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Old 15th March 2005, 07:09 AM   #1
wuffer is offline wuffer  Denmark
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Default small amp (20-30watt) for fullrange project

can anyone recommend a small amp about 20-30 watt, easy to make.. i was thinking of making speakers for my pc and i would like to try the fullrange...
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Old 15th March 2005, 08:25 AM   #2
Nuuk is offline Nuuk  United Kingdom
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Perhaps you cannot 'see the woods for the trees'!

A chip amp is what you want and you are welcome to start looking here

Then follow the GC web ring and you will have all the information that you need.
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Old 15th March 2005, 08:28 AM   #3
wuffer is offline wuffer  Denmark
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thanks... just that site i was looking for...

so many designs.. what should i go for...
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Old 15th March 2005, 08:32 AM   #4
Nuuk is offline Nuuk  United Kingdom
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Quote:
so many designs.. what should i go for...
My suggestion would be an inverted design using a buffer. Buffer choice is down to what you feel comfortable building, they all sound very good with a GC.

All the designs on my site use the LM3875 but I ahve just built one with an LM3886 that sounds very good too. etails will be posted on DD when I have time.

And don't forget, if you are not happy to build from scratch, there are several people offering PCB's and/or kits.
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Old 15th March 2005, 08:58 AM   #5
wuffer is offline wuffer  Denmark
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thanks.. i think im going to build it from scratch..
it dont seem very expensive so im going for it
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Old 15th March 2005, 12:07 PM   #6
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Why you use the LM1875 for 20w and LM3875 for 50 ~ 60w ?
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Old 16th March 2005, 03:56 PM   #7
wuffer is offline wuffer  Denmark
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what should i use for a volume control??? im going to build it in the same case... nothing fancy or expensive.. only going to use 1 input....

im not sure if i should go for the LM3886 or the LM3875. the price is the same.. going to make a amp for a small 6 inch sub
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Old 16th March 2005, 05:02 PM   #8
Nuuk is offline Nuuk  United Kingdom
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Use the LM3886 for a sub, it will give a bit more power.

And if this is for a sub, any pot will do. Try a 20K or 50K log. If you want specific recommendations, then search this forum.
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Old 16th March 2005, 05:05 PM   #9
wuffer is offline wuffer  Denmark
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thanks.. then i will get 2 LM3875 and 1 LM3886

it was for the stereo amp.. but i will search som more
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Old 17th March 2005, 02:08 PM   #10
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Quote:
Originally posted by Nuuk
Use the LM3886 for a sub, it will give a bit more power.

And if this is for a sub, any pot will do. Try a 20K or 50K log. If you want specific recommendations, then search this forum.

The datasheet specifics one pot 10k

Thanks
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