Please help me build a guitar amp.

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apakhira

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Hi
I have a box with 4 speakers- 2 rectangular 4W ones, a square 2W speaker and a tweeter. I want 2 make a guitar amp out of it. I'm thinking of using the LM386(that's what i think it is) 8W Audio amp IC. Now, do i need 2 have a pre-amp stage b4 the amp or just the amp will do?

Thanx
 

You need to have a preamp, a simple opamp will probably do, although it's as well to add tone controls as well.
 
I have a circuit 4 a 3 band tone control. (Attached here)Please see it. I think if i use this there wouldn't be any need 4 pre-amp cuz that's what i think the 1st op-amp does. Tell me if i'm right.
 

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The LM386 has a maximum output of only about 1/2W.
Maybe you are thinking about an LM384.

Won't those tiny low-power speakers sound kinda tinny?
 
The LM386 has a maximum output of only about 1/2W.
Maybe you are thinking about an LM384.
Click to expand...
U r right. I told u i forgot the name.

Won't those tiny low-power speakers sound kinda tinny?
Click to expand...
Yeah i know. I was just trying to find some use for the speaker cabinet with the speakers which i built when i was a kid. (I can still b called a kid now) Anyway i'm thinking of adding an output socket to drive another speaker when i want, maybe.
 
Guys, could u tell what the value of R2 i the circuit i attached should be? Also, will increasing the value of R1 decrease the gain or increase it. To in corporate a volume control could i put a pot instead of R1 or should i put a separate pot after or before the circuit?
 
A quick Google search found this one, that looks the same.
Note that your circuit also needs an input resistor and maybe also an input coupling capacitor.
**broken link removed**
 
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