Quote Originally Posted by JOGARA View Post
Going off what people said, higher voltage the better? So close to the max of the drivers.
...which is what you will get if you use a lower voltage transformer. Yes, I know it doesn't sound right, but in practice a 45V or so transformer will end up giving you around 68V DC across the smoothing capacitor(s). This also gives a bit of allowance for the fact that the mains input voltage will vary, and the transformer will probably give you about 5% over the rated voltage under light load to allow for a drop when on full load.

EM806 are good drivers.