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Class D Switching Power Amplifiers and Power D/A conversion

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Old 13th April 2011, 01:03 AM   #11
Bigun is offline Bigun  Canada
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Interesting, didn't know about these guys, they have a Charlize2 out now.

I think I need to read some reviews...
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Old 13th April 2011, 07:27 AM   #12
hoka is offline hoka  Netherlands
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Personal experience is way better than reviews, if you want to know about class-D amps this is the one to get (Charlize 2), you'll be surprised!
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Old 13th April 2011, 08:02 AM   #13
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I don't know if there is any technical benefits, but there a plenty of low power class D amps. Both Tripath, T.I. and NXP have several low power chips available.

At the moment I use 4x10 watt 4 ohm to power my main speakers (active cross over with MiniDSP). The speakers are normal to low sensitivity and it's enough for normal listening levels.
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Old 13th April 2011, 09:39 PM   #14
Bigun is offline Bigun  Canada
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10W would be more than enough - but they have to be sweet 10W not boominator 10W...

I'd be interested in using low power Class D in a current project - if the benefits of the lower power meant lower price and better sound quality - these are tradeoffs I find with Class A and Class AB but not so far with Class D it would seem - I'll keep reading... I guess in the end I'm comparing low power Class D modules with Chip-Amp modules and maybe that's not a fair comparison in 2011.
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Old 14th April 2011, 07:26 AM   #15
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low power class d are normally cheap. I have read a lot about class d amps, and some low power tripath chips seems to sound better than the high power ones. But I'm not shure it's because of the low power. The feedback loops have also a lot to say.

The NXP8950 I have is definately more sweet than the T.I. amp. The NXP are analog controlled with loop before filter, and the T.I. amp is digitally controlled and loop after filter. Some modules like the TC electronic (LC Audio) ones combine feedback loops.

I think it's difficult to say that it's just one element that gives a certain sound. In class A/AB it's also a fight between mosfet and bipolar transistor, and one set of transistors vs. a bunch of them etc.
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Old 14th April 2011, 07:27 AM   #16
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The NXP chips also come in very low power and different types - some are better for low impedance speaker than others.
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