Have 300b MB want a killer pair of Hi-Eff speakers

Looking to fill a 12'X25' room with a speaker that will do justice down to 38hz. Speakers must work 5+ feet from the back wall. May try to integrate a sub down the road,stand or floor mounted ok. 50's & 60's Jazz and vocals my pref. Gota be able to do the left handed piano keys and acoustic bass. Thank you in advance for your recomends!