With a new build imminent, I am trying my level best to get all the set-up pre-planned before the cinema build. With regards to the sound proofing I have instructed the builder for a room with extra thick accoustic plasterboard on both the walls & ceiling filled with rockwool between the cavity. As this build will be on the existing outside wall and have 2 outside walls of it's own, it will be also be situated next to the new build for the kichen so will have a solid wall between them too. I am also thinking of getting accoustic underlay to keep the bass localised as much as I can. However has anyone any further suggestions how I can make it further soundproofed from detached neighbours?