170 class D sub amp

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I have get the ic's from national and I have made up a dobble side pcb using the layout in the applications note.
Now im just not sure that I can finist because it sound very complicated the way it have to be tested the first time.http://www.national.com/pf/LM/LM4652.html

Is it just waist of time I just find it very interesting to haer how class d sounds. for sub sulition?

have any one build similar project?
 
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