Stellar Labs 555-11660 Adjustable Speaker Pole by Stellar Labs. $6.99. This adjustable speaker pole is a perfect solution for mounting a DJ speaker on the top of a subwoofer, or a variety of custom applications. Sold individually. Standard 1 3/8" diameter pole mountAdjustable 32"~54.5" heightHeavy duty steel constructionSupports up to 75lbs.