Max extra speakers for Home Theatre Setup with Soundbar+

Hello

I would like to buy a Soundbar+ to use as front speakers.

I already have 2 Tannoy speakers that I would like to connect using a Bluesound Powernode, and they will be the rear channels.

I would like to know if I can add also 2 or more wireless speakers (like Pulse Flex 2i) to improve Atmos performance.

Thanks a lot