If you want to mix and want the tube sound you should drive your speakers with tubes and that's where they're most heard.
You should also pick the appropriate SS pre- preferably MOSFET or JFET that indentically to the tubes amplify voltage instead of current.
In tube-pre case you should ask poweramp's manufacturer if it's OK with tube preamp i.e. there should be an input impedance sufficient enough preferably >40k. Many Pass amps are not successfull with most of the tube preamps due to the very low input impedance.
You can also try passive/tube combo if you've ever thought about it and that's my favourite.
You should also pick the appropriate SS pre- preferably MOSFET or JFET that indentically to the tubes amplify voltage instead of current.
In tube-pre case you should ask poweramp's manufacturer if it's OK with tube preamp i.e. there should be an input impedance sufficient enough preferably >40k. Many Pass amps are not successfull with most of the tube preamps due to the very low input impedance.
You can also try passive/tube combo if you've ever thought about it and that's my favourite.