@rubik7733: Crazy passive radiator excursion test on this DIY portable speaker build! Watching those top passive radiators move and flex under low frequencies is absolute satisfaction. Designed this compact Bluetooth speaker setup with multiple passive radiators, a dedicated main driver, and a crisp tweeter to maximize bass output without blowing up the box size. Put on a good pair of headphones to hear the sub-bass notes driving all this movement, rate the flex from 1 to 10 in the comments below, and drop your track suggestions for the next extreme excursion test! #diyaudio #bluetoothspeaker #passiveradiator #basshead #customaudio