Dual LM386 Not Working

[amereservant]

Forgive me for my lack of understanding, but I'm curious why this doesn't work.
I'm trying to run dual LM386 chips off of a single 9V power supply and perhaps that's the main issue. I basically built this circuit twice:
LM386 Audio Amplifier Circuit with no gain modification between pins 1, 5, and 8.

The problem is shown in this video:
Dual LM386 Op Amps Making Terrible Noise - YouTube

Thanks for your feedback!

 

[Bone]

Sounds like you are overloading the input with too much signal. If you want it louder use external circuit A to give a gain of 200, and then try it.

 

[nigelwright7557]

When I was a rookie electronics engineer when I was being taught my whole class built LM386 amplifiers. I don't think anyone got one working properly. The main problem was overheating.

I know now from years of experience that the chip hadnt been decoupled closely.
Use 100nf and 47uf close to the LM386 to decouple it across pins 6 and 4.

 

[amereservant]

Sounds like you are overloading the input with too much signal. If you want it louder use external circuit A to give a gain of 200, and then try it.

Here's the exact same circuit and input levels as in the previous video, but with one of the LM386 chips removed:
Single LM386 Op Amp - YouTube

@nigelwright7557, Thank you for the tip! I'll give it a shot and see what happens.