The JL Audio ETXv3 Enclosed Speaker System Fixture for Pipe Mounting â 2.250" ensures a stable and secure installation for your JL Audio ETXv2 and ETXv3 enclosed speakers. Designed for 2.250-inch diameter pipes, this mounting fixture is ideal for use in marine, powersports, and other rugged environments.• Compatible with JL Audio ETXv2 and ETXv3 enclosed speaker models• Designed for 2.250" diameter pipe mounting• Durable construction for long-lasting performance | JL Audio ETXv3 Enclosed Speaker System Fixture f/ Pipe Mounting 2.250