Therefore, I can recommend this product even at the low price (from approx 75 Euro incl. Shipping) NOT. Now have a MIVOC HYPE 10 ACTIVE SUBWOOFER SW ordered.
PS: I have uploaded a new video, this time with normal music instead of test tones, you can see the piece of paper the leak on the right side of the chassis.
PPS: A few observations ... the chassis is fixed, unlike the manufacturers images with only 4 (instead of 8) tiny Allen screws. The enclosure (chassis called the speakers themselves), according to the description "difficult and low resonance", is only 10mm thick laminated wood (?) - Made plates. It weighs a total of less than 10 kg, incl. Amplifier, chassis etc., perhaps 5 kg remain for the case itself? A nice power supply hum completes the picture.