A clip for use in acoustically isolating a wallboard support channel from a frame member, the support channel having at least one mounting point, includes a first portion positionable between a first surface of the channel and the frame member, a second portion positionable in contact with a second, opposite surface of the channel, and a bracket connecting said first and second portions. The first and second portions and the bracket each have at least one fastener opening in registry with corresponding openings on the other of the first and second portions such that a fastener passing through the openings and the mounting point is acoustically isolated from the bracket and from the channel.