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Gonna Try Building a 1kW Class D Amp for Only $396
#334713 01/17/11 11:58 PM
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SRoode Offline OP
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Just put the order in for some parts to try building my own Class D Two Channel Amplifier. Saw this thread and it really intrigued me:

http://www.audiocircle.com/index.php?topic=76400.0

(For anyone even remotely interested in DIY type stuff, it's a fascinating thread)

After contacting the owner of the company who makes the amp boards(Tom, who seems like a really nice guy), I ordered a large toroidal transformer (1000VA), heavy duty power supply, and two amplifier modules which should output 500W each easily when bridged. Since they are Class D, they are much more efficient (>90% vs 50-60% for class A/B) and should put out much less heat. THD numbers look really good too. I should be getting the parts by this weekend and will do a quick assembly first to test things out and see how it sounds. I'll let you guys know how it goes.


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Re: Gonna Try Building a 1kW Class D Amp for Only $396
SRoode #334714 01/18/11 12:03 AM
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Steve, did you check out the Sure Electronic DIY amp boards at Parts Express by any chance? not sure if it's comparable at all to what you're looking at.


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Re: Gonna Try Building a 1kW Class D Amp for Only $396
Adrian #334719 01/18/11 12:16 AM
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Yep, they're in my bookmarks (as well as some others). Sure Electronics output power was much lower, and the THD+N at rated power was REALLY high (10%). THD+N at rated power for the modules I bought is <1%.


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Re: Gonna Try Building a 1kW Class D Amp for Only $396
SRoode #334723 01/18/11 12:29 AM
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do they furnish the instructions? Also, what about the case? Can you provide links?


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Re: Gonna Try Building a 1kW Class D Amp for Only $396
SirQuack #334727 01/18/11 01:00 AM
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I'll be VERY interested to find out how this goes!


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Re: Gonna Try Building a 1kW Class D Amp for Only $396
Ken.C #334728 01/18/11 01:10 AM
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They supply individual parts and kits. Instructions are supplied too (also on their website):

http://classdaudio.com/index.php/

You're basically on your own for the case, but just about any enclosure would work. For now, I'm just going to assemble it on a block of wood. If it sounds great (like most have said), I'll probably build a nice wood enclosure.

Tom also buys in bulk and will pass the savings on to you. The 1000VA toroidal transformer would go for $100 alone unshipped if I tried to buy it myself (sucker weighs in at 18 lbs alone).

Read through the thread link I posted above if you get a chance. There are some wonderful examples of systems put together, as well as some nice DIY cases. I'm pretty excited about this...


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Re: Gonna Try Building a 1kW Class D Amp for Only $396
SRoode #334738 01/18/11 03:05 AM
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Please update us with a photo or two of your build and your thoughts after completing it and taking for a test drive.


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Re: Gonna Try Building a 1kW Class D Amp for Only $396
terzaghi #334747 01/18/11 05:25 AM
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Looks good, Steve! I'm excited for you. Let us know how the build goes!


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Re: Gonna Try Building a 1kW Class D Amp for Only $396
St_PatGuy #334749 01/18/11 06:10 AM
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Very cool. I may have to look into this when I need more channels. Good luck!

Re: Gonna Try Building a 1kW Class D Amp for Only $396
SRoode #334750 01/18/11 06:51 AM
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That Class D Audio kit gets my thumbs up too.


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