DIY 12v amps?

internecine · 23rd August 2007, 11:07 PM

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.

error401 · 23rd August 2007, 11:28 PM

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.

cdx2000 · 24th August 2007, 03:25 AM

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

cdx2000 · 24th August 2007, 03:25 AM

Another picture

cdx2000 · 24th August 2007, 04:24 AM

For more information: http://cdx2010.blogspot.com

Perry Babin · 24th August 2007, 07:13 AM

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.

cdx2000 · 24th August 2007, 02:17 PM

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?

Perry Babin · 24th August 2007, 10:16 PM

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.

speaker · 5th September 2007, 12:36 PM

Quote:

Originally posted by cdx2000
For more information: http://cdx2010.blogspot.com

Your link is

cdx2000 · 5th September 2007, 08:46 PM

Yep, I've moved. New url is http://cdx2000.blogspot.com

23rd August 2007, 11:07 PM	#1
internecine diyAudio Member Join Date: Mar 2007 Location: USA	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.

24th August 2007, 07:13 AM	#6
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	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. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

24th August 2007, 10:16 PM	#8
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	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. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

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24th August 2007, 04:24 AM	#5
cdx2000 diyAudio Member Join Date: Nov 2005	For more information: http://cdx2010.blogspot.com

5th September 2007, 08:46 PM	#10
cdx2000 diyAudio Member Join Date: Nov 2005	Yep, I've moved. New url is http://cdx2000.blogspot.com

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