2) Rockville 8″ Tower Speakers+Bluetooth Amplifier+Remote ATV/UTV/RZR/Polaris

Amazon.com Price: $184.99 (as of 02/06/2019 15:22 PST- Details)

Rockville RWB80B Pair of 8″ Black WakeBoard Tower Speakers Totaling 600 Watts (300 Watts per speaker). 8″ Two-Way High Fidelity Speaker System. Adjustable Nylon Mounting Bracket Reinforced With Embedded Steel. 1″ Polymide Dome Neodymium Midrange Tweeter. Built-In Two-Way Crossover Network. Fully Marinized Against Salt & Fresh Water Conditions. Completely Water / Rust Resistant.
Planet Audio PSA4CB All-Terrain 500 Watt 4 Channel Amplifier w/ Bluetooth+Remote . Bluetooth A2DP wireless audio streaming. Max Power Output: 500 Watts . RMS Power Output: 94 Watts x 4 Channel @ 4 Ohm. Full Range, Class A/B. RCA Inputs: 2 Channel. Pre Amp Outputs: 2 Channel. aptX Support. 4-channel micro amplifier, Low Level, Aux Inputs, RCA Pre-amp Outputs. Bluetooth Audio Streaming – play music and apps like Spotify/Pandora wirelessly.
USB Charging, Inline Multi-Function Remote. RCA preamp output to daisy chain multiple amps. Included RED / BLUE-backlit UV / weather resistant silicon button controller. Multi-mount controller system: Includes flush mount bezel and stainless steel handle bar clamp. Compatible with optional MC900SMC surface mount Y controller kit. Compatible with MUSB35 USB /3.5mm extension kit. Thermal, Overload, and Short circuit protection circuitry.

Usually ships in 24 hours