The Ultimate Ears Wonderboom four is undoubtedly the best cheap Bluetooth speaker on this list, combining good sound with an ultraportable design and effective 360-degree audio. It's just a straight-up Bluetooth speaker (so no Wi-Fi) however you can pair two of these together possibly in stereo or dual mono. https://www.bluetoothspeaker.top/bluetooth-speaker-inalambrico-wireless-bluetooth-speaker-with-rgb-lights/