You might consider trying the Live End / Dead End approach to room treatments the electrostatic master, Dr. Roger West of Sound Lab recommends. See the setup tips page on their website.
To Eric's point, with electrostatics, they interact with side walls(and to some extent ceilings and floors) far less than dynamic speakers, but their rear-facing sound must be firmly dealt with.
If your MLs have dynamic woofer like more of their models do, then you're likely to want bass traps in the front corners to smooth out bass peaks that will smear the details that provide you with the clear soundstage you seek. Cheers,
Spencer
To Eric's point, with electrostatics, they interact with side walls(and to some extent ceilings and floors) far less than dynamic speakers, but their rear-facing sound must be firmly dealt with.
If your MLs have dynamic woofer like more of their models do, then you're likely to want bass traps in the front corners to smooth out bass peaks that will smear the details that provide you with the clear soundstage you seek. Cheers,
Spencer