Parasound halo jc2 and A-21 Dali helicons 800 II

I just move to a new place that the size of the living room it's 300 SF,
I have been troubleshooting to obtain the sound I am adjust to, tiring and frustrated I found out that big rooms need higher volume to get the bass!
I use to lived in a basement so quite different scenario,
I switched to my Yamaha s2000 amp with my Polk lsi 15 rather than parasound with dalis at lest better bass
Need help guys!