Abstract: In conventional audio disc playback apparatus the pick up arm is mounted on the turntable baseplate. Thus, the pick up arm is subject to vibration produced by the rotation of the turntable and its associated motor.Sound reproduction apparatus comprises a turntable 1, a pick up arm 2 and clamp apparatus 3 for attachment of the pick up arm 2 to a wall 4. The clamp apparatus 3 comprises a wall mounting bracket 5, a length adjustment tube 6, a distance bar 7 and a pick up arm clamp fork 8. Locknuts 9a, 9b and 9c are also provided and the clamp fork 8 has a pair of lockable adjusters 10.In use, the wall mounting bracket 5 is fixed to a wall by way of screws. The length adjustment tube 6 is attached to the bracket 5 and the distance bar 7 and locked in position by locknuts 9a and 9b. The clamp fork 8 is fixed to the distance bar 7 and the pick up arm 2 is fixed to the clamp fork 8 by way of the lockable adjusters 10.