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Old 23rd August 2007, 11:07 PM   #1
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Default DIY 12v amps?

are there any kits out there? i love how small these chipamp things are. would love to make some car audio stuff like that. make some decent multi channel amps in one case. Pure amplification only, no filters/crossovers.

I havent seen anything like that, did a bit of searching but came up with nothing.
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Old 23rd August 2007, 11:28 PM   #2
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Default Re: DIY 12v amps?

Quote:
Originally posted by internecine
are there any kits out there? i love how small these chipamp things are. would love to make some car audio stuff like that. make some decent multi channel amps in one case. Pure amplification only, no filters/crossovers.

I havent seen anything like that, did a bit of searching but came up with nothing.
Take a look at the Tripath kits at 41hz.com. The AMP3 is suitable for 12V single supply operation, and should get you ~15W of low THD+N power into 4 ohms. It's pretty cheap to boot.

If you're willing to build an SMPS, some of the larger kits would be good for a lot more power at a higher voltage. AMP1 will get you 100W into 4 ohms, but would require a +/-30V supply.

I just finished an AMP5 kit, and while the documentation isn't the greatest, the board quality is very good and the included parts are good quality as well. It sounds very good.
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Old 24th August 2007, 03:25 AM   #3
cdx2000 is offline cdx2000  Viet Nam
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TDA1557Q
2 x 22 W BTL stereo car radio power amplifier with speaker
protection
I've done, it's simple to build.
Some picture, low quality because I using my phone camera
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File Type: jpg image_00037.jpg (26.7 KB, 428 views)
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Old 24th August 2007, 03:25 AM   #4
cdx2000 is offline cdx2000  Viet Nam
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Another picture
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Old 24th August 2007, 04:24 AM   #5
cdx2000 is offline cdx2000  Viet Nam
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For more information: http://cdx2010.blogspot.com
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Old 24th August 2007, 07:13 AM   #6
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internecine:

The cost of a kit amp that's going to be high quality and reliable (proper protection circuits) is going to be significantly more than the cost of the amps coming out of Asia. I was going to produce some power supplies (heatsinks included) for amps in the 400 watt range but the cost would have been much too high.
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Old 24th August 2007, 02:17 PM   #7
cdx2000 is offline cdx2000  Viet Nam
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Quote:
Originally posted by Perry Babin
internecine:

The cost of a kit amp that's going to be high quality and reliable (proper protection circuits) is going to be significantly more than the cost of the amps coming out of Asia. I was going to produce some power supplies (heatsinks included) for amps in the 400 watt range but the cost would have been much too high.

How about the cost?
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Old 24th August 2007, 10:16 PM   #8
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The power supply would have been in the $150-180US range. An amplifier would be in the $250-300US range.

The cost is considerably higher to build somehting like this because you don't get the discounts you would when purchasing hundreds or thousands of heatsinks, boards, end plates... as you would in full production runs.
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Old 5th September 2007, 12:36 PM   #9
speaker is offline speaker  United States
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Quote:
Originally posted by cdx2000
For more information: http://cdx2010.blogspot.com
Your link is
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Old 5th September 2007, 08:46 PM   #10
cdx2000 is offline cdx2000  Viet Nam
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Yep, I've moved. New url is http://cdx2000.blogspot.com
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