You can go to Home Depot and get a couple of concrete "stepping stones". They come in various sizes like 12"x12", 18"x18" or 24"x24". They are about 2 inches thick. You could put some heavy duty cones under them to couple them to the floor if needed. Place your current stands on top of these "risers".
Also, using the existing spikes, you could tilt the stand/speaker back a little by adjusting the spikes to facilitate the bachward lean angle. This accomplishes much the same result as raising the height. It's FREE, so try it!!
Also, using the existing spikes, you could tilt the stand/speaker back a little by adjusting the spikes to facilitate the bachward lean angle. This accomplishes much the same result as raising the height. It's FREE, so try it!!