Subwoofer with Floorstanding Speakers?

Rarely, if ever, is the location of the main speaker optimized for BOTH bass and mids and high frequencies. It's the reality of acoustics within a room. Furthermore, I have never heard of someone removing their subs IF they have been properly integrated and dialed in.  

Not only will your Def Leppard sound better but so will every other type of musical recording.

First step would be to upgrade power amp. Then the rest of the audio chain.

Adding subs is a complicated matter and a final step, if needed.

Added two Rythmik F12SE’s to my Revel Ultima 2, Studio 2’s. I’m 2 channel only. It definitely was worth it. It’s just a fuller sound, and I think one way of describing the improvement is that they hit low base with strength and tightness.

As you can see, the answer is...

Yes, no, maybe, kinda and no, it won't work.

@inna I’m running a McIntosh MA8900 with 200 continuous watts - plenty of power for my current speakers. The only other component is my Roon Nucleus+.  I’m all digital.