I believe the options for tilting the speakers up, are hockey pucks, or Auralex pads:

MoPAD: http://www.auralex.com/sound_isolation_mopad/sound_isolation_mopad.asp
SpeakerDudes: http://www.auralex.com/sound_isolation_speakerdudes/speakerdudes.asp


Pioneer PDP-5020FD, Marantz SR6011
Axiom M5HP, VP160HP, QS8
Sony PS4, surround backs
-Chris