Want to wire and power an amplifier to the speakers

[mkioiuq1]

I have a few speakers that I salvaged from broken electronics and I plan on buying an amplifier board to drive the speakers.

I'm currently looking at an amplifier such as this one and have sketched a diagram on how I believe it should be wired and powered as to not blow the speakers.

I'm not sure if this is correct or if my calculations are entirely off. I appreciate any help and corrections you could provide.

Also, is there an ideal way to supply the 12V and 11V? I have an old pc psu and some adapters but I'm not sure if those are the best approach.

Thanks

 

[surfatwork]

not sure why you are buying stereo amps if the above is how you plan to connect the speakers.

 

[ISO]

what you will achieve mixing different impedances speakers together?