I feel sorry for bothering you guys back to back but my physics teacher wont answer me because these are useless stuff.
Can you please tell me why when i connect the positive end of the aux to the input (gnd gets connected to gnd) no sound is coming out from the speaker. But when i connect the aux positive end to "A" a very low sound is coming out and ic getting hot. I dont know what the "B" does, connecting to it (aux positive) got no result. I'm sorry for missing component info, some of them are way to old and values got wiped off. Im connecting to it with a 12v transformer.

 

Hello,

Your scribbles are not very clear.
A real schematic, as in the datasheet would be clear:

Bertus

 

Your sketch is missing important details like:
1) Top view or bottom view. It looks like bottom view.
2) Pin 1 (Vcc) is not shown. I think it is the lower left pin.

The schematic in the Chinese datasheet shows a box for its package that shorts all its pins together.

Your "A" is the DC output. If you connect a signal to it then it might get shorted to ground and produce a massive current in the IC causing lots of heat. The output coupling capacitor couples the input signal directly to the speaker causing a low level sound.
The heat might have destroyed the IC then input "B" does not work.

 

Your sketch is missing important details like:
1) Top view or bottom view. It looks like bottom view.
2) Pin 1 (Vcc) is not shown. I think it is the lower left pin.

The schematic in the Chinese datasheet shows a box for its package that shorts all its pins together.

Your "A" is the DC output. If you connect a signal to it then it might get shorted to ground and produce a massive current in the IC causing lots of heat. The output coupling capacitor couples the input signal directly to the speaker causing a low level sound.
The heat might have destroyed the IC then input "B" does not work.

It was the bottom view.
When there is no audio input simply powering on the amp making the speaker go "clrk" at the start and then when i touch its cone i feel slight vibration. So if the ic is burnt would this still be possible ?

 

Hello,

It looks like a chinese copy of the SGS-Thomson TBA810.

Bertus

 

Hello,
It looks like a chinese copy of the SGS-Thomson TBA810.
Bertus

Bertus, good find! It is only 33 years old and I forgot about it because it was European and I only used American audio amplifier ICs 33 years ago.