pwm amplify an analogue signal).


The site linked seems impossible to buy from without knowing the language. Can someone help buy 4-5 boards if the amp supports the above mentioned things?
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Old 20th July 2009, 03:19 AM   #15
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Quote:
Originally posted by Havoc08
Does the amp linked have 8 channels or only 6 channels (but the ddx-8001 supports 8 channels?).

Can you make a power amp that accepts digital signals from DAC, DVD, PC etc. including surround from this amp?
Does it involve some sort of digital control of volume and inputs or how do you do this with an all digital amp (I have built many class-t amps but they pwm amplify an analogue signal).


The site linked seems impossible to buy from without knowing the language. Can someone help buy 4-5 boards if the amp supports the above mentioned things?

The PCB gave 3 pcs of 2001 only. That why the PCB can provide 6 Channels only.
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Old 20th July 2009, 03:21 AM   #16
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Sorry, should be 3 pcs of DDX 2100.
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Old 20th July 2009, 03:33 AM   #17
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Quote:
Originally posted by Havoc08
Does the amp linked have 8 channels or only 6 channels (but the ddx-8001 supports 8 channels?).

Can you make a power amp that accepts digital signals from DAC, DVD, PC etc. including surround from this amp?
Does it involve some sort of digital control of volume and inputs or how do you do this with an all digital amp (I have built many class-t amps but they pwm amplify an analogue signal).


The site linked seems impossible to buy from without knowing the language. Can someone help buy 4-5 boards if the amp supports the above mentioned things?

The PCB looks like the evaluation board. EB-8001 evaluation borad. See below: http://www.apogeemems.com/ddx/ddx_evaluation.html

But the spec sheet is too complicate for me. If you are electronc engineer, you can get similar PCB from offical homepages.

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Old 20th July 2009, 05:57 AM   #18
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Location: Wisconsin....what did you expect?
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The real question is: How much juice would a computer need to function as an active crossover, and would the results be any better than a DCX2496 plus an off-the-shelf class-D amp?
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Old 20th July 2009, 06:38 AM   #19
hoka is offline hoka  Netherlands
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Hey Panda360, can you get these boards for us?

I'm not an engineer so the official channels are out
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Old 20th July 2009, 12:46 PM   #20
Havoc08 is offline Havoc08  Denmark
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Nice... thank you panda.
Since I don't want a pc turned on to control the amp and don't have the skills to program something standalone like the spherex set. I'll have to pass on this one.

The Tripath amps have better specs, are easier to input select, volume control etc. as they are analogue, but unfortunately doesn't feature those nice advanced settings like xover, pwm timing etc.

I'd better stick to the T-amps
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