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New ! Replacement Aftermarket Speaker For Mackie SRM1850 Sub-Woofer 18" Speaker 8 Ohms. This is a Brand NEW Aftermarket 18" Woofer Speaker 3" Voice Coil 8 Ohms For Mackie SRM 1850 (Speaker Only) P/N CY2041539. Please Look And Confirm The 18" Speaker You Are Ordering Matches The Pictures Above & The Specs Below. A Much Improved Substitute. Specifications: Nominal Basket Diameter: 18”, 457mmNominal Impedance: 8 Ohms Power Rating: Watts: 650W Music Program: 1300W Resonance: 28Hz Usable Frequency Range : 40Hz-2.4kHz Sensitivity: 99 dB Magnet Weight: 120 oz Gap Height: 0.375”, 9.53mm Voice Coil Diameter: 3”, 76mmShipping Wt. 28.1 lbs, 13.75Kg We Carry A Full Line Of RCF, Celestion, 18 Sound & Eminence Speakers & Drivers. If You're Looking for A Particular Model And You Don't See It Here, Please Send Us A Message. FREE SHIPPING ONLY In the Lower 48 States. Most Orders Placed Before 3PM and Paid thru' PayPal Are Shipped The Same Day; Monday to Friday PLEASE NOTE: ITEMS SHIPPED OUTSIDE OF THE CONTINENTAL U.S. (ALASKA, HAWAII, & PUERTO RICO) WILL BE SUBJECT TO AN ADDITIONAL SHIPPING SURCHARGE OF EACH ITEM. THE AMOUNT WILL BE INVOICED TO YOU VIA PAYPAL AFTER PURCHASE. IF YOU HAVE ANY OTHER QUESTIONS, PLEASE LET US KNOW. POR FAVOR TOME EN CUENTA: ARTÍCULOS ENVIADOS FUERA DE LOS ESTADOS UNIDOS CONTINENTALES (ALASKA, HAWAII Y PUERTO RICO) ESTARÁN SUJETOS A UN RECARGO DE ENVÍO ADICIONAL POR CADA ARTÍCULO. LA CANTIDAD SE LE FACTURARÁ A TRAVÉS DE PAYPAL DESPUÉS DE LA COMPRA. SI TIENE ALGUNA OTRA PREGUNTA, POR FAVOR DEJANOS SABER.