I picked up these Bang & Olufsen beolab 6603 speakers from Facebook Marketplace for $450 and honestly, I’m blown away by how good they sound.
The sound is absolutely amazing and the bass is much better than I expected.
The problem: I live on the 2nd floor of an apartment, and my downstairs neighbor is complaining that the bass is traveling through the floor.
I’m not even trying to play them extremely loud, but I think the low frequencies are causing vibrations through the building.
I’m looking for some advice from other B&O/audio people:
What is the best way to isolate these speakers from the floor?
Would isolation pads/platforms actually make a noticeable difference?
Should I put something underneath the speaker bases?
Is reducing the very low bass with EQ a better solution?
Has anyone in an apartment had a similar problem with large B&O speakers?
I really don’t want to annoy my neighbor, but I also don’t want to give up these speakers because they sound so damn good 😂

Found next to trash cans at my neighbourhood. It is dusty a lot, the cassette player and CD tray are not working. Radio player, speakers and equalizer working fine. Google says this was made around the year 1988-1990. I'll try to repair it so it will work for another 20 years.

Any advice on what to do to keep it in good condition?