E90 base stereo Bavsound stage 1 and SWS 8 upgrade

Hi,

I have E90 base stereo (no amply and no under-seat sub-woofer).

Is it ok to do the Bavsound stage 1 upgrade (so 4 mid-range and 4 tweeters) and add 1 SWS 8 to the under-seat? Can the HU power them all?



Thanks