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The input capacitor polarity is not reversed, it is normal because the signal source is probably at 0VDC and the input pin on the IC is at half the positive supply voltage.Alright, that is how i have it, one lead of the resistor is connected to the speaker out wire and to pin 5, all in a bit of solder. This is also doubled for pin 7. I was looking at the schematic and pcb, and it seems that the 1uf cap from the input is reversed, that the input goes in throught the negative end and goes into the IC through the positive end.
Unless you say the impedance of your speaker then we are just guessing.Alright, how big of a power supply do you recommend?
The datasheet says that the max allowed chip temperature is 150 degrees C. The chip is inside the case where you cannot measure it, you can only calculate its temperature. the temperature can be anything, not a peak.I checked the datasheet to see how hot it would get and it said it peaks at 150 C.
It should not be hotter than just a little warm if it is not working hard. It will be very warm when it is working hard.It seems to be getting very hot, although it does not smell like it is burning and causing damage.
The datasheet shows that its output is down slightly (-3dB) at 30Hz which is a very low sound frequency. It should sound like a woofer that is missing a tweeter. Maybe you hear the terrible high frequencies from the woofer that have a strong peak at about 5kHz. A woofer uses a crossover network that reduces sounds above about 3kHz so you don't hear the terrible peak.It seems to amplify higher frequencies more than lower ones, even when the music is only a bass.
Maybe your speakers play bass sounds poorly.What changes could I make to help amplify the lower frequencies, would caps on the speaker outputs work, depending on their size? I am sorry for my previous negligence, however i am not going to give up.
If you have a mono (single channel) volume control then its pot has 3 pins all on one side.The pins on the pot are not for a switch
I think they are an on-off switch.The other two pins on the back
Then it is a cheap no-name-brand poor quality speaker.I cannot find any information online about the speakers besides RoHs
What? Of course the speaker wires have an amplified signal and they must be insulated.Since the speaker output wires are not carrying an amplified signal, do they need to be insulated?
All grounds on the schematic including pin 4 and the 0V of the power supply must be connected together.since the heatsink is connected to Pin 4 which is grounded, it also does not need to be connected to ground?