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DIY 2 CHANNEL AMP? Answered

Hey guys,  I have been thinking, and I am going to build some solar speakers.  Now this is not my first time building solar speakers, so I know how to wire everything.  The only difference is this time I want to want to build my own amplifier.  I want to build a 2 channel 60-80watt amplifier.  I haven't found any schematics online that are similar to those, and I would want to wire in an off switch, a volume knob, a bass knob, and a treble knob.  Also, I would want to wire in an 3.5MM jack at the minimum.  If anybody could help me with some schematics and a list of parts, that would be wonderful.  Also, if anyone knows how, is it possible to wire a USB port onto here that will not only charge the device, but would also play music from the device to the amp.  Any help would be greatly appreciated.

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Athelestan (author)2012-12-11

Is there a certain one that works considerably better than the others that might have a parts list and somewhat of instructions? This is my first time, and thank you guys for all the help!

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user
Athelestan (author)Athelestan2012-12-11

Also, if it was efficient as possible, because this will be running off solar/battery power

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iceng (author)Athelestan2012-12-11

Perhaps if you read better what Steve pointed out for you.

120 Watts of solar electric energy
is LOT of POWER....

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user
Athelestan (author)iceng2012-12-11

yes I know that, take in mind that is the max power, and I will be having a lot of batteries. Also, I will rarely be running the speakers on full volume..

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iceng (author)Athelestan2012-12-11

Sorry to be yelling.

If your first time the transistor version is more understandable
for a beginner.

Good Luck and Happy Holidays :)

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user
Athelestan (author)iceng2012-12-11

No problem, sorry for being unknowledgable haha, happy holidays!

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steveastrouk (author)2012-12-11

A 2 channel 60 W amp is 2, 1 channel 60W amps. There are dozens of circuits for those.

Here's one simple one, based on the TDA 2052
http://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/DATASHEET/CD00000208.pdf

Here's a discrete amp (made of transistors)
http://electroschematics.com/269/audio-power-amplifier-60w-with-2n3055/

If "a solar speaker" is one powerered by solar panels, you need a lot of panels to run 120 W of speaker at full power, and you should aim to use a class D amp, for the best efficiency.

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mpilchfamily (author)2012-12-11

You couldn't find any 60-80 watt amp schematics online???

Sure you may not find a simple schematic that already gives you a 3 band equalizer built in. You'll have to find a separate schematic for that which isn't hard to do. Adding an on/off switch and headphone jack is pretty straight forward.

Adding USB on the other hand... There are plenty of small USB soundcard devices on the market. Buy 1 and splice a wire from the output 3.5mm jack on the device to your amp. Then splice a pair of wires from the power pins on the USB plug and run that to whatever charging circuit your using.

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rickharris (author)2012-12-11