Are you needing really loud tower speakers but have no room for bulky amps or radio? DS18 now has their first tower speaker that has both built in amplifiers and BT modules so all you need is power and ground connections are you are good to go. Perfect but not limited to buggies, 4 wheelers, motorcycles, and marine! DS18 MP4TPBTHYDRO 4" Amplified With BT Marine/Wakeboard Tower Speakers Black These towers have room for 1.5-2 inch circular bars and can all be linked to the same source. Each built in amp provides 2x40w RMS and 2x120W max power the 4 inch 2 way speakers for loud and clear music where ever you want that's easy to hook up with easy BT pairing with your phone! Highlights 4 inch 2 way coaxial speakers for clear loud sound without sacrificing space. Built in amplifier that puts out 40w RMS and 120w MAX to each speaker. Integrated BT controls to seamlessly pair with your phone and also give you a secondary aux jack option with 2 channel RCA outputs. Compatible with the DS18 remote, MXRC for easy to use controls. Accommodates tower bars 1.5 - 2 inches and solid design is made for durability while also turning heads. Key Features Speakers: Max Power Handling: 120 Watts x2 RMS Power Handling: 40 Watts x2 Frequency Response: 60Hz-20KHz Voice Coil Diameter: 1" Voice Coil Material: PEPSV Impedance: 4 Ohm Magnet Weight: 11 Oz Magnet Material: Ferrite Amplifier Full Range Class D Stereo Amplifier Max Power: 120x2 Watts RMS Power: 40x2 Watts Power and Ground: 16 GA Fuse size: 15a Great For Marine Audio Car Audio Off road DIY Projects Technical Details                      MP4TPBT Product Manual Specifications  Nominal Diameter 4” / 101.6mm Total Watts (Peak) 240W RMS Power @ 4 ohm (Internal Amp) 2 x 40 W @ 14.4V MAX Power @ 4 ohm (Internal Amp) 2 x 120 W @ 14.4V Frequency Response 60Hz-20KHz BODY / FEATURES  Enclosure Material Injection PC+ABS Marine Grade Type IPX5 + UV Stable RGB LED NO Grill Type Injection PC+ABS Pair Yes Clamps Tube Type Fixed with pads for 1-1/2" to 2" Front Logo Yes Finish Matt Black WOOFER SPECIFICATIONS  Voice Coil Diameter 1" / 25.4mm Voice Coil Former Material KSV Cone Material Injection Molded Polypropylene + UV Compliant Surround Material Butyl (Rubber) Basket Material Steel with Black protection coating Magnet Material Ferrite Magnet Weight 11 Oz Magnet Diameter 3.14" / 80mm TWEETER SPECIFICATIONS  Voice Coil Diameter 1" / 25mm Voice Coil Former Material ASV Winding Material CCAW Type Dome Diaphragm Material PEI Magnet Material Neodymium Magnet Weight 45g Crossover 6dB/Oct AMPLIFIER SPECIFICATIONS  Amplifier Class Stereo Full Range Amplifier Type Digital Number of Channels 2 Channels Minimum Impedance 4 ohm Signal to Noise Ratio 127dB Audio Source BT Audio Streaming V5.0 Power Input Terminal Size 16 Ga Fuse Size 15 Amp Wired Remote Control Input Yes (compatible with MXRC) Thermal Protection Yes (>75°C / 167°C) Over-Load Protection Yes DC Output Protection Yes Short Circuit Output Protection Yes Voltage Input Protection Yes (18V) MEASUREMENT  Overall Diameter 5.51" / 140 mm Overall Depth 8.07" / 205 mm Overall Height 7.28" / 185 mm with clamp