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10W audio amp? Answered

ok, so i want to get this one audio amp to work, but i can't seem to figure out how to wire it! the first picture is a schematic, and i have NO idea what the connections are, 1, 2, and 3 the second is a picture of the amplifier chip

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westfw

10 years ago

  • (1) is the signal input.
  • (2) is the power supply positive voltage.
  • (3) is signal and power "ground."
  • Rx/Cx prevents high-frequency oscillation

There's more info in the TDA2003 datasheet, including a PCB layout. If you haven't seen it.
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Sandisk1duowestfw

Reply 10 years ago

Thanks! i've seen that datasheet, but i couldn't make sense of the schematic I do not make pcbs, i just solder the components to each other and to the chip, looks bad, but it works!

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gmoonSandisk1duo

Reply 10 years ago

Use a heat-sink, if you're aiming for 10 watts...

From the datasheet, looks like you need a 2 ohm load for 10W output. Use several speakers in parallel (four 8 ohm speakers == 2 ohms.)

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guyfrom7upgmoon

Reply 10 years ago

or 2x 4 ohm speaker in parallel

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Sandisk1duo

Reply 10 years ago

ya, $85 for yours, or i can make my own for free

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bumpusSandisk1duo

Reply 10 years ago

Mm, it would seem to be a toss up... :D

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bumpus

10 years ago

Well, you could skip all the confusing parts, and buy mine
:D