The Mackie SPM200 Speaker Pole Mount is a heavy-duty pole for mounting your loudspeaker on a subwoofer. Ideal for use with the following Mackie speakers: TH15A SRM350 (v2) SRM450 (v2) HD1221 HD1521 and HD1531 speakers with SRM1801 HD1501 HD1801 subs and more. The speaker pole mount can hold up 110 pounds.