I remove the SpeakOn internal screws and the associated compression part. Then I tightly twist the individual leads separately, tin them in a solder pot and insert the 2 pairs of wires individually into the 2 pairs of metal receptacles. A few seconds with the soldering iron anchors the wires...
Yes. The top surface of the bottom sub is slick and the rubbery feet of the top sub have really small contact points. It would be easy to dislodge the top one without the kit (especially if you stack three).
I really do not profess any insight or, to be honest, great interest in movies. IMHO, LFE is not needed for music recordings. Bass management is available where necessary or desired.
D'accord.
LFE has been (and is) a minor issue with me since the vast majority of my MCH collection does not (and never will) have one. I don't know why it is needed with a really good system.
At my age, I often find it difficult to handle even two at a time, so we are almost in the same (leaky) boat. OTOH, I don't have any trouble focussing on the music at a concert with 100 players.
But that's my point. Listening to stereo, I do not focus on 2 channels but on the music...