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Very Simple Preamp
Very Simple Preamp
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Old 21st March 2002, 08:52 PM   #1
Christian is offline Christian
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Not long ago I finished my poweramp based on the Lm3886 chips.
But with this design a lack a preamp, so i juste put the volym pot on the input lines to my poweramp.

If my signal is very weak, am I missing out on some effect?
For instance if i amplify the signal from my computer which isn't a very powerful signal source.

And if this is the case i would be interested in building a very simple preamp in a seperat housing. The input impedance is
10K Ohm.

Any suggestions are very welcome,
Best regards/
Christian V
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Old 21st March 2002, 10:50 PM   #2
sonnya is offline sonnya  Denmark
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Get something like the OPA2134 from TI (former BB) Should be a nice device for your job.

Try look at this thread :


I guess you know how to design with opamps, since you done one with a LM3886T!?

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