If the speakers wobble when you're walking near them, it's the floor that needs sorting.
Is the underfloor space accessible? And can you fit under it? The floor joists probably rest on small brick walls at intervals, and they can move/settle over the decades. This can lead to the joists "hovering" over their supports in places. By using a car jack to slightly lift the joist, and then shimming into the space with something hard and permanent (not wood, pieces of slate are ideal) then lowering the joist back will sort things for a few more decades. Shimming it too much though will make other joists hover though, so don't go mad with it!
Sounds like a bit of a faff, but really it's quite simple. If I can do it (and I have) then anyone can
I just dropped in, to see what condition my condition was in
T/T: Inspire Monarch, X200 tonearm, Ortofon Quintet Blue. Phono: Project Tube Box CD: Marantz CD6006 (UK Edition); Amp: Musical Fidelity A5 Integrated.
Speakers: Zu Omen Def, REL T9i subwoofer. Cables: Atlas Equator interconnects, Atlas Hyper 3.0 speaker cables
T'other system:
Echo Dot, Amptastic Mini One,Arcam A75 integrated, Celestion 5's, BK XLS-200 DF
A/V:
LG 55" OLED, Panasonic Blu Ray, Sony a/v amp, MA Radius speakers, REL Storm sub
Forget the past, it's gone. And don't worry about the future, it doesn't exist. There is only NOW.
KICKSTARTER: ENABLING SCAMMERS SINCE 2009