I have a bi-amp set-up, using a Rega Mira (integrated) and Maia (power) amps to run Rega jura loudspeakers. I am thinking of upgrading speakers, posssibly to a pair with lower impedance, so am keen to work out the power of these two. The Mira is rated as 91 watts both channels into 4 ohms. The maia is rated as 130 watts driven into both channels at 4 ohms. If I am looking at 4ohm speakers, do I just add the two together to get the amp power output? Does that fact that I am bi-amping rather than monoblocking make a difference to the figures? thanks for any help.