A speaker assembly has a speaker housing and one or more clamping subassemblies, with each subassembly including a drive dog, a clamping dog with a dogleg, a compression spring, and a dog screw, and with each subassembly capable of transitioning between four positions. In a parked position, the entire clamping subassembly is housed in the speaker housing with the compression spring in a compressed state between drive dog and the clamping dog. By rotating the dog screw, the clamping subassembly is transitioned to a ready-to-release position where the dogleg of the clamping dog extends out of the speaker housing. By pushing the dog screw, the clamping subassembly is transitioned to a released position, where the compression spring forces the clamping dog away from the drive dog. By further rotating the dog screw, the clamping subassembly is transitioned to a clamped position, where the compression spring returned to the compressed state.