The Selenium by JBL 10MB3P is an 10" woofer for midbass professional sound reinforcement. This woofer is capable of supporting 300 watts RMS and is ideal for compact enclosures (closed, vented or horns). The aluminum die cast frame provides the array with high mechanical resistance. This woofer includes an impregnated cloth surround, stable spider and a large central vent channel for reducing long-term heat build-up. The 10MB3P delivers outstanding midrange and exceptional long term performance.