The JL Audio ETXv3 Enclosed Speaker System Fixture for Pipe Mounting â 2.500" (M-MCPv3-2.500) is designed to securely mount your JL Audio ETXv2 and ETXv3 enclosed speakers onto 2.500-inch diameter pipes. Built for durability and stability, this fixture ensures reliable performance in challenging environments like marine or powersports settings.• Compatible with JL Audio ETXv2 and ETXv3 enclosed speaker models• Designed for 2.500" diameter pipe mounting• Rugged construction for long-lasting outdoor use | JL Audio ETXv3 Enclosed Speaker System Fixture f/ Pipe Mounting 2.500