Poles Compatibility: The subwoofer pole mount is designed for speakers with 35mm mounting holes and is perfectly compatible with JBL, Yamaha, Alto, RCF, QSC speakers and many more PA speakers with 35mm mounting ports. No need to worry about compatibility anymore. (Note: Only for speakers or subwoofers with 35mm pole holes. Pole holders are not included.) Flexible Height Adjustment: Our subwoofer speaker pole mount for Mackie, JBL, QSC subwoofer and most of subwoofer features tool-free height adjustments, letting you seamlessly switch between 36" and 44" to fit your exact needs. The subwoofer pole 35mm mount can quickly adapt to different environments. This versatility ensures perfect speaker positioning for optimal sound quality, making it a practical and essential tool for any audio setup.