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Chip Amps Amplifiers based on integrated circuits

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Old 9th December 2010, 02:04 PM   #1
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Default Cheapest Chipamp Amplifier?

Hi guys, im trying to build the cheapest possible amplifier, at least 50 Watts and low THD

Can someone please tellme some amplifier with that specs?
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Old 9th December 2010, 02:23 PM   #2
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LM3886 with some external components.
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Old 9th December 2010, 02:45 PM   #3
AndrewT is offline AndrewT  Scotland
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why two threads with the same question?
Cheapest Solid State Amp?
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regards Andrew T.
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Old 9th December 2010, 06:31 PM   #4
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The majority of the expenses are usually the somewhat generic parts like the case, the heatsink, the power supply, etc. If you can build these with recycled parts you will save a lot. I always grab up old receivers/amplifiers whenever I see them for free heatsinks and transformers.
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Old 9th December 2010, 06:37 PM   #5
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Quote:
Originally Posted by AndrewT View Post
why two threads with the same question?
Cheapest Solid State Amp?

Im trying to build 2 diferents amplifiers, one with chipamps and other with discrete components!
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Old 9th December 2010, 06:39 PM   #6
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i already build some LM3886 and 4780 amplifiers, but expensive kits. Using less components will sound the same? :S some link to some low parts chipamp¿
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Old 9th December 2010, 07:02 PM   #7
godfrey is offline godfrey  South Africa
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For lower cost, use point-to-point wiring instead of a PCB.
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Old 10th December 2010, 08:23 AM   #8
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check the product pages from national semiconductors:
3886
4780
there are some datasheets right there where you can find application circuits

i believe the whole circuit (minus power supply) should be under 10 elements for the lm3886. i'm actually about to build a 4780 myself, be sure to post as you make progress!
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