PAT 300 - 2" Bolt-On 250 Watt 8 Ohm Compression Driver*Sold as each not in pairs. The Massive Audio 12V Pro PAT300 Compression Driver can hold up to 500W with a 8 Ohm VC of 77. 2mm and a sensitivity of 111dB! This 2" bolt on driver can accommodate several styles and designs of horns to round out your system. This driver uses spring loaded connectors and utilize a high power rear "Fin" designed heat sink for cooler running. "On a Stage or in a Car Massive Drives it Home!" FEATURES Bolt On 77. 2mm CCAW