Curious if anyone has hooked up a pair of monoblock Aegirs to the Sig II’s and how well they drove them on the bottom end?
Never bridge amps, you turn a "good" stereo amp into a more powerful "mediocre" amp
By bridging stereo amps you gain wattage, but you loose low impedance drivability, stability, and increase distortion.
If the Vandersteen’s go down in impedance with low’ish -phase angle in the bass then things "could" be worse not better.
Your better to use the Aegir on the mids and highs and the Vidar on the bass and if they are different gains use a Schiit Sys on the louder of the amps to reduce it to the others level then use your Schiit Freya + preamp as the master still.
Cheers George