I've owned the Lores in the past. I ended up putting the spikes in the front and nothing in the back. It give a tilt that worked well for me. Try it, it might work for you also.
Also try putting the speaker closer to the wall with the spikes on and further from the wall with the spikes off.
Also try putting the speaker closer to the wall with the spikes on and further from the wall with the spikes off.