Audio Ace Jester 18" 3000W RMS Dual-4-Ohm Subwooofer With Dyeable Cone

Description Built with the goal of achieving a high level of SQ/SPL.The Jester is rated at 3,000 RMS. Designed with fairly lowFS and a strong motor structure allows the Jester to be versatileenough to sound great across a wide range of music. Whether youare looking to be one of the loudest vehicles in your town, orjust wanting to enjoy the bass in your daily driver at EXTREMEsound levels, the Jester is a great choice! Size 18 Inch RMS 3000w  Heavy Duty Aluminum Basket 4layer 10" Spider Coil Size 3 inch BACCAW 4layer 300oz Motor Impedance Dual 4 Ohm Re 3.53 Le 3.462 L2 7.958 R2 15.78 Cmes 933.61 Lces 31.84 Res 35.07 Fs 29.2 Mechanical Parameters (using laser) Mms 703.831 Mmd (Sd) 658.596 Rms 21.495 Cms .042 Kms 23.68 Bl 27.457 Lambda .008 Loss Factors Qtp .569 Qms 6.006 Qes .605 Qts .550 Misc Parameters Vas 81.8396 n0 .323 Lm 87.30 Lnom 87.83 rmse Z 7.61 rmse Hx 7.87 Box Recommendations 4.75-5.5 cubic foot ported 14-16 square inches of port per cubic foot 28-36hz tuning Opti