The OPA-P1 is a screw-on 1,200 mm / 47.24-inch loudspeaker mounting pole with M20-sized thread for mounting one OPALine-82 vertical array loudspeaker to a OPA-151SA subwoofer. Available in Black (OPA P1-Black) or White (OPA P1-White) finishes. The OPA-P1 is made of rugged steel. In addition to the P1 mounting pole, an OPA PSA-82 adapter is required. The OPA PSA-82 is an adapter that attaches to the back of the OPALine-82 speaker and connects it to the OPA P-1 mounting pole. The OPA PSA-82 also offers the flexibility of aiming the speaker straight ahead (0 degrees) or downward (-10 degrees) to deliver sound to the audience.