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Registered Member #3114
Joined: Sat Aug 14 2010, 08:33AM
Location:
Posts: 608
I was going to make a guitar amp for a friend, I planned on using a 20 watt amp and if I can a 12" speaker.
Can I use a sub?
All I have is a volume control for the amp and would like to have some basic treble, bass, mid, and gain controls. I found some basic circuits that work with the lm386 ic for a preamp setup, except that only covers bass and gain.
If I use them can I run both outputs to the 20 watt amp for different effects, if so could the configuration be explained?
I would hopefully like to keep it cheap after all this is just something they will practice with.
If there is an ic that can do all of these effects or a simpleish enough circuit diagram that would be very helpful.
Registered Member #2838
Joined: Fri Apr 30 2010, 07:55PM
Location: tehachapi, CA
Posts: 333
You can use a sub but you should take a few things into consideration. First, the frequency ranges of the sub that you are using. Second, most "guitar amp" speakers have a percentage of breakup (distortion) at certain frequencies. If you use a subwoofer you may see much lower tone output from the speaker depending on its specs. And you will likely see breakup on most of your highs.
As far as using the 386 for a preamp with EQ just do some searches online. There are several websites discussing the use of LM386 as a preamp with an equalizer.
If you list what IC you plan to use for your amplifier i am sure that someone can give you a few better options for band filters.
Registered Member #3114
Joined: Sat Aug 14 2010, 08:33AM
Location:
Posts: 608
I think that I will just go with a single lm386 preamp to a just the gain, after all this is purely a practice amp and other effects can be made using a distortion pedal
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Guitar amp effect circuits
