Speakers with deep/powerful bass

Just buy some Svs 4000 or ultra subs they will go lower and with more impact 

with their high current amplifiers built in and 13-16 inch drivers 

buying 2 will balance out the rooms Bass.

I love my KEF Blades!  Great bass for sure and it fills my room and sounds amazing.  Definitely the most full range speakers I’ve ever had.

Used a 25 inch sub for dances for a while.  Could rattle every window in the whatever venue I was in if you let it.  Not intentional, but cracked a plate glass window doing a wedding dance at a Holiday Inn once.  Used a Phase Linear amp on it, high damping factor, had good control over the sub! 

In 1991, I had Cerwin Vegas.  They could rip the roof off and keep going. So much fun.  Funny thing is, they really weren't that bad of a hifi speaker. They weren't great either but they were all around serviceable.