Hi, I am wanting to add ceiling speakers to my downstairs lounge. 3 out of the 4 walls are external so I'm thinking about taking the speaker cables out through the wall nearest where my AV receiver is located. Once the cable is outside I would look to put the cable inside plastic trunking and run this to a height of approximately 15cm above ceiling level and then drill through the wall again which should place the cables at the correct height above the ceiling. Depending on whether I go for 2 or 4 speakers and joist directions etc I presume I will have to drill between 1 to 4 holes. Where any holes are drilled through the wall I would look to seal the hole with some sort of external sealant to protect against any rain ingress. The house is around 1980s so external walls will be brick/cavity/breeze block I believe and the ceiling is just "conventional". Does the above approach seem sensible? Any issues running speaker cables outside the house? What else do I need to think about? Thanks for any advise given. Nigel.