Hello Everyone, I am a bit inexperienced when it comes to drilling holes in walls etc. But my room is such that I have a large concrete back wall on which I would like to mount my M72is 4 rear duties. I cannot place them on stands as space restrictions wont allow it. I am considering purchasing the following speaker mounts from Argos: http://www.argos.co.uk/webapp/wcs/stores/servlet/ProductDisplay?storeId=10001&langId=-1&catalogId=2501&productId=105077&Trail=C$cip=16704>C$cip=16705>C$cip=16710&categoryId=16710 I have checked the weight of each M72i and that is 7.5kg per speaker. The mounts seem to be able to support up to 20kg, however, will I be sacrificing anything my using mounts, in terms of speaker balance, tonal output etc....will the sound be affected at all??? Thanx to all who help, EmissarY.