Plato's concept is on the mark--humorous--but imaging a wooden box that sits on the floor and extends beyond the speaker (behind the speaker). Fill the box with lead shot or other suitably heavy material and then use the rear spike taps to attach the rear of the speaker to the box. If it is tightened down firmly it should have some small affect on resonance, but more importantly will make it difficult for the speaker to topple forward.
Difficulty Tilting Martin Logans Foward
My experiments indicate that I get the best sound at my listening position with my 72" Martin Logan Sequel II speakers tilted foward. However, when tilted more than just a little, they are ready to topple over! Anyone out there figure out hot to tilt these foward without knocking them over? Anyone know of any stands that would allow for this? (I emailed sound-anchor but they did not respond).