Your h/u is probably putting out about 22wrms to those speakers... now if that's not enough for you... you can always amp them.
Since they are rated at 60wrms a 2channel 100-120wrms would be premium...
Although most that are looking for decent musical sound quality don't like the approach to amping rear coaxial speakers... they would rather do without entirely or go with a decent midbass driver(s) that will fit or be made to fit and amp those...
For good staging... concentrate on your front... maybe a set of components and amp those

