Best speaker under 100$ - Experiment...

My equipment: Main camera: https://www.bhphotovideo.com/c/product/1333228-REG/sony_ilce_9_b_alpha_a9_mirrorless_digital.html Head-camera: https://www.amazon.com/Sony-FDRX3000-Underwater-Camcorder-White/dp/B01LYSJB8A/ref=sr_1_2?ie=UTF8&qid=1494529168&sr=8-2&keywords=sony+x3000 Tripod: https://www.amazon.com/Cullmann-CU-52401-Nanomax-Travel/dp/B00HQM1GL2/ref=sr_1_fkmr0_2?ie=UTF8&qid=1494529037&sr=8-2-fkmr0&keywords=cullmann+nanomax+406 Lights: https://www.amazon.com/Neewer-Speedlite-Speedlight-Umbrella-Photography/dp/B008BQ233C/ref=sr_1_6?s=photo&ie=UTF8&qid=1494529228&sr=1-6&keywords=softbox Recorder: https://www.amazon.com/Zoom-H4n-Pro-Batteries-Polishing/dp/B01GVWT696/ref=sr_1_1?s=electronics&ie=UTF8&qid=1494529268&sr=1-1&keywords=zoom+h4n+pro Microphones: https://www.bhphotovideo.com/c/product/473506-REG/DPA_Microphones_SMK4060_SMK4060_Stereo_Microphone_Kit.html Headphones: https://www.amazon.com/beyerdynamic-770-Pro-Studio-Headphones/dp/B0016MNAAI/ref=sr_1_1?ie=UTF8&qid=1494529411&sr=8-1&keywords=beyerdynamic+dt770