The R50 Cooper comes with 6x9's in the rear as standard.
They are awful, replaced mine with Infinity Kappa 6x9's.
In the Summer i'm replacing those with some Focal 6x9's.
The front were 5 1/4 inch and i replaced those with 165mm
MB Quart components, which i'm replacing with Focals too.
The speakers sound great, especially as they are powered with MTX
amps, but they have been in for 7 years, so it's time for an upgrade.