4' BM40AMPBT Amplified Waketower Speakers - Matte Black - 500W These Matte Black 8' BM40AMPBT Amplified waketower speakers provide next-level audio through a stylish design.  Boss Audio  tower speakers are marine grade, so you can have outstanding sound quality on your boat or UTV.  Features: * Full-Range Class D Amplifier * Fits 1' to 2' wake tower pipes * IPX5 rated in-line remote w/illuminated soft-touch controls * Polypropylene Woofer Cone and Rubber Surround * 1' Tweeter Technical Specifications: * Speaker Impedance - 4 ohms * Cone Material - Water-Resistant IMPP * Sensitivity - 94dB * Frequency Response - 45HZ - 20KHZ * Max Power - 500W * 250 Watts RMS * Dimensions (W x L x H) - 5.54' x 7.17' x 7.43' * Weight 5.58 lbs In the Box: * Two (2) 2-Way waketower speaker * Bluetooth multi-function controller  * Power wire harness * Mounting hardware * Instruction manual *Sold as a Pair Warning [https://productimageserver.com/prop65/6pt.png]WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov [http://P65Warnings.ca.gov].