change from wilson benesch p3.0 to magico s5 mk1

A customer of mine had a pair of paramount 200 watt amps. Traded them for an Esoteric 30 watt class A stereo amp....the bass was so much better. Look for a good amplifier...The midrange on WB speakers is exceptional, never loss site of that and if you aren't taken with it then the new amp and perhaps a lovely tube preamp. 

thanks. i think its my room is to big and hard. im gonna try more acoustic treatment. i believe my vitus sia 025 is a very good rich liquid sounding amplifier. would i be correct is saying the harder the reflective surface are in a room the mid top end will be brighter harsher and the mid low will be softened?

I never needed much room treatment with the WB speakers from the small monitor trinity to the larger Endeavours. . Let your speakers tell you when they are happy. Bring them out from the walls toe them in a bit sit about 6 to 8 feet back and then see how they sound. 

These speakers take quite a while to break in so be patient, relax ( I know that is difficult ) and see how they blossom. 

Sounds like you are looking for fuller bass. You don't say what speaker cables you have; they are important for synergy at this level. Not sure the sealed cabinet S5 would get you more fullness.

howdy i use purist audio neptune 3 metre luminist series also i have made significant changes that have helped the bass bloom more.