Rockville 18" Replacement Sub Driver for JBL Pro JRX218S Subwoofer – 900 Watts RMS / 4 Ohms

Overview: Rockville's 18" replacement sub driver is made as a direct swap for the JBL Pro JRX218S, engineered for high-output PA and pro audio use. Rated to handle intense power, it delivers Peak Power : 1800 Watts and Power RMS : 900 Watts. Construction & Motor: The cone is a Kevlar Reinforced Ultra Stiff Paper Composite with a Pulp Composite Dust Cap, housed in an Expanded and Rolled Steel Basket. It uses a Ultra Saturated, High BL Magnetic Motor Gap 3 High Temperature 4-Layer CCAW High SPL Voice Coil and a Linear Progressive Conex Dual Spider System for stable excursion and control. Suspension & Terminals: The surround is a Treated Accordion, Asymmetrical W Cloth Surround. Connections are provided via Nickel Plated Banana Plug Terminals. Basic Specs: Impedance : 4 Ohms. Magnet weight: 107 oz. Magnet Motor Structure Mounting Depth: 7.36" inches. Frequency Response : 20 Hz to 500 Hz. Sensitivity : 105dB @ 1w/1m. Thiele-Small and Performance Data: REVC: 3.2 Ohm. FO: 31.852 Hz. SD: 128.825m M. BL: 15: 936 TM. QMS: 4.641. QES: 0.390. QTS: 0.360 NO: 3.042%. SPLO: 105 dB. VAS: 380.079 m M. CMS: 161.281 uM/N. MMS: 154.805 g. MMD: 128.218Kg. This driver is a purpose-built replacement that preserves the electrical and mechanical specifications required for reliable performance in JBL JRX218S enclosures.